I have an 89 Iroc 350 with a 9 bolt BW 2.77 rear and disk brakes. The ring gear is missing 3 teeth. So I want to drop in a used 10 bolt rear. I have found many people selling 10 bolt rear ends with drums. Is there a way to change the mounting brackets or something to bolt on my disk brakes?

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1989 Iroc-Z Blue T-Tops
Modes:
Headers, B&M tranny, K&N's

 

I need to order a rear end ASAP hopefuly tomarrow but I have to know if a can buy a 10 bolt with drums and get the mounting plates for disks at the Junk Yard and use my disks brakes.

 

Disk and drum brakes have different mounting brackets on the ends of the housing. You might be able to redrill the mounting holes but be prepared to do some modifying to get it to work. It's not a direct swap.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.89
Best MPH on a time slip: 121.52 altitude corrected to 125.89
Altitude corrected rear wheel HP: 497.9
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

You'd be crazy to go to a 10 bolt. they suck. rebuild yours w/ 3.45 or 3.70 gears or get a used one.

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SUPERCHARGED 87 GTA: Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best ET (Nat. Asp.): 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 -*100% NYS emissions legal*
http:// www.community.webtv.net/munks87/JustinsGTApage.com
VORTECH S-TRIM completed 7/9/01: 10 & 15 LB. Pulleys, HKS race bypass, serpentine swap. No ET: 8/26/01, Blew motor before track. Rebuild in progess. Beat a freinds 12.9 @ 108 Camaro by A LOT. EST. mid-low 12's as it was. Looking for 11's w/ new motor.

 

I've got new 9 bolt carriers and 4.10 gear sets for sale. I can also get other gear sets. Send me an email if you are interested.

Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES, it is a 9 bolt & YES they are 3.73's, not 3.70. I currently have 4.10 gear sets and new series 3 carriers in stock for 9 bolts )
www.koolmeister.com

 

I have switched my screen name from "I can't Think of anything" to "89 Iroc Z"

I would rebuilt my 9 bolt except 9 bolts are hard to find after market parts for and from what I have heard 10 bolts have more potential. So if I ever drop in a new higher output engine (which I am going to do) I will be able to modify the 10 bolt to take it. Am I correct in assuming this?

 

The 9 bolt is much stronger than the 10 bolt (that's why it was the high performance option). And anything that can be done to a 10 bolt can also be done to the 9 bolt.

Parts are not hard to find anymore as I (along with some others have been working on changing that. I am currently building an inventory as fast as possible and have new carriers (series 3) and 4.10 gear sets in stock.

Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES, it is a 9 bolt & YES they are 3.73's, not 3.70. I currently have 4.10 gear sets and new series 3 carriers in stock for 9 bolts )
www.koolmeister.com