Need clarification: Considering rear LS1 disc with 4th Gen rear. Potential problems?
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Joined: Apr 2000
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From: MidWest
Car: 91 RS/ 99 T/A/ 72 Vette/ 02 Z28
Engine: LSx/ Dart400
Transmission: M6/ M6/ TH400/ 4L60E
Axle/Gears: 4.10's / 3.08/ 2.73
Need clarification: Considering rear LS1 disc with 4th Gen rear. Potential problems?
Need clarification: I'm considering swapping to rear LS1 type disc brakes from the current drums. I have a fresh 4th Gen rear from a 98 Camaro with 3.73's & Auburn posi I can swap in. Are there any potential problems with using the 4th Gen rear and LS1 rear disc brakes in a 91 RS?
I'm not aware of pitfalls with doing this based on the searchs I've done but I really have to know for sure before I spend a couple of hundred dollars on parts at Autozone.
Constructive comments & opinions are greatly appreciated.
Thanks in Advance.
I'm not aware of pitfalls with doing this based on the searchs I've done but I really have to know for sure before I spend a couple of hundred dollars on parts at Autozone.
Constructive comments & opinions are greatly appreciated.
Thanks in Advance.
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From: Fort Mill, SC, USA
Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
The only "real" problems I know of will be hooking up the emergency brake cables, you'll need to do some fab work to make up a bracket for the cables. It's been done so do a search for it. Other than that, maybe a pro valve swap but that's it...it's gonna work for ya.
Ed
Ed
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
and the wheel offset. the 4th gen rear is wider than a 3rdgen, so you wheels are going to stick out 2"
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From: Upland Pa
Car: Camaro Vert
Engine: 355 HSR
Transmission: A4
Axle/Gears: 3.73 S60
You know that their is a tech article explaiing how to do this and has answers to all your questions right?
Kat
Kat
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Senior Member

Joined: Apr 2000
Posts: 682
Likes: 24
From: MidWest
Car: 91 RS/ 99 T/A/ 72 Vette/ 02 Z28
Engine: LSx/ Dart400
Transmission: M6/ M6/ TH400/ 4L60E
Axle/Gears: 4.10's / 3.08/ 2.73
I read a tech article from this board on swapping LS1 brakes onto a 3rd Gen with drum brakes with a 3rd Gen rear. Is that the article your refering too?
I hoped I might turn up a little more info on using a adjustible valve to dial the line pressure in for the rear brakes. Looks like it will be a trial and error thing.
I hoped I might turn up a little more info on using a adjustible valve to dial the line pressure in for the rear brakes. Looks like it will be a trial and error thing.
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