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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies


Stock Axle Length

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Stock Axle Length Empty Stock Axle Length

Post by 74Malibu383 Tue Apr 24, 2012 4:44 pm

Anyone know the stock Axle lengths in our cars with a 8.5" 10 bolt?
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Post by Joe73 Tue Apr 24, 2012 5:08 pm

Your in luck. My stock 3.42 rear is readily available to measure. It measures 55 inches. That measurement is taken from the backs of both backing plates. I put the tape on the outside edge of the backing plate.

Also, I can tell you that my monte rear is slightly wider than my stock chevelle rear. But you can still easily fit 15x10's with a 4 1/2" offset back there. That's what I'm running.
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Post by 74Malibu383 Tue Apr 24, 2012 5:41 pm

I was actually looking for the individual Axle length. Seeing conflicting info from a couple manufacturers.

I'm running 5.75" of backspacing on the 20x10's. Full tuck...
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Post by McCauley5983 Tue Apr 24, 2012 5:56 pm

I want to say its 28 inches roughly but I'm not positive
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Post by Joe73 Tue Apr 24, 2012 6:15 pm

Sorry, my axle is complete. I dont have that measurement for you.
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Post by 74Malibu383 Tue Apr 24, 2012 6:18 pm

No worries. Thanks for the other measurement though.
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Post by bigredlaguna Tue Apr 24, 2012 6:35 pm

[img]Stock Axle Length Img_5710[/img][img]Stock Axle Length Img_5711[/img]

This is what I have waiting in the closet for install.
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Post by 74Malibu383 Tue Apr 24, 2012 6:52 pm

Those look nice! Are they a factory replacement? What brand? That measurement falls in-line with Moser's specs.

Product Description
Part #: A102812 (1-Pair)
Mfg: Chevy
Model: Chevelle, El Camino, Malibu, Monte Carlo
Year: 1973, 1974, 1975, 1976, 1977
Rear End: 10-Bolt Chevy
Spline Count: 28
Length: 30 5/16" long,
Bolt Pattern(s): (2) 5 x 4 ¾” (.480” Knurl press-in & 1/2” X 20 threaded)

These forged steel street axles for your stock OEM application are non-tapered, with hardened & ground bearing seats and machined c-clip grooves.
Our replacement c-clip axles are available in any length up to 37”. If you choose to narrow your rear end at a later time, these axles can also be shortened and resplined.
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Post by bigredlaguna Tue Apr 24, 2012 6:57 pm

They are Moser axles. Craigslist find for me.
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Post by bigredlaguna Tue Apr 24, 2012 7:03 pm

The guy I got these from said they were in a GTO (2nd gen) I think, and it had an 8.5" axle.

Then whatever situation changed and he went to use these in another 2nd gen, he couldn't because it had an 8.2" axle.
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Post by 74Malibu383 Thu Apr 26, 2012 12:16 pm

Thanks for the info. Are you confident that these aftermarket axles are the EXACT same as our stock ones? I ask because I can't change the location of my wheels at all. Even a 1/4" would be a nightmare.
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Post by bigredlaguna Thu Apr 26, 2012 2:41 pm

I've got a couple laying around, I'll open one up and see.
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Post by bigredlaguna Thu Apr 26, 2012 3:23 pm

Here ya go Bryan:

1974 axle out of my old car

[img]Stock Axle Length Img_5712[/img]

Measured the same way as my aftermarket axle.

[img]Stock Axle Length Img_5713[/img]

Proof

[img]Stock Axle Length Img_5714[/img]
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Post by 74Malibu383 Thu Apr 26, 2012 4:11 pm

Sir - You rock! Thank you. Beer
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Post by 77mali Thu Apr 26, 2012 4:34 pm

74Malibu383 wrote:Those look nice! Are they a factory replacement? What brand? That measurement falls in-line with Moser's specs.

Product Description
Part #: A102812 (1-Pair)
Mfg: Chevy
Model: Chevelle, El Camino, Malibu, Monte Carlo
Year: 1973, 1974, 1975, 1976, 1977
Rear End: 10-Bolt Chevy
Spline Count: 28
Length: 30 5/16" long,
Bolt Pattern(s): (2) 5 x 4 ¾” (.480” Knurl press-in & 1/2” X 20 threaded)

These forged steel street axles for your stock OEM application are non-tapered, with hardened & ground bearing seats and machined c-clip grooves.
Our replacement c-clip axles are available in any length up to 37”. If you choose to narrow your rear end at a later time, these axles can also be shortened and resplined.


So then we can assume that they are all 30 5/16", as per what Moser states? Sure looks like the 74 axle is. That's good info gentlemen.
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