[timmypstyle]

Originally Posted by glc

I have shifted my 5 speed (3.55 gears, 255/70/16 tires) at 30, 55, and 80. It hits the speed limiter before 4th is wound out. It has never hit the rev limiter. Those shift points are approximately 5200 rpm.
you sure you don't have 4.56's or something? Have you ever calibrated your speedometer and odometer against the highway mileposts? Do you have or can you borrow a GPS?

for GLC... how fast is your speed limiter?

for 4.2l guy, thats insanely slow for those gears. my 3.08 in my 04 heritage was 1st to 40mph at limiter(5400), 2nd to 65 at 5200, 3rd to 90 at 5000, 4th i had up to 108, dont remember rpms but i know at 100mph it was 3600rpms. my 08 with 3.55LS is the same as GLC's, 4th at 100mph is 4000rpms which is also the speed limiter(100mph). you gotta have 4.10s in it or something. plus your tranny might be geared a little closer than ours, could have been changed before you got it if the person only used it for pulling heavy stuff on slow roads where he would only need to go like 35mph or something. also, 4.2L guy, is yours 4x4?