Well, I used to have it memorized, but here goes.
4 to 5 speed is easy, especially since you have the tranny lying there.
Question: Does it have a bellhousing? You'll need that. Good known candidates
- 1980-1981 528i, 633csi, 733i
- 1985 535i
You'll also want to replace the following:
- throwout bearing
- pilot bearing
- crank rear main seal (which you know about already)
Other new parts you'll need:
- E12 5-speed trans support (big metal thing under trans)
- E12 trans rubber mounts (2 of them I think)
- E12 5-speed clutch slave
- E12 5-speed clutch slave hydraulic line
- E12 guibo
You'll need to get your driveshaft shortened. While they do that, they'll want
to rebuild it, which is fine. Should run about $300. I had mine done at some
place in Berkeley. I'll have to look it up, or you can call Bill Arnold at
415.459.2697. Basically, you shorten the front half, I think, 3.75 inches or 99
millimeters, I forget which. Someone on the list can tell you.
It all goes together the way you think it would. Some wacky parts:
1. shift tower - some mix and match here. It mostly all goes together. Now is
the time to do a short shift kit, in whichever manner you choose. You should
also use a bolt at the rear of the platform to attach it to the driveshaft
tunnel, for strength. I can show you mine.
2. clutch line - use the E3 and the E12 lines together to reach the clutch
3. speedo cable needs to be re-routed. It will reach, but just barely.
I'm probably forgetting something, but that's about it.
Michael Harper wrote:
> Dr Bush, I believe, has this memorized. All the way down to how many in/mm
> to shorten the drive shaft.
> Take it away, Dr Bush....
> ----- Original Message -----
> From: "Andrey Yurovsky" <firstname.lastname@example.org>
> To: "LIST - BAVARIA" <email@example.com>
> Sent: Tuesday, September 18, 2001 2:05 PM
> Subject: FAQ's for 4->5sp conversion?
> > I'm looking for FAQ's or articles for the five-speed conversion on a
> > E3. I have a main seal which is leaking a bit plus my transmission is
> > starting to make more noise if the clutch is out, and the clutch should be
> > changed anyway, and I have this 265 5-speed sitting here, so... well, why
> > not.
> > I found this FAQ for an automatic
> > http://rampages.onramp.net/~tomark/FAQ/auto-4.htm but is there something
> > 4->5sp with a parts list and instructions? Thanks,
> > -Andrey