6r80 rebuild guide pdf – your final information to tackling transmission repairs. Unleash the potential of your automobile’s 6R80 transmission with this complete guide. Uncover tips on how to establish frequent points, supply the fitting elements, and grasp the intricate rebuild course of. From preliminary disassembly to meticulous reassembly, this useful resource will equip you with the data and confidence to convey your transmission again to life.
Study to forestall future issues and preserve optimum efficiency. This guide is not only a information; it is your key to unlocking a smoother, extra highly effective driving expertise.
This guide supplies a step-by-step method to the entire 6R80 rebuild course of. It dives into every thing from understanding the transmission’s intricacies to meticulously choosing the proper instruments and real elements. The detailed procedures, coupled with troubleshooting ideas, equip you to confidently sort out any challenges that come up through the rebuild. It’s a complete information that empowers you with the know-how to revive your automobile’s transmission to peak efficiency.
Get able to grasp the artwork of transmission rebuilding!
Introduction to 6R80 Transmission Rebuild
The 6R80 transmission, a classy electronically managed computerized transmission, is a well-liked alternative in lots of fashionable automobiles. Its intricate design, combining a number of gears and clutches, permits for clean shifting and environment friendly energy supply. Nevertheless, like every advanced mechanical system, it is vulnerable to put on and tear, doubtlessly resulting in expensive repairs. Understanding the frequent points and the method of rebuilding can prevent vital bills.The 6R80 transmission, ceaselessly present in vehicles and SUVs, is thought for its strong construct.
But, extended use, harsh driving circumstances, and neglecting routine upkeep can contribute to part failure, in the end requiring a rebuild. Components like towing heavy hundreds, frequent aggressive acceleration, and insufficient fluid adjustments can speed up put on on inside elements, resulting in potential failures and in the end, a transmission rebuild.
Typical Causes for 6R80 Transmission Rebuild
A number of points can necessitate a 6R80 transmission rebuild. These vary from seemingly minor issues to vital inside harm. Failure of inside elements like clutches, solenoids, and valve our bodies is a typical cause. Moreover, improper fluid adjustments, or the usage of incorrect fluid varieties, can lead to vital harm. Different causes embrace untimely put on as a consequence of towing or off-road driving.
Widespread Points Encountered Throughout 6R80 Transmission Rebuilds
Throughout a 6R80 transmission rebuild, a number of points are ceaselessly encountered. Incorrect part identification or mismatched elements can result in expensive delays and problems. Improper torque specs on fasteners may cause untimely failure. One other frequent downside is the misalignment of inside elements, which frequently necessitates in depth troubleshooting and changes.
Comparability of 6R80 Transmission Rebuild Kits
Selecting the best rebuild equipment is essential for a profitable restore. Quite a lot of kits can be found, every providing various ranges of elements and high quality. The desk beneath supplies a comparability of various 6R80 transmission rebuild kits, highlighting key components to think about:
| Rebuild Equipment | Parts Included | Estimated Value | Guarantee | Buyer Opinions |
|---|---|---|---|---|
| Equipment A | Full set of elements for rebuild | $800-$1200 | 12 months | Usually constructive, some reported points with clutch high quality |
| Equipment B | Main elements, some minor elements excluded | $600-$800 | 9 months | Good worth, however some clients wanted extra elements |
| Equipment C | Contains gaskets and seals, some inside elements | $400-$600 | 6 months | Nice for budget-conscious clients, however requires extra analysis |
A radical inspection of the transmission’s inside elements is important earlier than buying a rebuild equipment. This ensures the equipment’s elements are appropriate with the precise put on patterns and harm noticed within the transmission. Moreover, studying buyer opinions and in search of recommendation from skilled mechanics can present helpful insights.
Figuring out Real Elements for 6R80 Rebuild: 6r80 Rebuild Guide Pdf
Selecting the best elements is essential for a profitable 6R80 transmission rebuild. A defective half can result in expensive repairs and a irritating expertise. Understanding tips on how to establish real elements ensures you are getting the standard and reliability wanted for a long-lasting restore. Utilizing counterfeit or inferior elements can compromise the transmission’s efficiency and sturdiness, and doubtlessly result in a complete failure.Real 6R80 elements are meticulously engineered and examined to satisfy particular efficiency requirements.
