Clutch Component Grease
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Use UNIREX S2 (replaces Klueber Microlube GL 261) for the lubrication of splines on the transmission input shaft, lubricating groove of the clutch release bearing, piston rod sleeve, clutch master cylinder and front push rod of the clutch slave cylinder.
UNIREX S2 Grease BMW Part No. 83 23 9 416 138
See S.I. Bulletin 23 01 99 of 2/99.
As of 11/93 the clutch release bearings are available as a replacement part which have plastic sliding sleeves instead of aluminum. Such updated bearings should not be lubricated at all. This applies to all models with manual transmission except for 8 Series models.
See S.I. Bulletin 21 01 94 (3953) of 1/94.