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T5 build up ?

1.9K views 31 replies 7 participants last post by  JIMS SVT  
JIMS SVT said:
Would I need to change to a 4.88 also?With the .63 5th would it be about the same as a .68 and the 4.56?
Yeah, they're almost identical:

.63 * 4.88 = 3.07
.68 * 4.56 = 3.10

How high do you rev your engine? At 115 mph, you'll be turning around 7400 rpm in 4th gear with 4.88's or 6900 with 4.56's.