325sport lsd on a 318 is

[luke123]

hi every one i am new to the bmw world picking up my 318 is tomorow
just wondering what dort of lsd to get and if the 325sport lsd would bolt straight on thanks luke.

[Alyman]

It's a larger case diff than the one you'll have at the moment so I think you'd have to swap the driveshafts too (I stand to be corrected on that though...).

Also worth noting that it'll shave a bit off your acceleration. IIRC the iS open diff has a ratio of 4.1 as standard whereas the sport ratios are 3.64 (prefacelift/tech1) and 3.91 (facelift/tech2).

An LSD was an option on the iS so from time to time they crop up second hand (small case, 4.1 ratio) but seeing as they're rare they command a higher price usually.

[jmc330i]

It's a larger case diff than the one you'll have at the moment so I think you'd have to swap the driveshafts too (I stand to be corrected on that though...).

No, it will bolt straight in as it is, no swapping of driveshafts or output flanges.

I changed to a 3.91 lsd on my touring when it was a 318i (from a 4.27 diff), it was much better for cruising around and general everyday driving, but it did feel a little slower acceleration wise - not that it made much difference, it was an M40, so slow to begin with!

I doubt you would notice much of a difference going from 4.10 to 3.91, other than slightly lower revs when cruising at 60mph for example. A 3.64 would be quite a jump I would guess.

[jaistanley]

Yea, I agree. the 3.91 diff will be barely noticable compared the to standard 4.1.

That said, I have a 4.1 LSD (medium cased) that I might be persueded to part with....

[luke123]

thanks guys also what are the lsd's like how gould are they i dont want to be a drift boy but woul be nice to get a bit sideways now and again thanks luke