Place the secondary shaft with the 2nd gear pinion on a press and press the speedometer drive pinion, thrust washer, reverse gear pinion, spacer sleeve, needle bearing, 1st gear pinion, 1st gear synchronizer locking ring, 1st and 2nd gear synchronizer sliding sleeve with hub and 2nd gear synchronizer locking ring, needle bearing and 2nd gear pinion off the shaft.
Clean the parts and check their condition, replace defective or badly worn parts.
Note: The intermediate shaft rear bearing can only be removed after the gearbox housing rear cover has been heated.
(The original text can be read on the website: BMWMAN.RU)