TORQUE CONVERTER
The torque converter is equipped with a lock-up clutch. The closing (application) of the lock-up clutch is determined by the engine load and speed, and produces very little vibration. The lock-up clutch drives 3rd, 4th and 5th gears mechanically, independent of slip.
| CAUTION | Before installing the transmission, check the installation dimension of the torque converter. See . |
- Pay attention to the rules of cleanliness when working on the automatic transmission. See «Rules Of Cleanliness For Working On Automatic Transmissions»(ref-172633-S32196432842005030200000) .
- Repair instructions. See «GENERAL REPAIR INSTRUCTIONS»(ref-172633-S29762831402005030200000) .
- Apply a thin coat of ATF to the seals. Other lubricants result in operating problems of the hydraulic transmission controls.
Scheme 364
TORQUE CONVERTER, IDENTIFICATION
Different torque converters exist. Identify by the code (arrow). (Scheme 365)
Scheme 365
Allocation torque converter/transmission. See CODE LETTERS, ENGINE/TRANSMISSION APPLICATIONS, RATIOS, EQUIPMENT .
TORQUE CONVERTER, CHECKING
Examine hub -arrow- of torque converter for traces of wear. (Scheme 366)
Scheme 366
Note. The torque converter is welded and must be replaced complete if damaged or faulty.
Torque Converter Draining
If the ATF is soiled due to shavings or during fundamental reconditioning of the transmission, the torque converter must be emptied
Siphon ATF from torque converter using VAG1358A and VAG1358A/1. (Scheme 367)
Scheme 367
Tightening Drive Pinion Nut And Adjusting Friction Torque
Thread in two hex head bolts M8 x 30 -A-. see scheme 58
When nut is tightened, final drive must be supported (e.g. using VAG 1359/2 universal mount together with VAG 1383A transmission hoist).
Note. Increase torque slowly and measure friction torque multiple times. If the specified friction torque is surpassed, replace spacer sleeve and repeat adjustment! Any spacer sleeve that has been pressed together too far one time must be replaced.
Measuring Friction Torque
With torque gauge, 0 to 600 Ncm, locally available. see scheme 72
Scheme 368
Note. If necessary use 3/4" to 1/2" reducing piece.
Adjust to following friction torque. see scheme 73
Scheme 369
Measuring Friction Torque (Check Measurement, Ring Gear)
- Drive pinion removed
- Differential installed with shims "S1*" and "S2*"
Torque gauge 0 to 600 Ncm -A- installed on differential. see scheme 92
Scheme 370
Read friction torque.
Friction torque specified values. See RING GEAR FRICTION TORQUE table.
| Bearing Application | Ncm |
|---|---|
| New Bearing | 13.3-26.6 (150-300) |
| Run-In Bearing (1) | 2.66-5.31 (30-60) |
| (1) At least 50 km. | |
| (1) | At least 50 km. |
RING GEAR FRICTION TORQUE
- Tapered roller bearings for differential are low-friction bearings. Therefore friction torque can only be used for check measurement in a limited way. A correct adjustment is only possible by determining the total thickness "S total ".
- Do not grease new tapered roller bearings additionally for friction torque measurement. The bearings are already greased with a special oil from the factory.
- For a new adjustment of the gear set, the drive pinion adjustment must now be performed with checks. See «DRIVE PINION, ADJUSTING»(ref-172633-S00793257452005030200000) .