Supercrewzin01

At 60 mph, the engine is running at 2000 rpms. What is everyone running at 60 mph with 3.73's and 4.10's?

I bought the car used, so I have no idea what gear is in it.

kzonts

I have a 4.0 V6 auto and just put in 3.73's today. I'm sure your car may be totally different, but thought I would express my experience on this. I was worried about this as well and chose the 3.73's.

65MPH = 2250
70MPH = 2500
75MPH = 2700
80MPH = 2900

I would say 4.10's is a good choice. I had 3.31's before I went to 3.73's. It's an improvement, but I think 4.10's would have been better.

Supercrewzin01

They are 3.73's. At 40 mph the rpms are around 1950ish, and if they were 4.10's they would be 200 rpms higher.

Pretty cool, that is one mod I dont have to spend money on.

cliffyk

This may help you sort things out...