where to measure is RING GEAR DIAMETER

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Mar 29, 2007 | 08:56 AM

jeejee

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where to measure is RING GEAR DIAMETER

forgive my ignorance
but what measure is exactely used to state "ring gear diameter" like a ford 9 inch or 8.5 or 8.8 ?

A , B or C ?

thanks, Jeejee

Mar 29, 2007 | 10:47 AM

FirstYrLS1Z

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I measure the 'A' and you'll find some are 7-1/2 and some are 7-5/8. Both sizes have the same bolt size and pattern and same inside dia. for slipping onto the carrier.

Mar 29, 2007 | 11:42 AM

mzoomora

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You will also find that higher numeric gears will be larger diameter because of the smaller pinion.

Mar 29, 2007 | 11:47 AM

NHRAMAN

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You measure at " A " ..

Mar 29, 2007 | 03:29 PM

jeejee

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oke thanks, so the biggest diameter is the one to go for

eventhough in theory a 6:1 ratio on a small carrier could mean a bigger RING DIAMETER then a bigger carrier with a 2:1 ratio ?

Jeejee

Mar 29, 2007 | 05:49 PM

mzoomora

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There is no real difference between the 7.5/7.6. The ring gear design was never actually changed, just the pinions looked slightly different and the carriers were slightly different. Getting a 7.6 ring gear in place of an old 7.5 will be no gain, and all the aftermarket stuff is the same.

Jul 31, 2008 | 09:58 AM

99Hawk6spd

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I know I'm dredging up an old post, but could this be added to the FAQ thread on this forum? I was wondering about how they measured these to, and had to search for it, when I think it is a FAQ for some newbs like me.

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Mar 25, 2010 | 09:52 AM

cambirdracing

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Quote:

Originally Posted by mzoomora

You will also find that higher numeric gears will be larger diameter because of the smaller pinion.

Not really, just thicker b/c of the smaller diameter of the pinion. You would have to have a shorter in length pinion to have a bigger diameter ring gear.

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where to measure is RING GEAR DIAMETER

where to measure is RING GEAR DIAMETER

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