I had my friend at a local GM dealer look up the part numbers for thirdgen axles. Yes he knows what he's doing. According to the computer, all 9-bolts have 26 spline axles, as the axle part number is the same from 85 to 89. The 10-bolt axle part number changes from 89 to 90, so I am assuming that 10-bolts didnt get 28 spline axles until 1990.


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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

9 bolts use totally different axles than the 10 bolts. Not only are the lengths different, but the 9bolts don't have provisions for the c-clips.

 

The left and right 9-bolt axles are also different lengths. When I first started looking, I phoned the dealer. He must have thought I was looking for 9-bolt axles because I said posi and disk brakes and he said it showed left and right. The price was also outrageous.

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1985 Yellow IROC-Z 5.0 HO, T-5 3.73 Torsen, 4 wheel disks
PFCM pads, GTA wheels, Koni yellows, B&M Ripper, Dynomax

 

Every rear I've seen has had different length left & right axles.

But, perhaps I haven't seen them all...

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" Hedders, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere w/open diff & slipping tranny. Daily driver while Camaro was being put together.

 

Some GM rears have equal lenghts. Actually I think the 7.5" 10 bolt does (or pretty close)

 

the 7.5 has = lengths, I had to order a pair of 28s for mine from dutchmann for $240 and they were equal length.

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91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 224/230 duration and .477/.480 lift. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, 3000 stallconverter. Edelbrock TES, 3inch cat, flowmaster with single 2.5 inch exit.
Best time yet to come
12's?? :crossthumbs:

This is a Pic of my car in race trim www.tbns.net/billyjay/camero.jpg

Yes I know how to spell camaro- so dont ask. I didnt make the link

 

Are you correcting me, or adding more info? I knew that. I was just providing the info on the change from 26 to 28 spline axles.

Vortecfcar, check your sig. I didnt know there was an "E" in Camaro.

 

Learn something every day. I've not had the axles out of a 7.5.

 

Can't correct you if you were right, can I?

Just adding in and bringing the message up.

 

Actually the info helped me since I was considering the SLP takeoffs in my 88 and alot of people seem to be asking about this swap.


[This message has been edited by JoelOl75 (edited April 13, 2001).]

 

I got my 28 spline axles from Camaro Heaven (1-800-CAMARO1) for $75 each. He only had 1 disk brake axle at the time, so I had to turn the flange down on the other one to fit inside the rotor.

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1985 Yellow IROC-Z 5.0 HO, T-5 3.73 Torsen, 4 wheel disks
PFCM pads, GTA wheels, Koni yellows, B&M Ripper, Dynomax