HELP! Just picked up my e28 lsd, e30 back plate wont match..

[turk]

If i have bought an e28 large case lsd accidentally what are my options for fitting to my e30? I have removed the back plates off of both, to look at the actual diffs look about the same size... the plate off my e30 is clearlt too small for the lsd...


what do i do???

[gareth]

can you put some pics up?

[turk]

Yeh this is the LSD,




This is what i think is a medium case



And these r the back plates... lsd ones bolt holes only just off the other ones...

[e21Jason]

Large case only fit an e30 with a major amount of fabrication
Jason

[turk]

Is this a large case then I can't tell

[DanThe]

Yes, its a 210 diff, 188 is the largest that will fit an E30 without modifying the rear beam

[SCOTT325SE]

There are, in esscence, three sizes of diff that you ave to choose from
Small case
Medium Case (188 casing like came off your car)
Large Case (210 casing like came off that E28)

Medium case is the largest you can fit to your car without modifying the beam as DanThe quite rightly said. You CAN fit a large case, but to be honest, its not worth the ballache!
The internals from that diff are no good to you either, as, as you can see the crown wheel and pinion are too big to be transplanted. You will need a smaller casing diff unfortunately.

[turk]

Thanks chaps, the knowledge of zoners never fails to amaze me!

ok, so going with a medium case (188) casing, which is the tallest ratio diff I can get? I need ideally 3.25 or there abouts...

all herlp appreciated!

Ps, anyone need a large case 3.07 LSD? HAHA

[rob_htid]

I have a 3.64 medium case LSD il swap you?

[The_Diddler]

I have a 2.93 medium case in my M60, no idea what car it came from though.

My 2.93 LSD came from a 1984 525E

[turk]

how many miles has it covered??? i have an open 3.73 and that gives me ridonculous revs at 70/80mph...

interesting proposition! out of curiosity what r u gonna use it in?

[rob_htid]

The car has coverd 126k but I had it rebuilt due to whineing about 2k ago. It has been sat in the garage for over a year now. It will be going into e30 il just have to fabricate the rear beam to mount it

[turk]

ok kewl, what do u have on ur e30 at present/ cuz ideally i need a taller ratio... dont as u dont get

Can u pm me some pix?

[DanThe]

Loads of 188 ratios, unfortunately most are in non compatible cases so the internals will need rebuilding into your case

Off the top of my head - 2.93 - 3.07 - 3.15 - 3.23 - 3.25 - 3.38

[rob_htid]

It's sat in the garage with a car attatched to it! I can get some pics if your interested but it does just look like a diff lol

[gareth]

M3's had 3.15 and / or 3.25 AFAIK and would be a bolt on swap.
ratios wise, E25 525e (2.93) and auto 325's would be worth looking at. not sure on the ratios of the auto 325i's but they must have been in the low 3.xx's

if you can get a good M3 LSD, that's be a good plan as otherwise you can swap the ratios over but it will need building up properly with the gear meshing, bearing preaload and lash all setting correctly.

if you do find the ratios you need and a medium case LSD, i can build it up, refresh the LSD pack if needed (i can also upgrade the locking while i'm at it ) and replace seals and bearings etc for you.

[craz_azn]

Do you guys have 325e's over there? Those have 2.93 ratio diffs... here in America they come with 2.79 for early models, and 2.93 for later models. That would be a bolt on solution. And, as mentioned, e28 5er diffs will fit as long as it is Type188... they came with low ratios too (2.93, 3.15, 3.25 etc)

Our auto 325s came with 3.73s, not sure if your eurospec 3ers come with lower ratios...

[turk]

Thanx for all the info guys. I may take u up on that offer Gareth. Think I might have found a 3.25 LSD. Waiting to heat from the guy. Keep u all posted.

[turk]

rob_htid, U have a PM