They’re designed to work seamlessly with the present elements of the transmission, guaranteeing clean operation and longevity. These elements have undergone rigorous testing to ensure their high quality and reliability. This dedication to high quality interprets to a extra dependable and lasting transmission rebuild.
Significance of Real Elements
Utilizing real elements in a 6R80 rebuild is paramount for a number of causes. Real elements are manufactured to exacting specs, guaranteeing correct match and performance. This precision reduces the chance of leaks, untimely put on, and in the end, expensive repairs down the street. Real elements are additionally backed by warranties, which might present peace of thoughts and safety towards potential points.
Figuring out Real 6R80 Elements
Real elements sometimes function a particular half quantity and branding. Search for official producer markings or logos. At all times test for producer’s authenticity seals and stickers. These options function visible indicators, serving to you distinguish real elements from counterfeits. At all times cross-reference any half quantity you discover with official vendor lists or the producer’s web site.
Real elements are sometimes related to higher high quality management procedures, and producers sometimes supply complete documentation and assist.
Real vs. Aftermarket Elements
| Characteristic | Real Half | Aftermarket Half |
|---|---|---|
| High quality Management | Rigorous testing and high quality checks | Variable high quality management; doubtlessly inconsistent |
| Sturdiness | Designed for long-term reliability | Could not match real half sturdiness |
| Efficiency | Optimized for optimum transmission perform | Could end in suboptimal efficiency |
| Compatibility | Designed to suit completely with different 6R80 elements | Potential for fitment points |
| Guarantee | Typically backed by a producer’s guarantee | Restricted or no guarantee |
| Value | Usually greater preliminary value | Probably decrease preliminary value |
This desk highlights the important thing variations between real and aftermarket elements. The preliminary value could also be greater with real elements, however the long-term reliability and lowered threat of expensive repairs usually outweigh the preliminary funding.
Potential Dangers of Utilizing Non-Real Elements
Utilizing non-genuine elements can result in a wide range of issues. Mismatched elements may cause untimely put on, which results in expensive repairs. These elements is probably not correctly examined, doubtlessly compromising the transmission’s total perform and security. In some instances, improper supplies used within the manufacturing of non-genuine elements may cause severe malfunctions, resulting in extra vital harm and dear repairs.
Be cautious, and all the time prioritize high quality and reliability over value financial savings.
Instruments and Supplies Wanted for 6R80 Rebuild
Getting your palms soiled with a 6R80 transmission rebuild is a rewarding expertise. Nevertheless, it is essential to have the fitting instruments and supplies to make sure a profitable and secure job. This part supplies a complete information to the required instruments, categorized for straightforward reference, together with security precautions. Correct preparation is essential to a clean rebuild.
Important Hand Instruments
A well-stocked toolbox is your greatest buddy throughout a transmission rebuild. A various assortment of hand instruments will facilitate environment friendly disassembly and reassembly. The instruments listed beneath are important for the exact and secure dealing with of elements.
- Sockets and Wrenches: Numerous sizes are important for loosening and tightening bolts and nuts all through the transmission. A deep socket set is especially helpful for accessing fasteners in tight areas.
- Screwdrivers: Flathead and Phillips head screwdrivers in numerous sizes are wanted for eradicating screws and fasteners. Precision screwdrivers are important for delicate elements.
- Pliers and Needle-nose Pliers: For gripping and manipulating small elements, these are indispensable. Needle-nose pliers are important for intricate duties.
- Hammers: A number of hammers, together with a rubber mallet, is essential for mild tapping and eradicating cussed elements. This helps stop harm.
- Torque Wrenches: Utilizing the proper torque on fasteners ensures correct meeting. A torque wrench is significant to forestall over-tightening or under-tightening.
- C-Clamps and Vise Grips: Holding elements securely throughout restore is important for correct work. C-clamps and vise grips are useful for this goal.
Specialised Instruments for 6R80
Past fundamental hand instruments, specialised gear considerably improves the effectivity and accuracy of the rebuild course of.
- Transmission Jack: A transmission jack, or an identical lifting gadget, is critical for safely supporting the transmission throughout disassembly and reassembly. This protects the elements and prevents harm.
- Transmission Help Stands: Stands make sure the transmission is satisfactorily supported through the course of, lowering stress and stopping harm.
