Posi & Rear Ratio
Thread Starter
Junior Member
Joined: Dec 2019
Posts: 96
Likes: 1
From: Aurora, OR
Car: 1986 IROC-Z
Engine: 6.0
Transmission: 4L60E
Axle/Gears: 10 Bolt/3.43
Posi & Rear Ratio
Hello,
I have a 4.8 LS that I am putting into my Camaro. I currently have an open diff with 2.73's which would be miserable with the 4.8. The gear ratio I am choosing is a 3.42, as it should be a happy medium for highway/city driving. I am open to suggestions, though.
As for the posi, I was thinking of the different options. I know Auburn units wear out, and, so, the Zexel Torsen units are a good option. However, I have been told to just get a fourth gen rear with 3.42 gears, as it would be easier to swap my LS brakes onto. But finding a rear end with 3.42's and posi is a bit difficult, and not very fairly priced. Am I better off just getting something like the Detroit TrueTrac specifically for my 26 spline rear end and a set of 3.42 gears? A bit expensive, also.
I live in Oregon, so roads are not fantastic and moisture, so I thought a posi would be a good choice for traction.
Thanks!
I have a 4.8 LS that I am putting into my Camaro. I currently have an open diff with 2.73's which would be miserable with the 4.8. The gear ratio I am choosing is a 3.42, as it should be a happy medium for highway/city driving. I am open to suggestions, though.
As for the posi, I was thinking of the different options. I know Auburn units wear out, and, so, the Zexel Torsen units are a good option. However, I have been told to just get a fourth gen rear with 3.42 gears, as it would be easier to swap my LS brakes onto. But finding a rear end with 3.42's and posi is a bit difficult, and not very fairly priced. Am I better off just getting something like the Detroit TrueTrac specifically for my 26 spline rear end and a set of 3.42 gears? A bit expensive, also.
I live in Oregon, so roads are not fantastic and moisture, so I thought a posi would be a good choice for traction.
Thanks!
Supreme Member




Joined: Oct 2004
Posts: 4,528
Likes: 240
From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Posi & Rear Ratio
If you get a 4th gen rear remember it is wider. Zexel are a good choice but you will need 28 spline axles. I went with a yukon duragrip and upgraded to 28 spline no issues.
Thread Starter
Junior Member
Joined: Dec 2019
Posts: 96
Likes: 1
From: Aurora, OR
Car: 1986 IROC-Z
Engine: 6.0
Transmission: 4L60E
Axle/Gears: 10 Bolt/3.43
Re: Posi & Rear Ratio
Thanks for the reply! Yeah, I think I am just going to stick with my own rear end. I already painted it and whatnot. Well, I found a Yukon DuraGrip for a mere $250 new as an Amazon warehouse deal. I am going to follow suit and do the same! Thanks!
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