will ls1 rear brakes swap over to 3rd gen rearend just by swapping the backing plate?

 

The LS brakes are more than just the caliper and rotor, the parking brake is a drum disc design that is inside the rotor. A simple backing plate only attaching the caliper to the differential would not allow use of the parking brake. The caliper has no provisions to provide any mechanical braking so you can't use the LT1 or L98 e brake pieces on it. You would be better off just purchasing a LS rear.

 

i know the E-brake cables are different. thats not a problem. i have factory rear disc E brake cables off a 1990 camaro with the aluminum pbr calipers. and i also have a set of ls1 E brake cables. thats why i wasnt to concerned about the E brake cables because if the ls1 rear brakes would mount to the 3rd gen rearend it wouldnt be to hard to hook up the E brake cables. but i think the ls1 rear brakes face the front of the car and the 3rd gens face the rear. not sure if that matters when mounting the ls1 brakes. just curious if anyone has ever put ls1 brakes on a 3rd gen. (ON THE REAR)

 

https://www.thirdgen.org/ls1reardisc

3rd gen disk to 4th gen disk is a bolt on affair. Mounting the 4th gen ebrake cables takes a simple bracket mounted to the tunnel, the 3rd gen clips will not allot the cable to reach the balance bar

 

So 3rd gen disc brakes will not fit on an ls1 rear end?

 

They will, but why would you want to?

 

Because I just did rear brakes and calipers on my 10 bolt and my rear is on the way out. Need a new rear and was going to do an ls1 rear. Found a used 9 bolt off a 3rd gen for sale about 30mins from me.

 

Fbody disk brake flanges are the same for all 10 bolts

I wouldn't bother trying to save a few bucks on older smaller brakes if considering a complete newer ls1 axle. If it's a lt1 axle, the brakes are the same as your 91

 

You sure about that? I recently have been researching if I can put PBR calipers (93-97) on my LS1 car since one of my backing plates is junk and hard to find, and I've read that the distance between the housing flange and axle flange is different so the earlier PBR brakes won't bolt up..

-- Joe

 

Give it a shot. LT1 rear disks are a common swap for LS1 cars to fit 15" wheels

 

Got any links to threads on that? Jeff @ tacreationsusa told me he's tried and the 93-97 brakes won't work on a 98-02 housing without clearance problems..

-- Joe

 

That I cant answer. Best bet is to measure

I do know that the flange itself is the same for all 82-92 disk brake 10 bolts. Ive used several different housings with my 8.8's, but I set the housing flange to axle flange distance before welding it together. I cant comment on differences by year

Ive got two local club members that I know of with LT1 brakes on 98-02 cars. Ill ask them

 

my ques is, how well do the LS e brakes work? I have the 89-92 PBR's and they are good for parking but if I pull them to aid in stopping they are just along for the ride.

 

There's no such thing as "e brake". All any cars have, is the "service" brakes (the regular hydraulic ones) and the "parking" brake.

All parking brakes are like that. All they're intended to do, is hold the car still when it's stopped, and they mostly don't even do a very good job of that. (which is of course why you turn your wheels toward the curb when parked on a hill) They are not designed or able to act as "service" brakes in any manner way shape form or fashion.

 

Problem is the car will fail inspection in some circumstances because the state legislature feels otherwise.

In Massachusetts the parking brake must hold the vehicle from moving while at 1300 RPM in drive.

(From the inspectors manual dated 2011)

"3. Parking Brake Procedure:
With vehicle transmission in neutral, set the parking brake firmly. Inspect the parking brake function for setting and release. Reject the vehicle if the parking brake will not prevent the vehicle from rolling when the motor is accelerated to approximately 1,200 to 1,300 RPM in the lowest forward gear.
"

My powerstroke at 1300rpm would pull a house down off it's foundation, yet the parking brake was supposed to hold the engine back.

-- Joe

 

Exactly:

The key is, "prevent the vehicle from rolling"... not "stop the vehicle from 35 mph" or the like.

But yeah, there can be AHELLUVALOTTA difference in rear-wheel torque from one engine to another. Even at that, it's amazing that ANY vehicle with anything bigger than the weeeeeeeeniest 4-cylinder, can successfully pass that requirement. Looks like one of those times when having the tach typical of these cars, that reads high, can work to your advantage.

 

haha. Yeah I didn't imply it was an emergency brake haha. I just mean, they are pretty strict about keeping the car from rolling down a hill.

That's a good question. Do they look at the tach in the car, or the output on the computer?

What if you have a non-obdII car with no tach?


-- Joe