he guys,
im currently working on a 1979 bmw 635csi.
i want to chance the differential to a limited slip differential ( LSD)
is there anyone selling a lsd?
or does somebody know a company that sells a lsd for this model?
kind regards,
jelle
To begin with I think you should explain "The Zwolle is in Holland. That will save many of us some time as it will limit the amount of people who can help you. A differential weighs approximately 95 pounds so oveseas shipping is probably out of sorts.Which transmission to you have.? There are 2 that can be. There are different differential ratios. Most of the sideloader differentials, that is how they are referred to, that are appropriate for the pre 82 cars, are a 3.07 ratio. These go hand in hand with a dogleg or close ratio gear box. Should you have a standard overdrive 5 speed gear box a 3:45 ratio differential is more in order. These are less common. I think you should post which gear box you have and and where you are located, then those of us that can help you can reply .
Last edited by Bert Poliakoff; 01-03-2019 at 12:35 PM.
81 Euro undergoing total nut and bolt restoration
pictures at: flickr.com/photos/bertsphotos
Jelle,
Maybe I can help, I'll ask around.
hello,
thanks for your replies.
as bert already said im from zwolle what is a city in the netherlands.
and yes its a "side loader differential"
im not looking for a complete differential, just the differential that is inside the case, i already found new bearings and the right crown and pignon wheels.
so if somebody know if there was fitted original an lsd then i would love to have the oem numbers, or if someone know a second hand or aftermarket lsd thats fine for me too.
hope to hear from you guys!
Side loader LSD's are rare and expensive. Additionally, there are not many ratio options. Most were bought by E9 racers. I swapped out my rear subframe from the e12 chassis to the e28 chassis and this was simple. I then bought an e28 LSD. There are many more ratios and they are far easier to source. Additionally, they run at 50% to 30% the cost of a good sideloader LSD.
1977 633 CSi RHD Euro. S38B38 3.9L M5 Transplant. 5 Speed Getrag Dogleg. 3.73 LSD. 417hp, 369lb/ft
1971 3.0CS E3 2dr Alpina Special Coupe Racer, 347hp, 295lb/ft
wait. what ? an E28 based rear sub-frame will bolt up to E12 based body mounts ? or is there some modification / fabrication involved...
No modification, no fabrication, just a little fiddly. Then you can pick diff ratio's and buy nice and cheap 3.45 LSD's. It was done as part of my S38B38 engine in build. https://www.bimmerforums.com/forum/s...assis-d-633CSi
Edit: a few more shots here. https://www.bimmerforums.com/forum/s...d-633CSi/page2
Last edited by Shipper; 01-20-2019 at 05:00 PM.
1977 633 CSi RHD Euro. S38B38 3.9L M5 Transplant. 5 Speed Getrag Dogleg. 3.73 LSD. 417hp, 369lb/ft
1971 3.0CS E3 2dr Alpina Special Coupe Racer, 347hp, 295lb/ft
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