M/T - Modifications
90audi07Subject: Modifications to 5-speed Transmission 01A
Model(s): ALL 80 Quattro/90 Quattro/Coupe Quattro/100 Quattro
Group: 35
Number: 90-01
Date: May 31, 1990
Beginning with transmission 21 07 9, the threaded hole (arrow) in the main shaft, which is used for installing the ball bearing, is discontinued.
When installing the bearing in transmissions without the threaded hole, use tool 3235. The procedure for removing the bearing is unchanged.
Ball bearing, installing in housing
^ push bearing as far as possible onto main shaft
^ install thrust pad A (part of tool 3235) on bearing
^ install 3235 behind clutch plate splines on main shaft
^ press bearing in by turning two bolts B alternately in stages
Note
The ends of bolts B must align with the two depressions in the thrust pad when pressing.
CAUTION
Turn each bolt ONLY a half turn at a time to prevent damage to the bearing.
Oil drilling In main shaft, deleted
Also beginning with transmission 21 07 9, the oil drilling (arrow) for 3rd/4th gear is no longer present in some transmissions.
The needle bearing A to support the main shaft in the transmission housing is then installed without the plastic sleeve B.
If, during repairs, the main shaft is replaced with a shaft that has the oil drilling, the plastic sleeve must be installed.