Topic: Driveline & Transmission

ZF S5D-320Z 5-Speed Detent Pins

Article by: Vinci & mplazz Article applies to: all models with the ZF S5D 320Z 5-speed manual transmission. Introduction: This guide covers the process of replacing and updating the shift pins of the ZF S5D 320Z 5-speed manual transmission used in many of the BMW 6-cylinder models. This is a […]

Gear Selector Shaft Seal

Article By: Ralph (Dutch740) Applies to: Models with automatic transmissions and specifically to models with the A5S560Z / 5HP30 transmission (i.e. 740i)  maybe 730i V8 as well (?) Problem: Automatic transmission leaks fluid from the selector shaft, and you slowly lose your (very expensive) transmission oil. Fix: Replace the seals […]

3.15 Limited Slip Diff Retrofit

Article by: Olin Johnston Article applies to: written for the e31 but applies to the e32, e34, e38, and e38 models as well. The donor car was an early E32 750iL. I bought it already cleaned and drained. It went into my US 1994 840Ci with a stock 2.93 open […]

LSD Final Drive Disassembly

Article by: Binjammin Applies to: Most BMW models with a limited slip differential. So I had this extra rear laying around, I decided to check out the condition of it and clean it up. Turns out it’s in nice shape, could maybe use new clutches but I’ll see if I […]

Driveshaft Center Bearing

Article by: Sean Article applies to: all BMW models. Problem: Lots of them. What else did you think? It started with vibrations from 0-60 km/h (0-40 mph) under mild or hard acceleration, highway speeds no problem. Later it became a knocking, thumping and clunking sound from underneath the car (located […]