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Diff ratio for 320i M20
Posted: Thu Aug 30, 2007 2:04 pm
by ssornerrad
What ratio is the rear differential on a 1988 320i Convertible?
I'm trying to buy one but there are a few varieties of ratios and sizes.
thanks
Re: Diff ratio for 320i M20
Posted: Thu Aug 30, 2007 2:07 pm
by maxfield
Not sure on standard but 4.1 or 4.27 will be ok, maybe even 3.91.
There are 2 diffs large and small case, either size diff will be fine as you have to adjust the propshaft which I've heard is a piece of piss.
You going LSD or just open diff?
Re: Diff ratio for 320i M20
Posted: Thu Aug 30, 2007 9:30 pm
by marlon
It's 4.10 or 4.45.
You can get them from spares places on the net for about £110 delivered ;)
I know 'cos we were looking to change the screeming knackered 4.10 diff of the 318iS to a 4.45 to improve acceleration.
Re: Diff ratio for 320i M20
Posted: Thu Aug 30, 2007 9:32 pm
by maxfield
£110!
You can get them for around £30-£60 on here.
Re: Diff ratio for 320i M20
Posted: Thu Aug 30, 2007 9:40 pm
by marlon
Cool !!!!
I'll tell my mate as a new diff is needed.......after the engine has been fixed that is
