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  1. E36 diff differences 
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    My 323 has a standard open diff with 6 bolt output flanges.

    I bought a medium case 325/8 LSD. When trying to fit it, the 6 bolt holes don't line up with the 6 holes on the driveshafts. The output flanges on the LSD are slightly larger diameter than the open diff and thus, the bolt holes are slightly further apart aswell.

    Why? What differences were there in these medium case diffs? I though the only difference was the M3 input / output flanges with the M3 output being of 8 bolt orientation?

    What is the solution? I could change the output flanges over from my open diff, but having already filled and fitted the LSD, i'd really rather not. Can I get 325/8 driveshafts? Will they fit my hubs?

    Help please.
     
     

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    Quote Originally Posted by Mark_F View Post
    My 323 has a standard open diff with 6 bolt output flanges.

    I bought a medium case 325/8 LSD. When trying to fit it, the 6 bolt holes don't line up with the 6 holes on the driveshafts. The output flanges on the LSD are slightly larger diameter than the open diff and thus, the bolt holes are slightly further apart aswell.

    Why? What differences were there in these medium case diffs? I though the only difference was the M3 input / output flanges with the M3 output being of 8 bolt orientation?

    What is the solution? I could change the output flanges over from my open diff, but having already filled and fitted the LSD, i'd really rather not. Can I get 325/8 driveshafts? Will they fit my hubs?

    Help please.
    TBH Mark, the easiest way are to use your output flanges mate. You will have to drain the diff again, but you can change the flanges with the diff in situ. The driveshafts will just dangle and give enough clearance....
    make sure you only do one flange at a time, but they just tap out with a long screwdriver....
    Then you will be able to keep your driveshafts. I would avoid trying to get them out of the rear hubs as they can be a fookin mare if they are siezed into the wheel bearing...
     
     

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    Mark_F (22-06-2010)

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    Agreed, swapping the shafts can be a nightmare. Its no biggie at the end of the day, even if I had to drop the diff out again.

    I was just annoyed as I thought I'd done enough research to avoid any holdups.
     
     

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    Quote Originally Posted by Mark_F View Post
    Agreed, swapping the shafts can be a nightmare. Its no biggie at the end of the day, even if I had to drop the diff out again.

    I was just annoyed as I thought I'd done enough research to avoid any holdups.
    These things are sent to try us mark..
    Seriously mate, You might as well leave the diff in situ. IIRC the 323 and 320s use slightly smaller shafts. Rjb328 had to swap his output flanges into his 328 diff when he did the engine conversion...
     
     

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    thanks for the post up on this mate i was looking into putting an 2.5 lsd in my 328i coupe and been looking for days for an answer about flanges so basicly m8 it fits in the cradle but the flanges are different in stud hole space is that right m8? by the way sorry to intrude on your post but everyone needs an lsd
     
     

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    Quote Originally Posted by bmwe36violet View Post
    thanks for the post up on this mate i was looking into putting an 2.5 lsd in my 328i coupe and been looking for days for an answer about flanges so basicly m8 it fits in the cradle but the flanges are different in stud hole space is that right m8? by the way sorry to intrude on your post but everyone needs an lsd
    As yours is a 328 Im pretty sure the output flanges are the same as the 325/M3 3.0 Lsd. The input flange may need swapping from the 6 bolt M3 to the 4 bolt on the 328. These swap over after the big nut has been undone. But they must be marked and put back in the same postion. Not a problem though...
     
     

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    Quote Originally Posted by steve23002 View Post
    As yours is a 328 Im pretty sure the output flanges are the same as the 325/M3 3.0 Lsd. The input flange may need swapping from the 6 bolt M3 to the 4 bolt on the 328. These swap over after the big nut has been undone. But they must be marked and put back in the same postion. Not a problem though...
    ahhhh great m8 asked a bmw specialist other day he said theres alot of work in getting these to fit it boils down in the end how much money you want to spend in labour lol but im very mechanicly minded and can turn my nose to anything so if its just flanges thats a doddle and thanks again to you both
     
     

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    Quote Originally Posted by bmwe36violet View Post
    ahhhh great m8 asked a bmw specialist other day he said theres alot of work in getting these to fit it boils down in the end how much money you want to spend in labour lol but im very mechanicly minded and can turn my nose to anything so if its just flanges thats a doddle and thanks again to you both
    Just make sure you DONT get the M3 evo diff. They require a prop and rear subfame change...
     
     

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    Quote Originally Posted by steve23002 View Post
    Just make sure you DONT get the M3 evo diff. They require a prop and rear subfame change...
    right ok mate 3.0l or the 2.5 diff or obviosly a 328i one lol think the 2.5s are marked with an s on the top of them do u know what i need to look out for on the 3.0 ones like stampings on the case?
     
     

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    Sounds good chaps.

    With regards to Fluid, with the diff on the deck, I expected it to take 1.2L before it began to overflow. It took 1.6 before I looked under it to see if it was leaking. At that point I stopped filling it. I leaned it back a bit and it began to trickle from the filler. So I assume its neigh on "full" as is.

    PS, if you DO need to swap flanges;



    Smile.
     
     

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