Can I just change my rear end?
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Joined: Apr 2014
Posts: 184
Likes: 0
From: Land Of 10,000 Lakes
Car: 1991 Camaro RS
Engine: Built TBI 350
Transmission: T-5
Axle/Gears: 3.42 Posi
Can I just change my rear end?
I have a 91 camaro RS. It has the factory 3.08 non posi 
.
I want to change to a 3.23 or a 3:42 posi but I have to ask.. What problems would I run into? I have heard it screws up your speedometer. Is this true?
.I want to change to a 3.23 or a 3:42 posi but I have to ask.. What problems would I run into? I have heard it screws up your speedometer. Is this true?
Joined: Oct 2013
Posts: 2,612
Likes: 157
From: Louisville, KY
Car: 1983 Z28
Engine: 385 Fastburn
Transmission: T-5
Axle/Gears: BorgWarner 9-bolt posi, 3.27 gears
Re: Can I just change my rear end?
Changing to another 10-bolt (or 9-bolt) rear end will be an easy, direct bolt up.
If you change the gear ratio it will make the speedometer be off(there's calculators online to determine how much). I would think that changing to a 3.23 gear wouldn't be that drastic of an error on your speedometer though.
If you change the gear ratio it will make the speedometer be off(there's calculators online to determine how much). I would think that changing to a 3.23 gear wouldn't be that drastic of an error on your speedometer though.
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iTrader: (2)
Joined: Feb 2010
Posts: 460
Likes: 3
Car: '89 Camaro
Engine: LS1
Transmission: 4L65/70E
Axle/Gears: 9 Inch, 3.70 gears
Re: Can I just change my rear end?
Red is correct, your speedo will be off. There are calculators to determine what gears you need to put in the sender for your speedo to read correctly, based off of rear end gears and tire size. As long as you are swapping a drum brake to a drum brake rear, or a disk brake to disk brake rear, it's easy. Even switching from drum to disk is fairly easy.
One suggestion, I don't know if you already have them, but as long as your rear is out, switch out the control arms and the panhard bar.
One suggestion, I don't know if you already have them, but as long as your rear is out, switch out the control arms and the panhard bar.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
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