Transmission Slipping out of gear

[kenelba]

1990 535
Manual Transmission
Shift Kit
120,000 miles

Recently, the transmission jumps out of first gear. If I shift 1 to 2 and back a few times, it almost always works. Thinking it is shifting fork.
What are my options? Used, rebuilt, transmission shop, etc.

[Ferret]

Is it jumping violently?

Get the transmission oil changed for a good quality well known brand, and see if it keeps doing it.

If it keeps doing it it's probably the synchromesh on first has collapsed...

[bill g]

Also make sure engine and transmission mounts are good - excessive movement can cause jumping out of gear on some cars. I have not had this happen with BMWs specifically though.

Bill G

[WarrenBrown]

Check the linkage to make sure it isn't being blocked.
Nearly 100% that it is the shift forks.

Had the problem with my 318is, got a used trans from a junk yard, it poped out of different gears. Ended up rebuilding the original.

Found some good info on the Metric Mechanic site.

Warren
88 325iX
91 318is
95 525iT