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009 trans fluids and service
- 2. Transmission Fluids ATF (Automatic Transmission Fluid) must do the following: ◦ Transfer energy ◦ Lubricate ◦ Trap contaminates ◦ Clean internal parts
- 3. Additives in ATF provide additional protection ◦ Dispersants/detergents Keep parts moving and clean ◦ Friction modifiers Change the fluids coefficient of friction ◦ Seal swellers Keeps seals pliable and swelled to compensate for wear ◦ Foam inhibitors Prevent air bubbles from forming Transmission Fluids
- 4. Transmission Fluids Heat kills ATF!
- 5. Current ATF Types – Chrysler ATF+3 – Chrysler ATF+4 – Ford MERCON® – Ford MERCON® V – GM DEXRON®-III – Toyota T-IV – Honda Z-1 – Nissan Matic-J – Hyundai SP-III Low Viscosity − M-B NAG-2 − Ford MERCON® SP − Ford NGF − GM DEXRON®-VI − Toyota WS Standard Viscosity
- 6. ATF Level/Condition Check This if your first and most important inspection! ◦ Check fluid level ◦ Check condition Particles Mileage/use ◦ Color Burnt, milkshake
- 7. ATF Level Check Allowable Max. level when ATF is hot Allowable Min. level when ATF is hot Allowable Max. level when ATF is cool Allowable Min. level when ATF is cool Fluid level must be within this range when ATF is hot To be used as a reference COOLHOT Overflow Plug Proper Level Overflow Type Dipstick Type 7
- 8. ATF Level To check the ATF the following condition must be present Engine at normal operating temperature Parked on level ground Vehicle in Park or Neutral Check with Dip Stick pointed down in good light
- 9. Fluid Condition (External) Does this fluid color indicate a problem? 9
- 10. ATF Level Dip Stick Type At or above the ADD mark is ok For preliminary road test.
- 11. Stand Pipe ATF Level ATF Level Check • Scan tool connected & monitor TFT • When trans temperature reaches specification… • Fill until fluid just dribbles out of stand pipe
- 12. Dodge ATF check Chrysler vehicles with the NAG 1 transmissions have the tube…but NO Dip Stick You must use special tool and scan tool to set level correctly
- 13. G.M. Side Cover Fluid Storage
- 14. G.M. Side Cover Fluid Storage
- 15. ATF Level and Differential Separate Differential Oil ?
- 16. Transmission Services Before any service is performed… How to road test ROAD TEST VEHICLE!! Some customers will not tell you if transmission has concern prior to service. • Engagement feel in all gears • Light throttle shift points • Heavy throttle shift points • Passing gear/Kick Down • Coast down downshifts • Manual gears/engine braking • Torque Converter Clutch (TCC) engagement
- 17. Transmission Services Drain and Fill ◦ Drop transmission pan ◦ Replace transmission filter and gasket if needed ◦ Adjust bands if needed ◦ Drain torque converter if possible ◦ Fill with fluid Approx. 4-6 quarts
- 18. Dropping the Pan
- 19. Dropping the Pan
- 20. Dropping the Pan
- 21. Virgin Plug
- 22. Pan Magnet Normal: Clean & service Trans Failure: Need to diagnose
- 23. While it’s on the rack… Vacuum Modulator Shift Linkage
- 24. Transmission Service Cont’d Phone call??????
- 25. Reassembly Replace Filter Seal/Gasket “Peen” pan bolt holes Clean magnet Replace gasket if needed & torque bolts
- 26. Band Adjustment • Not very common • Not all bands are externally adjustable • Common R.O.T. • Torque to XX Inch pounds • Back off 1 ½ - 2 turns • If you do adjust bands…. REPLACE LOCK NUTS
- 27. Reassembly Cutting the filter open ◦ Can let you know if there is possible cause for concern ◦ Not done every time This filter was from a car who just had a “Trans Flush”!
- 28. Transmission “Flush” Machines • Machine does NOT FLUSH transmission • Machine is a fluid exchanger • Allows fluid in COOLER and TORQUE CONVERTER to be exchanged • Filter should be changed before exchange • Avoid use of “Snake Oils”
- 29. Lab Demo
- 30. #1 • Identify the transmission by the shape of the pan and number of pan bolts. 1 Aluminum Powerglide 14 bolts 2 TH200 Metric 11 bolts 3 TH350 13 bolts 4 TH400 13 bolts 5 TH200-4R 16 bolts 6 TH700-R4, 4L60, 4L60E 16 bolts 7 4L80E 17 bolts
- 31. #2 • Door Sticker
- 33. Always check the RPO (Regular Production Order) any time your are working on GM/Chevrolet vehicles The RPO will tell you, once decoded, what the transmission is and any other options on vehicle.
- 34. Early days… • Dodge Torque Flight 727 • GM Turbo-Hydromatic • GM Powerglide • Ford C4 • Ford C6 Now Days… • Dodge 46RE • GM 4L60E • Ford 4R70W
- 35. 1st character • Number of forward speeds 2nd • L- Longitudual, T- Transverse, M- Manual 3rd • Relative Torque Capacity with 10 the smallest and optional digit A- All wheel drive, E- Electronic controls, HD- Heavy duty
- 36. 1st character • Number of forward speeds 2nd • A- Automatic, C- Chain, D- Drive, E- Electronic, F- FWD, HD- Heavy duty, L- Lock-up, N- Nonsynchronous, S- Synchronous, O- Overdrive, W- Wide Ratio, X-Transaxle 3rd • Torque capacity in Ft. Lbs. 44=440Ft. Lbs.
- 37. 1st character • Number of forward speeds 2nd • Relative Torque Capacity with 0 the smallest and 10 the largest 3rd • A- AWD, R- RWD, L- Longitudinal, T- Transverse 4th • Type of shift control: H- Hydraulic, E- Electronic, FE- Fully electronic.
Editor's Notes
- Before proceeding with the test drive it is important to verify fluid level and condition. ATF is the life blood of the transmission and serves several important roles. Checking the fluid prior to the test drive ensures the transmission will not be damaged during the test drive and may provide important diagnostic clues. Late model Toyota vehicles employ two types of transmissions with different ways for checking and adjusting ATF level: Conventional Dipstick Type (Left) Overflow Type (Right) For both types, it is important to ensure proper fluid temperature when checking fluid level. This is especially important while checking the overflow type transmission. These transmissions have a set temperature range to observe fluid trickle from the overflow tube. Common practice for overflow type transmissions is to verify no external leaks prior to test drive. Fluid adjustment is considered a repair attempt.
- In the past, technicians relied on fluid color to determine condition. This practice is no longer valid for fluid condition diagnosis. The chemical formulations of new ATF types, the removal of asbestos from friction materials, and the addition of resin contribute to changes in color of normal-condition fluids. A dark clear brown or dark clear red fluid color does not by itself indicate a failed unit. To get a better indication of fluid condition, place a sample of the fluid on a white paper towel. Any of the following fluid sample conditions may indicate a problem internal to the transmission. The need to replace the transmission, however, cannot be determined based on fluid condition alone. Residue or flaky particles of metal or friction material. Heavily varnished fluid which is tacky and no longer clear. Milky appearing fluid caused by engine coolant or other liquids entering the transmission. Coolant may cause friction materials to loosen from the clutch and brake plates and the torque converter lock-up clutch. Do not install a replacement unit until the cause of the coolant leak is found and corrected, and the ATF cooler is flushed.