what's a good differential

[joecassie]

i have a s50 with a stock diff its so slow off the line i have a 1986 325e diff what is a good diff to swap in

[MattAvino]

3.73 lsd would be good

[joecassie]

do those come out of an 325is

[mr.vang]

do those come out of an 325is

yes

[joecassie]

only 325is have lsd or do 325i have them too

[Rsully70sev]

ZF or Getrag?

[joecassie]

i have a zf 320 or whatevr came with the 1995 m3

[mr.vang]

only 325is have lsd or do 325i have them too

any e30 can have it since they are so old now, i have seen 2.93 on 325i and 4.10 on eta. but most likely 325is will have 3.73

[justin_l_]

I would go with a 3.25 or a 3.46 if you have the zf. 3.73 is too low for my liking.

[e30rapidic]

my manual cabrio came with a factory 3.73 LSD.

I have a 3.46 LSD behind my S50 and zf transmission. Quick off the line but a bit too many highway RPM's for me. I'm building a 3.15 diff now.

[Rsully70sev]

Yeah 3.73 is too high. I'm going to go with a 3.25 or 3.46. I don't do that much highway driving, but I do make a few long trips every year.

[Robotin]

4.44 is the only way to go...

[Rugbyfan]

my manual cabrio came with a factory 3.73 LSD.

I have a 3.46 LSD behind my S50 and zf transmission. Quick off the line but a bit too many highway RPM's for me. I'm building a 3.15 diff now.

I just found out my 3.25 LSD has a bit of internal play (plus clunk). Would you be looking to sell your 3.46?

[328ijunkie]

3.25

[drulle]

I use 3.25 LSD out of e28 and love it
just swap rear cover and half shaft flanges