DIFF PROBLEMS HELP!!!!!!

[jimbob1]

Hi is there anyone out there that might know the difference it would make fitting a 325 diff to my 320 cos mine is f****d and i cant source one for a 320.The diff from the 325 is only 40 quid from a breakers yard a new one from a dealer is 565+vat but ihavn't got that kind of cash to spend if anybody might know where i could get a second hand 320 diff i would be pleased i dont realy want to have to send her to the car park in the sky just yet

[Brianmoooore]

320 diff is small case and 325 is medium case, but they are interchangeable. Drive shafts are the same, and propshaft will fit (unscrew clamping sleeve and fine tune sliding section to fit).
Diff ratio will probably be a bit diferent, depending on whether your car/ donor car is automatic/manuel/touring, but will probably be close enough.
Ratio should be marked on a metel tag attached to one of the rear cover bolts.

[jimbob1]

thanks for that info ill have a look for that tag,me and my dad were wondering wich way the ratio's would work better acceleration or better top speed or niether

[GavinJ]

Where are you based? i know my local salvage place has a 320 in at the moment, thats in Cannock, West Mids....

[Brianmoooore]

Diffs from smaller engined E28 five series fit an E30 as well, if you change over the rear cover and ouput flanges.