- Magnetic Choose-up Instruments: These instruments are invaluable for retrieving small, metallic elements that may simply be misplaced throughout disassembly. This ensures no essential elements are misplaced.
- Stress Gauge: For correct strain testing of the hydraulic system. This ensures the system capabilities accurately after rebuild.
- Transmission Pan: A devoted pan catches fluids through the draining course of, guaranteeing secure disposal.
Supplies for 6R80 Rebuild
The fitting supplies are simply as essential as the fitting instruments.
- Transmission Fluid: The right sort of fluid is important for correct operation. Utilizing the desired fluid ensures clean efficiency and prevents harm.
- Gaskets and Seals: Utilizing new gaskets and seals ensures a leak-free and strong transmission. Changing worn or broken elements is important.
- O-rings: These important elements stop leaks and guarantee correct perform. Correct substitute of worn O-rings is important.
- Lubricants: Lubricants are important for clean operation and stopping friction. Making use of the fitting lubricants ensures environment friendly operation.
Security Precautions
Security ought to all the time be a prime precedence.
| Security Measure | Clarification |
|---|---|
| Eye Safety | Put on security glasses or goggles to guard your eyes from flying particles or potential hazards. |
| Gloves | Use acceptable work gloves to guard your palms from sharp edges or potential contamination. |
| Correct Lifting Methods | Use correct lifting strategies to keep away from again accidents when dealing with heavy elements. |
| Clear Work Space | Hold your workspace clear and arranged to forestall accidents. |
| Air flow | Guarantee correct air flow if working with fluids or solvents. |
Step-by-Step Procedures for 6R80 Rebuild
This part dives deep into the sensible points of 6R80 transmission rebuilding, outlining the essential steps from disassembly to reassembly. Mastering these procedures is essential to a profitable rebuild, guaranteeing your transmission operates easily and reliably for years to return. Bear in mind, meticulous consideration to element all through this course of is paramount.The meticulous strategy of rebuilding a 6R80 transmission requires a deep understanding of the part interactions and exact procedures.
A well-executed rebuild ensures a strong and dependable transmission, extending its lifespan considerably. Correct torque specs are important for optimum efficiency and longevity.
Disassembling the 6R80 Transmission
Cautious disassembly is the muse of a profitable rebuild. Every step should be carried out methodically, guaranteeing no elements are broken or misplaced. Incorrect procedures can result in irreversible harm and dear repairs. Begin by eradicating the transmission from the automobile and completely cleansing the outside. This helps to establish any potential points early on.
- Take away the transmission pan and filter, noting their situation. Any vital harm or put on must be addressed through the cleansing course of.
- Disconnect {the electrical} connections, meticulously documenting their location for reassembly.
- Rigorously take away the enter and output shafts, guaranteeing the correct sequence of actions.
- Detach the valve physique, meticulously separating the elements for thorough inspection and cleansing.
- Disassemble the torque converter, paying attention to all of the elements and their placement. Correct identification is important for correct reassembly.
- Take away the varied clutches, bands, and different inside elements, meticulously documenting the order and place of every half. This ensures that the elements are positioned again of their authentic positions throughout reassembly.
Inspecting and Cleansing Parts
Thorough inspection of every part is essential. Visible inspection, coupled with cautious checks for put on and tear, ensures optimum efficiency after the rebuild. This stage is important for figuring out and addressing potential issues early on. Search for indicators of injury, put on, and tear. Cleanliness is significant for correct lubrication and clean operation.
- Examine every part for harm, put on, or defects, meticulously noting any discrepancies. Doc any findings for future reference and potential substitute.
- Clear all elements utilizing acceptable cleansing solvents, guaranteeing thorough removing of particles and contaminants. This ensures correct lubrication and longevity.
- Examine the situation of the seals and gaskets. Exchange any broken or worn elements. Guarantee seals should not stretched or broken in any method.
Reassembling the 6R80 Transmission
The reassembly course of is equally essential. Correct placement and correct torque specs are important for the transmission’s correct perform. This desk particulars the important steps of reassembling the 6R80 transmission.
| Step | Process | Crucial Concerns |
|---|---|---|
| 1 | Set up the enter shaft | Guarantee correct alignment and safe mounting. |
| 2 | Set up the output shaft | Verify right alignment and safe mounting. |
| 3 | Set up the valve physique | Confirm all connections are safe and correctly aligned. |
| 4 | Set up the torque converter | Guarantee correct alignment and safe mounting. |
| 5 | Set up the clutches and bands | Confirm all connections and alignments are correct. |
| 6 | Set up the transmission pan and filter | Verify correct seating and safe mounting. |
Significance of Torque Specs
Correct torque specs are essential throughout reassembly. Utilizing incorrect torque values can result in untimely failure or harm to elements. At all times seek the advice of the producer’s specs. Utilizing a torque wrench is important for accuracy.
