Denny, the problem arises when you try to install the 4.10 ring gear on the carrier made for the 4.57- - - -it doesn't mesh with the pinion. Thge offset of the mounting flange is different when the ratio is changed, because the thickness of the ring gear and the root diameter of the pinion is also changed. Unless you have a 4.10 ring and pinion handy, the difference can't be observed. The carrier MUST match the gear ratio.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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