I've got a tahoe with the 5.3 in it, and was thinking about doing an eaton posi in it. Here's my main question: I've already got 3.73s, and was thinking about doing either 3.90, 4.10, or 4.56 final drive ratio. Which one would you guys suggest, but mainly, how much top end will i lose with the 4.10 rear?

Thanks.

Ben

 

If you want the fastest 1/4 mile et, go with 4.10's. If you are concerned about highway racing just stick to your 3.73's because you will loose top end with some 4.10's.

 

well, i mean, i know im going to lose top end, but how will it affect my daily driving? I don't race on the highways, but i dont wanna be going 70 mph and have it at like 4 grand. What do you guys think?

Ben

 

4.10's are optional on a tahoe. with the 4.10 you should be able to keep the top end you have and your rpm at 70 should be about 2200 instead of 2000. i've driven many with the 4.10, it's what they all should come with.