Correct torque ensures elements are securely mounted, stopping loosening and potential harm.
Troubleshooting Widespread 6R80 Rebuild Points
Taking over a 6R80 transmission rebuild is a rewarding problem, however potential issues can crop up. Understanding tips on how to diagnose and resolve these points is essential for a profitable rebuild and a dependable completed product. This part will cowl frequent pitfalls and efficient options.Understanding the nuances of the 6R80’s inside workings is essential to recognizing issues early. By meticulously inspecting elements and listening to delicate clues, you’ll be able to stop expensive errors and guarantee a clean, trouble-free rebuild.
Figuring out Potential Points
Potential points throughout a 6R80 rebuild vary from seemingly minor part harm to extra advanced inside failures. A radical inspection of each half is paramount to profitable restore. This course of contains checking for put on, harm, or any indicators of inside part failure.
Diagnosing Points: A Systematic Method
A scientific method to diagnosing points is essential. Start by rigorously inspecting the transmission’s inside elements for put on, harm, or particles. Search for indicators of fluid leaks, steel shavings, or damaged elements. Doc each discovering, irrespective of how minor it appears. This meticulous documentation will function a helpful reference all through the restore course of.
Troubleshooting Widespread Issues
A well-organized troubleshooting course of is important. A scientific guidelines is advisable. This method ought to cowl each part and performance of the 6R80. Begin by checking the fluid degree and situation, and examine for any leaks or abnormalities.
- Low Fluid Ranges: Low fluid ranges can result in overheating, part harm, and in the end transmission failure. Frequently test the fluid degree and prime it off as wanted, utilizing the proper sort of transmission fluid.
- Incorrect Fluid Kind: Utilizing the mistaken sort of fluid can result in friction and untimely part put on. Adhere strictly to the producer’s specs for fluid sort and viscosity.
- Broken Valves and Solenoids: Broken valves or solenoids can disrupt the transmission’s operation. Verify for leaks or harm in these elements and substitute them if obligatory.
- Incorrectly Assembled Parts: Incorrect meeting of elements can result in misalignment, friction, and different mechanical points. Comply with the rebuild guide meticulously to make sure correct meeting procedures are adopted.
- Wiring Points: Wiring points can result in management issues. Examine the wiring harness for harm or disconnections. Confirm the correct connection of all wiring to the solenoids and management modules. Pay shut consideration to the proper polarity of connections.
Troubleshooting Examples and Options
Think about the next examples:
| Drawback | Doable Trigger | Resolution |
|---|---|---|
| Transmission slipping | Low fluid degree, broken clutch packs, or worn bands | Verify fluid degree, examine clutch packs for harm, substitute worn bands. |
| Transmission grinding | Incorrectly assembled elements, broken gears, or worn bearings | Disassemble and examine elements, right any meeting errors, substitute broken gears or bearings. |
| Transmission not shifting | Malfunctioning solenoids, wiring issues, or low fluid degree | Examine solenoids for harm, test wiring for issues, and confirm fluid degree. |
A complete understanding of the 6R80’s methods and elements, mixed with a scientific method to troubleshooting, will equip you with the abilities to efficiently rebuild this transmission. Bear in mind, detailed documentation and cautious consideration to element are key to a profitable rebuild.
Sustaining 6R80 Transmission After Rebuild
Giving your freshly rebuilt 6R80 transmission the TLC it deserves is essential for longevity and trouble-free operation. Correct upkeep after a rebuild is sort of a well-maintained engine; it is a preventative measure that considerably reduces the chance of future points. It is your insurance coverage coverage towards expensive repairs down the street.A meticulously maintained 6R80 transmission will ship smoother shifts, improved gas financial system, and extra importantly, present years of reliable service.
The next sections will information you thru the routine upkeep checks and preventative ideas.
