![](https://motoinstruction.ru/img/bmw/21/127284.jpg)
Disassembling output shaft
Caution: To avoid damaging the needle roller bearing on the splines, spread the rollers carefully at the end face when removing.
![](https://motoinstruction.ru/img/bmw/21/127285.jpg)
- Use universal puller, BMW No. 007500, to remove grooved ball bearing (19) together with shift gearwheel for 1st gear (17) and shim (18).
- Remove needle roller bearing (16).
- Remove the sliding gearwheel for 4th gear (7).
- Remove circlip (8), backup washer (9), shift gearwheel for 3rd gear (10) and needle roller bearing (11).
- Remove 5th stage spur gear (12) of reverser.
- Remove circlip (13) and sliding gearwheel for 5th gear (14).
- Turn output shaft (6) other way round and clamp into the vise with soft jaws.
- Use universal puller, BMW No. 00 7 500, to pull off grooved ball bearing (1).
- Remove shim washer (2), needle roller bearing (3), shift gearwheel for 2nd gear (4) and thrust washer (5).
![](https://motoinstruction.ru/img/bmw/21/127286.jpg)
Assembling output shaft
Note: Begin by installing 5th stage spur gear (12) of reverser.
- Before assembly, oil all friction faces lightly with gear oil.
![](https://motoinstruction.ru/img/bmw/21/127287.jpg)
- Clamp the output shaft into the vise with soft jaws and with the splined end up.
- Install circlip (13/arrow).
Caution: To avoid damaging the needle roller bearing on the splines when installing, spread the rollers carefully at the end face.
- Install 5th stage spur gear (12) with narrow collar toward circlip.
- Install needle roller bearing (11).
- Install shift gearwheel for 3rd gear (10) with pockets facing away from the 5th stage spur gear (12).
- Install backup washer (9) and circlip (8).
- After installing shift gearwheel for 3rd gear, measure endplay.
- Install shift wheel for 4th gear (7) with recess for shift fork facing towards the 3rd gear shift wheel (10).
- Install backup washer (15) and needle roller bearing (16).
- Install shift wheel for 1st gear (17) with the pockets facing towards the 4th gear shift wheel (7).
- Install spacing washer (18) and grooved ball bearing (19).
- After installing, check endplay at 1st gear shift wheel.
See below.
![](https://motoinstruction.ru/img/bmw/21/127288.jpg)
- Reverse position of output shaft (6) in vise.
- Install sliding gearwheel for 5th gear (14) with the recess for the selector fork facing the 2nd gear shift wheel (4).
- Install backup washer (5) and needle roller bearing (3).
- Install the shift wheel for 2nd gear (4) with the dogs facing the 5th gear sliding gearwheel (14).
- Check/adjust fully-compressed length.
See below.
- Install spacing washer (2) of the determined thickness, and press on deep-groove ball bearing (1).
- Check 2nd gear endplay.
![](https://motoinstruction.ru/img/bmw/21/127289.jpg)