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Old 01-06-2009, 01:04 PM   #16
SpeedDemon
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Join Date: Jul 2003
Location: Seattle
Posts: 1,939
My Ride: 08 M3/05 ZHP/08 R32
Quote:
Originally Posted by lacrosseguy017 View Post
hey, if i were to convert my auto trans in a 323i to a 5-spd, would i have to get a new diff or would the stock one still work for it?
Your stock one would work decently. You'd have a 3.46 final drive which would mean that you'd be spinning at about 4000 RPMs when you're doing 80MPH. Most people prefer a 3.07, 3.23, or a 3.38 on a daily driven 5-speed. Even a 3.38 can be fairly aggressive for a 5-speed.
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