Significance of Submit-Rebuild Upkeep
A correctly maintained 6R80 transmission after a rebuild is a testomony to your dedication to high quality. It considerably reduces the chance of untimely put on and tear, guaranteeing the transmission’s efficiency and longevity. This proactive method avoids expensive repairs and retains your automobile working easily.
Routine Upkeep Checks
Common upkeep checks are important for preserving your 6R80 transmission in tip-top form. These checks contain visually inspecting numerous elements and guaranteeing the transmission fluid is on the correct degree and high quality.
- Fluid Stage Verify: Make sure the transmission fluid is on the correct degree. Use the dipstick supplied and prime off as wanted with the proper sort of fluid, following the producer’s specs. This straightforward step prevents low fluid ranges, a typical reason for transmission points. Bear in mind, right fluid ranges are key for clean gear shifts and optimum cooling.
- Fluid Situation Inspection: Verify the transmission fluid for any uncommon discoloration or particles. Darkish, burnt, or metallic-looking fluid would possibly point out inside issues. An everyday fluid change can tremendously prolong the transmission’s life and stop untimely failure. Sustaining the correct fluid is a important step in preventative upkeep.
- Visible Inspection of Parts: Examine the transmission for any indicators of leaks, harm, or uncommon put on. Look carefully for any leaks across the cooler strains, pan, or different elements. Handle any points promptly to forestall additional harm. Common visible checks are an important step in proactive upkeep.
Suggestions for Stopping Future Points
Proactive upkeep is the important thing to avoiding expensive repairs and guaranteeing your 6R80 transmission performs flawlessly.
- Keep away from Harsh Driving: Keep away from sudden acceleration and onerous braking. These driving habits put additional stress on the transmission elements, resulting in untimely put on. Light driving habits can considerably prolong the lifespan of the transmission.
- Use High quality Transmission Fluid: Stick with the advisable transmission fluid sort specified by the producer. Utilizing inferior fluid can result in untimely put on and tear on the transmission. At all times comply with the producer’s pointers for fluid sort and adjustments.
- Common Transmission Fluid Modifications: Schedule common transmission fluid adjustments based mostly on the advisable intervals. Comply with the producer’s pointers, as this will tremendously prolong the transmission’s life and enhance efficiency.
Really useful Upkeep Intervals
The next desk supplies a suggestion for advisable upkeep intervals for a 6R80 transmission. These are normal pointers, and particular intervals would possibly fluctuate based mostly on driving circumstances and automobile use.
| Upkeep Job | Really useful Interval (miles/months) |
|---|---|
| Fluid Stage Verify | Each 1,000 miles/3 months |
| Fluid Situation Inspection | Each 5,000 miles/6 months |
| Visible Inspection | Each 10,000 miles/12 months |
| Transmission Fluid Change | Each 50,000 miles/2 years |
Assets for 6R80 Rebuild Info
Unlocking the secrets and techniques of your 6R80 transmission rebuild journey begins with the fitting sources. Navigating the huge on-line panorama can really feel overwhelming, however with the fitting steering, you may be empowered to make knowledgeable choices and conquer this difficult activity. Discovering credible sources is essential, guaranteeing accuracy and effectivity in your challenge.Dependable on-line sources are important for profitable 6R80 transmission rebuilds.
Info gleaned from these platforms needs to be rigorously scrutinized to keep away from expensive errors. Seek the advice of a wide range of sources, evaluating their accuracy and comprehensiveness, to construct a strong understanding of the method. This method helps make sure you’re not simply following a single perspective, however reasonably integrating various data for a extra well-rounded understanding.
Respected On-line Assets
Quite a few web sites supply helpful details about 6R80 transmission rebuilds. Search for websites maintained by skilled mechanics, respected transmission retailers, or devoted automotive fanatics. These sources usually supply detailed articles, troubleshooting guides, and boards devoted to particular automobile fashions. For instance, some in style websites embrace automotive boards, specialised transmission restore web sites, and technical manuals from respected sources.
Significance of Consulting Dependable Sources, 6r80 rebuild guide pdf
The success of your 6R80 rebuild hinges considerably on the reliability of your data sources. Inaccurate data can result in expensive errors, wasted time, and doubtlessly harm the transmission additional. Rigorously consider the creator’s experience, the positioning’s fame, and the general high quality of the data introduced. Search for websites with clear explanations, detailed diagrams, and a deal with sensible software.
