325i LSD on to a 318i cab

Post Sun Sep 24, 2006 2:06 pm

as above will it be easy to fit a LSD from a 325 on to my cab as i will be looking to change my engine soon

my car is a 318i cab with a auto box is the original diff a lsd as it a auto or not?

also if i put the 325i lsd on my car now and drive it with thaty diff on will it cause any problems?

Post Sun Sep 24, 2006 2:40 pm

318i auto would most likely have an open diff.

The 325i diff will fit fine - straight swap.

I think the 318i auto has a 4.10 (maybe a 4.45) diff, so it should drive fine. The drop between 4.45 and 3.91 shouldnt be too much, although it might slow the 318i acceleration a bit.

Post Sun Sep 24, 2006 3:02 pm

oh k ssay if i was to leave the 318i auto diff on with the 325i engine then i wil def have problems so i should really wait till i get my 325i engine

Post Sun Sep 24, 2006 4:15 pm

The small case diff from the 318i wont last long with the 325i engine, unless you drive like an old man on sunday.

I reckon you would be ok with the 3.91lsd from the 325i in your auto, I was going to fit my LSD to my touring 318i manual which had a 4.10 diff.

If it was me, Id change the whole lot in one go - engine, box, prop and diff, Im assuming youre changing to the 325i engine.