Will an e30 LSD bolt into a 2002?

[tdk930]

Will an e30 LSD bolt into a 2002?

[JsnPpp]

Hi,

I can't comment b/c I haven't explored e30 diffs, but was just reading this thread:

http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,352937/start,0/postdays,0/postorder,asc/highlight,e30%2Bdiff%2B2002haus/

~Jason

[Guest Anonymous]

Will an e30 LSD bolt into a 2002?

check this out. He swapped the internals of an e30 diff to a 2002 case.

http://www.bmw2002faq.com/component/option,com_forum/Itemid,50/page,viewtopic/t,354039/start,120/

[TobyB]

no

http://www.bmw2002faq.com/component/option,com_forum/Itemid,50/page,viewtopic/t,352937/

[tim385]

Any thing will fit ...its just ...time,money, fabrication, headaches, sore knuckles , crying children, unhappy wife , miserable life ..Ha Ha .

[qdessa]

The swap looks like the cheapest and quickest way to a LSD. E21 diffs are hard to find. Even E30s are disappearing from the junk yards around my way.

The only downside ( if it can be considered that ) is you keep the stock gear ratio.

[Fishhead]

I just did this swap in my 02.

I used the E30 LSD unit (small case- 6 bolt rear cover) and put my stock 02 ring gear on it (3.64 ratio). My 02 is a 1974 and the stub axles were smaller diameter and had a different spline than the E30 LSD did, but I had a non-LSD E21 diff with the same splines as the E30 LSD that I used the stub axles out of. I made up 2 X 1/4 inch spacers and drilled the E21 stub axles for the 8mm bolts (longer allen bolts too).

In Duetchmans link above, he used the stub axles out of the 02. My guess is that his diff was out of a later car(76) as he didnt use the spacers that I needed. (cupped stub axles as apposed to the flat stub axles ?-mine were E21 and the flat variety)

Also in Duetchmans link, I posted another link where an E36 LSD unit was put in an E21 case and the case needed to be clearanced to get the LSD into the case.I thought I would have to clearance my case also. Instead of clearancing my case for the LSD, I just removed the bearing/stub on the ring gear side by taking out the 8 allen bolts that compresses the LSD clutches, put the ring gear/ LSD assembly in and then put the bearing/stub inside the case and put the LSD unit back together inside the case. No clearancing needed. I used the 02 bearing retainers,E30 LSD, E21 stubaxles and the 02 diff case and it all works like it should.

[AceAndrew]

^ What are you planning to do for cooling, I see that as being a big potential issue.

[andrey]

Junkyard parts? Eh...

http://www.quaife.co.uk/shop/products/qdf4n-1

; )

[Fishhead]

^ What are you planning to do for cooling, I see that as being a big potential issue.

Please elaborate..

[Fishhead]

^ What are you planning to do for cooling, I see that as being a big potential issue.

Please elaborate..

Can anyone else explain why the E30 LSD unit in the 02 diff case can/may/could/will "cause" an overheating issue?

Anyone?

[TobyB]

it won't...

... if you get it in there, it will be fine.

t

[ToddK]

Just throwing this out there. I have a really clean e30 small case LSD I'd let go for $200 plus shipping. I took it in trade and have no real use for it. All ready have several E21 LSDs on the shelf. Ratio is 3.91 to one, and shipping is from Carver Mass 02330. tkishbach@comcast dot net

[Fishhead]

Thanks, Toby..

The diff now has about 400 miles on it and all is fine. No noises, no overheating...

[kbmb02]

^ What are you planning to do for cooling, I see that as being a big potential issue.

Please elaborate..

Can anyone else explain why the E30 LSD unit in the 02 diff case can/may/could/will "cause" an overheating issue?

Confirming with Toby . . . it's not an issue (not sure what AA was thinking). -KB