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same here..... (archive)

[ Follow Ups ] [ 2002 Message Board ] [ Msg. Board FAQ ]

Posted by Allen on June 29, 2001 at 09:37:58:

In Reply to: 3:90 to 1 = about 3700 @ 65 & 4100 @ 80 on Hwy. posted by K.C.K. on June 29, 2001 at 07:26:28:

I use 5th for o/d only, but it is needed with the 3.9 diff on the highway to keep up with traffic at 75-80mph. I couldn't even hear myself think above the engine whine at those speeds!

The diff is the only part that will effect acceleration, the 5spd 1st gear is taller than the 4spd, so the 5sp is probably a little slower off the line (using the same diff).

Thats why I run a 5 speed. I live in the south so speeds are up on the hwy, 75 to 80 average speed of most traffic. I also track my car when I can which means 1.5 to 6 hrs. at 4100. With a 5 speed I turn about 3400 @ 80 which equals about 4 more miles per gallon. If you are doing auto cross and around town 4 speed is plenty.
Stage 2 02

We were planning on swapping both the 5 speed and the 390lsd into the 02, but the more i think about this the more i thing we dont need the 5 speed. SOOOOOOO, all you guys with the overdrive 5 speed, does it noticeably improve acceleration? or is it simply that, overdrive? seeme like we could save alot of valueable time and money just swapping in the lsd and leaving the 4 speed, since we'll only need it for the auto x and one drag.



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