Spdfrk1990

Any1 know where i can get a set of 1le rear brakes. I have the front set now i need the rear. I need to have the rotors, calipers, and all the brakets so i can hook up the e-brakes n all.

CrazyHawaiian

Just to let you know the rear disc brakes were the same on 1LE's and 4 wheel disc Z28's/IROC's after 1989. AndyZ28 sells a kit if you want to buy new. Do a search to find it. Its around $700. I plan to buy that kit for my 9 bolt rear when I have some xtra $$. Otherwise you can check the junkyards for IROC's/Z28's. Good luck!!

DJP87Z28

I note in your signature that you have a 3:27 gear ratio. That is one from a BW 9-bolt and if it is a 1989 you will already have the 11.655 rotors and PBR Alum calipers (AKA 1LE). So make sure what you really have before trying to upgrade.

Spdfrk1990

I know i have a bw 327 i got it from the junk yard and its a pre 89 tho.It has the ****ty cast iron calipers. I looked up the year 1 day but i cant remember it i think its a 87.Supposely you can bolt the 89 setup to ne third gen rear disc rear end. I wasnt exactly for sure the 89-92 setup was the same as 1LE if so i could prob find a setup at the junk yard then. Thanx crazy hawaiian i just never got a chance to compare them. Dont have many friends with third gens.

DJP87Z28

Ok, so you do have a pre 89 BW. I am not completely positive the 89 Disc's will bolt directly on so check that question. Now if you can find a 89 11.655 rotor & alum calipers you should be good shape. Again do not spend a lot of money on them. Just remenber they are the same as 1LE brakes, so don't let anybody Jack you around with the name.

Spdfrk1990

Alright thanx man i wasnt sure. At the time i got my rear end i didnt know much about the different style brakes. They said it was a 91 rear end and it wasnt. Which makes me mad cause the one i asked for was off a 89 iroc. Cause really when i was reading about the rear brakes in the technical info it says pre 89 rear calipers shouldnt be used with a 89-92 master cylinder.

DJP87Z28

Thats not true also. Only things I would make sure you get with the 89 brakes are the Proportioning valve and the Parking brake cables.
The only major parts you need. Happy hunting for the brakes.

Spdfrk1990

I know my master cylinder is fine for the 89-92 rear brakes cause my car is a 90. I alrdy have the right proportioning vlave. The pre 89 brake dont work right on my car tho case it is a 90.as said in this article
http://www.ws6transam.org/1LEbrake.html

87IROC350

No, you can not just bolt 89+ rear calipers to a rear set up for an 88 or older.

You need the correct mounting bracket for a 9bolt w/PBR (10 bolts have different bolt pattern). I believe the 9 bolt rear w/ PBR only came out on the 89's.

Spdfrk1990

I know i need the brackets. The site i had posted b4 said as long as u have a disc rear end the brackets will bolt up.I dunno i can goto the junk yard and check it out. As long as i know the 1le's r the same as the 89-92 z28 im fine.Ill just look at the brackets ill know if they would bolt up 2 mine or not. Also not all rearends with disc pre 89 were borg warner. But they all had the same design of rear calipers.

ebmiller88

iTrader: (7)

Not necessarily true. The backing plates are different for 9 and 10 bolt rears. They will fit but you would have to modify either one or the other. These brake systems are HARD to find at a scrap yard. You're best bet would be to get Andy's kit. It's all new. Andy also has backing plates drilled for both 9 and 10 bolt rears if you just need those.

You probably should have taken it back to get the correct one, you kinda got screwed there, you know?

Again, calipers yes, but backing plates no. The 9 and 10 bolts have a different mounting hole pattern so it's not a direct swap. Also, the rotors between the '88 and older and the '89 and up systems are different.


So where are you on your brake swap?

Ed

Spdfrk1990

im done i have the 1le's in the front but i want the pbr's in the back. Ive seen quite a few 89-92 rear brakes at the junk yard.

CrazyHawaiian

Oh I didnt know you had a pre 89 B/W 9 bolt rear. You're in the same boat as me then (I got a 88 B/W rear in my 90 RS). These guys are right man, the 10 bolt stuff wont just bolt up. Along with what they've said, the 9 bolt rear discs also require different hardlines. Andy's kit will come with everything you need. Baer also sells a kit for the 9 bolts, but from what I've read it is not as complete as Andy's kit and more expensive. I thought about doing the junkyard thing too, but like they said its really hard to find the right parts. I decided to save up and go with Andy's kit. Its worth the $$. My 91z was easy, 10 bolt rear, got LS1 rear discs for $250! The 90 RS wont be as easy ....

Spdfrk1990

thanx man here are some pix of my front calipers

Spdfrk1990

another, also does andy's have a website.

ebmiller88

iTrader: (7)

www.andyz28.com

but you'll probably have better luck if you PM him for more info.

HTH...Ed

Spdfrk1990

SOB i should go raise hell at the junk yard those fawkers. I dont want to have to take the axes out. I heard on a 9 bolt it might not be that hard tho.I get what u guys r sayin i miss understood some1 else. If i find a 9 bolt tho very unlikely tho with the pbrs it would work the brackets should bolt right up and have the right spacers.

Spdfrk1990

if ne 1 know the part # for the mounting bracket for the 9 bolt if they still sell it couldnt i just buy that n i know i could get the rest of the parts.

87IROC350

You can no longer buy the brackets for 9 bolts any longer. GM discontinued..... I found mine on ebay.

Andy is probably the best source.

KRUSS

That's right, factory 9-bolt backing plates for 1LE rear calipers are no longer available through GM. However, Baer still sells them. Unfotunately, they're about $80.00 each. They are a direct bolt-ons to the 9-bolt axle flange.

p.s.: GMPartsDirect.com still sells the backing plates for adapting the PBR rear calipers to the 10-bolt ("Corporate") axle. They're about $10.00 to $12.00 each. I have 2 sets if anyone is interested.

Spdfrk1990

Why doesnt Andys site have ne prices or nething

DJP87Z28

Anybody interested there is a complete rear 89 9-bolt brakes for sale on e-bay on the Items matching (IROC). Last bid was $86

ebmiller88

iTrader: (7)

Andy's out of town for a while so that's why you haven't heard anything from him. He doesn't post prices since most of his kits are custom put together so he can quote you on what you need.

The complete rear kit will run you right at $700 give or take a few bucks.

Ed

Spdfrk1990

kewl i just need the mounting brackets that connect to the axel housing.

ebmiller88

iTrader: (7)

You only need the backing plates? Andy's got mine or I'd sell them to you.


Ed

Spdfrk1990

thanx lol