A/T - 4L30E Planet Gear Indexing
TECHNICAL BULLETIN # 185DATE: AUG. 93
TRANSMISSION: 4L30-E
SUBJECT: Planet Indexing
APPLICATION: BMW, Isuzu, Opel
4L30-E Planet indexing
The 4L30-E uses a planetary gear set that is very similar to the one used in the 3L30 (THM 180).
It can be difficult (if not impossible) to assemble the gear set unless you align the gears first. Each pinion gear has three identifying marks on them, one on one side and two on the other. The marks on the pinions should be lined up as shown.
After lining up the pinions, carefully install the rear sun gear (make sure the pinions are still aligned).
The planetary housing and rear sun gear can now be installed into the case.