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new2bmw

07-22-2010 01:46 AM

what diff should i use?

I have an 84 318i auto. I am not sure what diff it came with , i think maybe 3.84? I also have a 325i manual parts car, no idea what it would have in it. Which diff will give me the best results, the one that came with the 318i or the one from the 325i.
thanks

E30M42cab

07-22-2010 12:23 PM

Your best option would be the 4.10 open diff i have in my garage waiting for a buyer;)

nonlocal

07-22-2010 07:30 PM

Quote:

Originally Posted by E30M42cab (Post 1438660)

Your best option would be the 4.10 open diff i have in my garage waiting for a buyer;)

He might be whoring, but he's not wrong. Putting the lower ratio diff from a 325 in your m10-powered 318i is going to make it aaaawwwwffffuuuulllyyy slooooow.

The 4.10 will help you reach highway speed the same day you enter the onramp...

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