i want a rear disc setup for my car really bad, but i odnt know exactly what i am looking for. i want a "newer" version of the 10-bolt. with the 7 5/8" gear and 28 spline axles if possible. what codes, etc should i look for?

what year should i look for?

i dont really know a whole hell of a lot of specifics about rear ends so any help would be greatly appreciated.

the gears don't matter because i plan on getting it rebuilt before it goes on the car anyways.

thanks a lot.
-brian

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1991 Camaro RS
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Ultra Blue Metallic, T-Tops

GM 350 HO Crate Engine - Vortec Heads, Edelbrock Performer Vortec Intake, Holley 670 CFM Throttle Body, Open Air Cleaner w/14"x3" K&N, SLP 1 3/4" Stainless Headers, Edelbrock Victor Series Water Pump, Accell Superstock Wires, Cap, and Rotor, MSD Blaster Coil, Hypertech Fan Switch & Thermomaster Chip, AC Delco Rapidfires, 3" Cat Back, Flowmaster 40 Series Muffler

700R4 - 2,400 Stall Converter, Vette Servo, Shift Kit, B&M Super Cooler

Brian's 1991 RS

Central NY F-Body Association

z28boy@twcny.rr.com IM name: Z28 Boy

[This message has been edited by Z28 Boy (edited October 30, 2000).]

 

If gears don't matter just get a rear out of any 90 and newer car or it may be 89, I know 89 was the year for the pbr calipers (what you want) it my also be the year for the better axels. This probably did not help much.

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Taylor Spiro-pro wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

 

The newer version disc rear has finned aluminum calipers and 12" rotors. Just bring a magnet with you, and don't believe everything anybody at a junkyard tells you. I had quite a few people tell me they had the new rear, but when I went there, the rears had the older iron calipers and smaller rotors. I ended up just rebuilding my rear end with a HD Torsen, GM gears, and HD axleshafts, as well as new bearings and seals. I still have the aluminum drum brakes, but might spring for the Baer kit next year...

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Greg Westphal
'87 IROC 305TPI/A4

 

Go with a 89 and up rear that has the newer PBR calipers. The older ones are a nightmare to get working and usually never work that well. Also, keep away from the 9-bolt if you plan on a rebuild, the gears will cost a fortune

 

I think the 9 bolt was dropped by then. The only 3rd gen options you have are 90-92 for 28 spline axles. 89 had the newer disks but was still 26 spline. All the 4th gen cars have 28 spline axles and newer disk brakes however the diff is 2" wider per side.


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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car and knocking on the SuperPro ET class
383 stroker (carbed) with double hump cast iron heads and pump gas
LS6 Big Block buildup now in progress for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857
Best corrected ET: 11.163
Best MPH on a time slip: 117.87
Best corrected MPH: 126.10
Best 60 foot: 1.662

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