View single post by Tsquare

Posted: Sat May 22nd, 2021 08:53 pm

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Tsquare

Joined: Fri Nov 10th, 2017

Location: Suwanee, Georgia USA

Posts: 1540

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I want to get this strait in my head. The truck you are fixing up is the 01 XLT 2WD RC Steppie 3.0 auto Silver w/ 3:70 open diff. You want to put a 4:10 LS under it out of one of the 4x4's you have?

The way I see it the 4:10 will accelerate a little bit quicker but fuel mileage will take a hit. You will be sliding or spinning a tire on tight corners so you will have uneven tire wear. Then there is it the re-programing of the ECU to get the speedometer correct. Any highway driving will have the engine screaming at 75 mph.

Going from 3:70 to 4:10 is not that much of a jump. That is a lot of work for not much gain. I would look for a 3:70 LS chunk or rear axle before I would swap over a 4:10. If it was never going to leave asphalt I would leave the open diff in it.

____________________
Tony
NE ATL
'04 XLT regular cab 3.slo stepside
Semi retirement