Boards and Communities for 6R80 Rebuild Discussions
On-line boards and communities devoted to 6R80 transmissions supply a wealth of sensible expertise and real-world recommendation. These platforms help you join with different fanatics, share your challenges, and be taught from their experiences. They supply a wonderful alternative to ask questions, get suggestions, and acquire insights into frequent points and options. Some in style boards devoted to transmissions, or automotive boards centered on particular automobiles, might need helpful threads or devoted sections on 6R80 rebuilds.
Evaluating On-line Assets
Totally different on-line sources for 6R80 rebuild data fluctuate of their accuracy and usefulness. Some would possibly supply extremely technical explanations, whereas others present extra simplified summaries. An excellent method is to check completely different sources, search for consistency of their descriptions, and cross-reference data. This cross-referencing course of helps to validate data and ensures that you just’re constructing a stable basis in your rebuild.
Search for clear explanations, detailed illustrations, and well-organized layouts.
Visible Information to 6R80 Transmission Parts
This part dives deep into the inside workings of the 6R80 transmission, breaking down every essential part and its perform. Think about a fancy, intricate machine designed to seamlessly shift gears, all whereas dealing with vital torque. Understanding these elements is essential to profitable rebuilds and preventative upkeep.The 6R80, a classy computerized transmission, boasts a community of interacting elements. Every part performs a significant function in its total perform, from receiving enter energy to delivering it easily to the wheels.
A radical understanding of those elements and their particular capabilities is important for anybody engaged on a 6R80 rebuild.
Overview of the 6R80 Transmission
The 6R80 transmission is a classy system, comprised of quite a few interconnected elements that work collectively to offer clean and environment friendly energy switch. It is a testomony to fashionable engineering, optimizing efficiency whereas sustaining reliability. Understanding its inside structure is paramount for any rebuild or restore.
Principal Parts
The 6R80 transmission consists of a number of important elements, every with a novel perform. These embrace the torque converter, planetary gear units, clutches, and numerous shafts. Correct identification and understanding of those elements are important for profitable rebuilds.
- Torque Converter: The torque converter acts as an important interface between the engine and the transmission. It easily transmits energy, successfully managing torque fluctuations throughout acceleration and deceleration. It is the transmission’s first line of protection towards engine pressure.
- Planetary Gear Units: These are the transmission’s workhorses, answerable for altering gear ratios. Their exact association permits for a number of gear ratios, enabling the transmission to adapt to varied driving circumstances.
- Clutches: Clutches are the mechanical switches of the transmission. They interact and disengage gear units, controlling the stream of energy and enabling clean shifting between gears. They’re the exact management mechanism.
- Shafts: The shafts act because the transmission’s inside highways, carrying the ability between elements. They’re essential for clean transmission of energy from one half to a different, and their situation tremendously impacts total efficiency.
Detailed Diagram
(Think about an in depth diagram right here, if attainable. This could present the torque converter, planetary gear units, clutches, and numerous shafts of their respective positions. Every part needs to be clearly labeled and Artikeld, exhibiting their relationships to at least one one other.)
Inner Mechanisms
The inner mechanisms of the 6R80 are a masterpiece of engineering. The precision and complexity of the elements spotlight the intricacy of the transmission.
- Fluid Dynamics: The transmission fluid performs a important function in lubrication and cooling of the elements. The stream and strain of the fluid instantly affect the operation of the transmission. Correct fluid ranges and high quality are important for clean operation.
- Management Programs: The transmission’s management system directs the engagement and disengagement of clutches, guaranteeing clean shifting. These subtle methods allow the transmission to adapt to driver enter. Understanding the management methods is essential for troubleshooting and restore.
Features of Every Part
Every part of the 6R80 transmission works in live performance to attain the specified consequence: clean, environment friendly gear shifting. This meticulous association of elements ensures a seamless driving expertise.
- Torque Converter: The torque converter smooths the ability switch from the engine to the transmission, lowering pressure on the engine throughout acceleration.
- Planetary Gear Units: Planetary gear units change gear ratios, permitting for numerous speeds and torques to be delivered to the wheels.
- Clutches: Clutches management the engagement of planetary gear units, enabling clean transitions between gears.
- Shafts: Shafts transmit energy from one part to a different, enabling the general operation of the transmission.
