diff swap question [Archive] - Bimmerfest - BMW Forums

: diff swap question

01-16-2006, 09:44 AM
my roommate just picked up an e30 with a 3.73 in it. i've always wanted a 3.73, rather than my 3.23. he said he would trade me diffs. the thing is, his car has a newer m50 in it, but the body and diff have almost 200k miles. is this not smart to swap because of the high mileage? thanks.