Drum to Disk REAR END SWAP
#1
Member
Thread Starter
iTrader: (4)
Join Date: Feb 2008
Location: Woodstock, GA
Posts: 213
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 IROC
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.23
Drum to Disk REAR END SWAP
I have a 1989 IROC-Z with drum brakes with 15” wheels. I found a 1987 IROC disc brake rear end. Can someone tell me what all I will need off the 87 IROC to convert my 89 to disk brakes? Will the two rear ends swap without any real issues? Can someone give me a play by play if this will work?
Thanks
Thanks
#2
Supreme Member
Join Date: Jun 2005
Location: Bremerton, WA
Posts: 1,800
Likes: 0
Received 2 Likes
on
2 Posts
Car: 1992 RS / 1989 RS
Engine: 3.1L MFI / Vortec 383 TBI
Transmission: T5 / LS-T56
Axle/Gears: 3.42 open / 3.73 Eaton posi
Re: Drum to Disk REAR END SWAP
I'm doing the same thing, except I've got a 82 disc rear going on a 89 car. Your e-brake cables will probably be different, but everything else should bolt up. You'll also need new brake lines on the axle if the "new" one doesn't have them or if they're pretty beat up. I'm going through the hassle of SAE brake lines on the axle to metric on the car, change over was during the 83 model year IIRC.
#3
Moderator
iTrader: (5)
Re: Drum to Disk REAR END SWAP
I'd pick up the proportioning valve and parking brake cables as well. Your current master cyl is correct. There's a possible idea for the future:
https://www.thirdgen.org/forums/faq-...iscs-89-a.html
JamesC
https://www.thirdgen.org/forums/faq-...iscs-89-a.html
JamesC
#4
Supreme Member
Join Date: Jun 2005
Location: Bremerton, WA
Posts: 1,800
Likes: 0
Received 2 Likes
on
2 Posts
Car: 1992 RS / 1989 RS
Engine: 3.1L MFI / Vortec 383 TBI
Transmission: T5 / LS-T56
Axle/Gears: 3.42 open / 3.73 Eaton posi
Re: Drum to Disk REAR END SWAP
Yeah, I forgot to mention the proportioning valve. I picked one of those up too. Looks like everything else bolts right up.
#5
Member
Thread Starter
iTrader: (4)
Join Date: Feb 2008
Location: Woodstock, GA
Posts: 213
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 IROC
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.23
Re: Drum to Disk REAR END SWAP
Thanks for the info guys. The person gave me everything for $40 rear end Proportioning valve cables and lines. It is a posi 3.23 rear end.
JamesC
It looks like you painted the rear end you have is that true and what was the process in that?
Thanks
Billy
JamesC
It looks like you painted the rear end you have is that true and what was the process in that?
Thanks
Billy
#6
Member
Join Date: Feb 2008
Location: Las Vegas NV
Posts: 173
Likes: 0
Received 1 Like
on
1 Post
Car: 92RS
Engine: 305= boat anchor
Transmission: T5
Axle/Gears: 4th gen 3.23
Re: Drum to Disk REAR END SWAP
40 bucks!Where in the world can I get a deal like that.Oh wait I forgort my dog has better luck than me.You got a great deal man.
#7
Supreme Member
iTrader: (7)
Join Date: May 2004
Location: Lexington, SC
Posts: 5,296
Likes: 0
Received 58 Likes
on
52 Posts
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: Drum to Disk REAR END SWAP
You've got the older style cast iron calipers. You should do a search as there's a repair kit that fixes some issues with it, and includes all the normal rebuild stuff. I got mine through GM Parts Direct a few years back for like $45 shipped.
Trending Topics
#8
Member
Thread Starter
iTrader: (4)
Join Date: Feb 2008
Location: Woodstock, GA
Posts: 213
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 IROC
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.23
Re: Drum to Disk REAR END SWAP
92RS702
Yeah they guy told me to come get it he was about to send the rest of the car for scap. He also said come by this weekend and take what you need before it goes.
NAF
I will look for that repair kit. If anyone can help me locate one please contact me.
Yeah they guy told me to come get it he was about to send the rest of the car for scap. He also said come by this weekend and take what you need before it goes.
NAF
I will look for that repair kit. If anyone can help me locate one please contact me.
#9
Member
Thread Starter
iTrader: (4)
Join Date: Feb 2008
Location: Woodstock, GA
Posts: 213
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 IROC
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.23
Re: Drum to Disk REAR END SWAP
92RS702
I was lucky the guy said come get it before I scap the car. He also said come by this weekend and get what I want off of it, before the car is gone.
naf
Thanks for the info. If you or anyone can help me locate the repair kit please contact me.
Thanks
Billy
I was lucky the guy said come get it before I scap the car. He also said come by this weekend and get what I want off of it, before the car is gone.
naf
Thanks for the info. If you or anyone can help me locate the repair kit please contact me.
Thanks
Billy
#11
Supreme Member
iTrader: (7)
Join Date: May 2004
Location: Lexington, SC
Posts: 5,296
Likes: 0
Received 58 Likes
on
52 Posts
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: Drum to Disk REAR END SWAP
https://www.thirdgen.org/forums/brak...tml?highlight=
part number and some other good stuff inside the above.
part number and some other good stuff inside the above.
#12
Senior Member
iTrader: (9)
Join Date: Nov 2006
Location: LI, NY
Posts: 532
Likes: 0
Received 0 Likes
on
0 Posts
Car: 90 Camaro RS
Engine: 2.8L v6
Transmission: 700
Axle/Gears: 3.23
Re: Drum to Disk REAR END SWAP
Im currently looking at a 1987 IROC disc brake rear end for my 90 Camaro RS.
Would that bolt right up into my 90 RS aswell?
Would that bolt right up into my 90 RS aswell?
#13
Member
Thread Starter
iTrader: (4)
Join Date: Feb 2008
Location: Woodstock, GA
Posts: 213
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 IROC
Engine: 305 TPI
Transmission: T-5
Axle/Gears: 3.23
Re: Drum to Disk REAR END SWAP
Should work just the same as mine. I was able to get everything but the car it was on, heck even got the old shocks. Just try and get as much as you can if it is still on the car. Try and get lines cables the whole setup, then you should be good to go. I have not started mine. I am going to replace the engine before I get to the rear end. Then I am going to strip it down and clean it up and paint it before I start the install.
Thread
Thread Starter
Forum
Replies
Last Post
hectre13
Engine/Drivetrain/Suspension Parts for Sale
2
12-11-2023 08:14 AM
AkDrifted
Engine/Drivetrain/Suspension Parts for Sale
6
08-17-2015 07:45 PM
1992 Trans Am
Engine/Drivetrain/Suspension Parts for Sale
1
08-08-2015 08:16 PM
3rdgenparts
Firebirds for Sale
0
08-06-2015 09:03 AM