9" rear end
Freshman User
Joined: Aug 2002
Posts: 45
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9" rear end
almost everyone I have talked to says 28 spline. Someone said it could be 32 spline, but that is rare.
With the older mustangs you could generally look at the end of the axle shaft(take tire off and look at the end) square was one and triangle was the other, which is 28 and 32 I don't know.
If you find out how many splines can you post it as I have the same combination and I do not want to take the axle out to check.
With the older mustangs you could generally look at the end of the axle shaft(take tire off and look at the end) square was one and triangle was the other, which is 28 and 32 I don't know.
If you find out how many splines can you post it as I have the same combination and I do not want to take the axle out to check.
Posting Guru
Joined: Jun 2002
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9" rear end
There is no 32 spline for 9", only 28 & 31. My '73 with a 400/C6 didn't come with a 9". It looked more like 8.8" integral type. I swapped it for a 9 3/8" disc brake rear from a '76 wagon and installed a 3.70:1 posi 9" third member (28 spline).
Post Fiend
Joined: Nov 2001
Posts: 5,871
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From: Coutts Canada
9" rear end
My truck(below) has a 31 spliner in it. I know this cause the one is axle is sitting on the work bench. if you want i can go check and see if there is anything special about it so you can tell.
Cody, Coutts Alberta
82' Flareside: zoom zoom doesn't even begin to describe it, 2/4 Drop, Soon to have 325hp 351 Clevo (maybe more,in a 3600lb truck)Backed by a C6 with a 2000 rpm stall and a 3.50 9 incher, American Racing AR-23 (series 23) wheels, Upgraded interior, Sony Xplod stereo
Cody, Coutts Alberta
82' Flareside: zoom zoom doesn't even begin to describe it, 2/4 Drop, Soon to have 325hp 351 Clevo (maybe more,in a 3600lb truck)Backed by a C6 with a 2000 rpm stall and a 3.50 9 incher, American Racing AR-23 (series 23) wheels, Upgraded interior, Sony Xplod stereo
Elder User
Joined: Sep 2000
Posts: 936
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From: Bay area
9" rear end
28 splines is what you mostl likely have. Pull the shaft and count them.
28 & 31 splines are stock.
35 and 40 spliners are all aftermarket. and as far as I know need to be ran with a spool only in the rear end.
28 & 31 splines are stock.
35 and 40 spliners are all aftermarket. and as far as I know need to be ran with a spool only in the rear end.
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Senior User
Joined: Dec 2001
Posts: 356
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From: space city
9" rear end
i asked about my '75, and was told most likely it was a 28 spline. it came from the factory with 3.89 gears and posi-trac, so chances are that if there was a 31-spline available, i would have it. on the other hand, it also had a 351W, so maybe the big-block ranchero's had 31-spline.
i've done some looking, and stock axles seem to be either 28 or 31 spline. racing parts also come in 33 spline and maybe 35 or higher - but no 32's...
i've done some looking, and stock axles seem to be either 28 or 31 spline. racing parts also come in 33 spline and maybe 35 or higher - but no 32's...
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9" rear end
ok, so maybe I got a number mixed up. I didn't feel like opening a catalog and wasn't sure if it was 31 or 32. You can get 32 spline axles, but you will be doing some grinding on some 35 spliners.
And, I keep hearing people say the 429 equipped cheros came with 31 spline axles, usually with numerically higher ratio gears.
The tag on the rearend should say. I don't care if there is not a tag, just pretend there is and you can have any setup you want.:7
And, I keep hearing people say the 429 equipped cheros came with 31 spline axles, usually with numerically higher ratio gears.
The tag on the rearend should say. I don't care if there is not a tag, just pretend there is and you can have any setup you want.:7