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Old 02-17-2011, 05:44 PM
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gear swap questions.

I have just torn apart the diff on my 97 f350 dually. Changing gears from 4.10 to 3.55. On the pinion gear for testing gear alignment do you have to press the inner pinion brg. on and off each time for changing shims or should I polish the pinion shaft surface down to make a tight slip fit with the inner brg.? Just seems like if I press on and off each time there is a high prob. of damaging the brg. before final assembly. Also the carrier came out with just two large spacers (one on each side) of the carrier. No thin or thick shims, just spacers about .250 thick. Were the factory tolerances good enough that factory gears didn't need shimmed to fit? This is the first gear change I have performed so I am taking it slow and want to get it right. Thank you for any tips or help anyone can offer.
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Old 02-17-2011, 07:12 PM
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Quote:
Originally Posted by billybob97 View Post
I have just torn apart the diff on my 97 f350 dually. Changing gears from 4.10 to 3.55. On the pinion gear for testing gear alignment do you have to press the inner pinion brg. on and off each time for changing shims or should I polish the pinion shaft surface down to make a tight slip fit with the inner brg.? Just seems like if I press on and off each time there is a high prob. of damaging the brg. before final assembly. Also the carrier came out with just two large spacers (one on each side) of the carrier. No thin or thick shims, just spacers about .250 thick. Were the factory tolerances good enough that factory gears didn't need shimmed to fit? This is the first gear change I have performed so I am taking it slow and want to get it right. Thank you for any tips or help anyone can offer.
u have to set pinion depth there's a formula to do it but im not sure of it a local tranny shop thats any good will know, and u should also get your pinion and ring gear as a matched set
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