Need a little help on rearend gear?

03outlaw

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Apr 13, 2003
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600
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Wichita KS
A buddy of mine bought some 3.90 rearend gears for his 89 gt. with the stock 8.8. Is there such a gear for the 8.8? We are having a lot of problems getting the pinion set right. Seems to be way to tight. I have done many 8.8 and never had this issue. He said the 3.90 for the 8.8 just came out. Any help? Thanks in advance!:shrug:
 

A2V2NV

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Apr 3, 2004
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Rapid City, South Dakota
3.90 is most likely an aftermarket geat set, like from Strange Engineering, etc. Unless Ford Motorsport is now makin 'em.

Talk to a local garage, maybe they can give you a tip on setting the pinion!!!

joe
 

trojan8022

I hate lug nuts & studs
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Mar 2, 2004
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Arizona
Thats weird Ive never heard of those before.. I've heard of the 4:10, and 3:73.. wow I wonder if it is new..
 

BCM0018

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Mar 23, 2004
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yeah they are brand new Pro 5.0 and Motive performance make them.
 

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