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#1
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9 1/4" rearends?
Are the 9 1/4" rears that were being used on lets say a 75 Fury police car the same as the 9 1/4" rears being used on Durangos and Rams now? I realize axle sizes in length are differant. I'm talking about differentials and gears?
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#2
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Yes, but the new rears have a thinner ring gear for the anti lock up system.
Parts are not exactly interchangable from what I understand. Some yes, others no. I'm not to sure on what is exactly OK to do. I have a set of 3.21's for a older 9-1/4 collecting dust. |
#3
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I guess that kind of told me what I needed to know. So, Where do I find new ring and pinion gears for an old rearend? And if I'm looking in SUMMIT catalog and see gears for a 9 1/4 rearend how will I know what its for. Is there a difference in spline count or diameter Ex. (1.876" 29-spline pinion)
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#4
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There is a spline count difference on the axles. I don't remember when the change happened or the count they went to. Summitt should list the years for the geras. But you can call them up for it without a catolog and they'll help you out.
Just tell'em it's the older 9-1/4 from the 70's and they'll get ya the right gears. New gears aren't made so often for a unpopular rear to build. Once you try Summitt/Jegs, go to Mancini racing (.com) and/or your local MP dealer. Sometimes they actuall have stuff. Randys ring and pinion carries hard to find parts. Lastly, you can allways call up Richmond gears, US gears etc...... |
#5
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Randy's is a good place to go. www.ringpinion.com
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#6
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Randys Ring and Pinion up in Washington state has everything in stock for alll the mopar rears at good prices.
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#7
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Or NTS -National Drivetrain Specialties.
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