Does anyone know which 3rd. gen. camaro rearend is the best? I have a 84 Z-28 5.0 H.O. with a 383 stroker and a 4L60 trans. but my rearend is a whimpy 7.5 10 bolt.I heard that a 88 up IROC rearend was the best because it has a 7 5/8 ring gear and 28 spline axles,oppossed to the 7 1/2 ring gear and 26 spline axles in my 84 rearend.Is that true? I would appreciate any info on this matter,thankz *Robin*

 

Some of the thirdgens 87 and up came with the rare australian 9 bolt rear end, I heard those are stronger then the 10 bolts, anyone feel free to flame me and correct me if im wrong

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1988 Camaro IROCZ "MIDNIGHT CRUIZERS"
305 ci Tuned Port 700R4
3"Exhaust/Flowmaster 80 series muffler/Dynomax high flow cat/CutOut
hypertech chip/k&n filers, cut MAF screen gutted air box
"Theres no replacement for displacement"
My Iroc web page....
www.geocities.com/bobfitz82/index.html

 

Here is a site to help out with 9 bolt info:

http://www.difftechnics.com/9_bolt_home.html

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1990 Camaro RS
1991 Acura Integra LS
http://www.geocities.com/joecool_2u/
LT1 swap in progress.
XE 230/236 cam, 1.6 roller rockers, "R" lifters, Underdrive Pulley, air foil, and SLP headers.
Posi 3.73 9 bolt rear end, BMR suspention components, 3200 Vigilante, and Transgo.

 

The 9 bolt is stronger than the 10 bolt but the 10 bolt can be beefed up to take a lot of abuse. I was running high 11's on a 10 bolt before finally switching to a ford 9".

The 10 bolt didn't get the 28 spline axles until 1990. 7 5/8" gears came around 86 or 87.

Athough it is a bit bigger, the 7 5/8" ring gear isn't much different from the 7 1/2". Both are interchangable on the same carrier.

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Stephen's racing page
or check out the race car

87 IROC SuperPro race car
461 big block
Best ET on a time slip: 11.589
Best MPH on a time slip: 115.91
Best corrected ET: 11.114

Altitude corrected rear wheel HP: 457
Best 60 foot: 1.646
Member of the Calgary Drag Racing Association