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Old 07-03-2017, 12:44 PM   #1
Bob Mulry
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Default Re: 8 3/4 Chrysler pro gears?

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Originally Posted by Myron Piatek View Post
I read a dedicated article comparing rear end efficiency in one of the old car magazines a long time ago. Of the rears that I remember they tested, this was the order of efficiency:

1) GM 12 bolt
2) Dana 60
3) Chrysler 8 3/4
4) Ford 9"

I believe it said that the biggest factor is the placement of the pinion in relationship to the ring gear. The higher the pinion (closer to center), the more efficient it is. The 9" has the additional disadvantage of an extra pinion bearing.

I don't recall what others were tested.

Somebody makes/made a 12 bolt style center section for 9" housings. Was it Jim Kinnett that had a 12 bolt or a Chrysler 9 1/4 rear in his SS/AA Cuda?
Hi,

Strange still manufactures an aluminum 12 bolt drop out center section that fits into a 9" Ford housing........

I wonder if that will pass tech (HA HA) for a GM Stock Eliminator car?????

Just sayin'
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Old 07-03-2017, 04:30 PM   #2
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Default Re: 8 3/4 Chrysler pro gears?

Quote:
Originally Posted by Bob Mulry View Post
Hi,

Strange still manufactures an aluminum 12 bolt drop out center section that fits into a 9" Ford housing........

I wonder if that will pass tech (HA HA) for a GM Stock Eliminator car?????

Just sayin'
Bob,

The Strange 12-Bolt, 9" drop out has weight limitations on its use.
It's designed for very lightweight cars, dragsters and roadsters.
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Old 07-06-2017, 06:39 PM   #3
Bob Mulry
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Default Re: 8 3/4 Chrysler pro gears?

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Originally Posted by SSDiv6 View Post
Bob,

The Strange 12-Bolt, 9" drop out has weight limitations on its use.
It's designed for very lightweight cars, dragsters and roadsters.
Do you want stuff to live forever??????

Look at all of the "Stock" cars that run lightweight front disc brakes for "safety"

Usually light duty is fast, at least for a while.......
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