10 tooth pinion question

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Dennis Prince
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10 tooth pinion question

Post by Dennis Prince » Sun Feb 05, 2023 2:25 pm

I have a 10 tooth pinion that is marked 10-42, will that work on a 40 tooth ring gear? It looks just slightly different. Thanks for any help that I can get. Dennis


Art M
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Re: 10 tooth pinion question

Post by Art M » Sun Feb 05, 2023 2:34 pm

It will probably work but would be noisy.

Art Mirtes


speedytinc
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Re: 10 tooth pinion question

Post by speedytinc » Sun Feb 05, 2023 3:27 pm

Was the new pinion designed to run with Ford gears? NO
Will it? Maybe.
Will it create new fit issues with gear teeth clearance? Likely.
Will it be noisey? Maybe.
Is the metallurgy good to where a tooth wont break off? Maybe.

Back in the day, changing to a 10T pinion meant only pulling the D.S. Doing that with this gear would certainly be a problem.

You can roll the pinion on the intended ring gear. If it seems to mesh without clicking, it might work.

All the risk, hassle & potential wasted time worth it?
NO, not when a NOS ford gear is readily available here @ a fair price. NOS!!!
(I bumped it up just for you)


Topic author
Dennis Prince
Posts: 344
Joined: Sun Jan 06, 2019 2:36 pm
First Name: Dennis
Last Name: Prince
* REQUIRED* Type and Year of Model Ts owned: 1)24 touring 2)25 TT's 1)26 roadster 2)26 tourings 1) 26coupe 1)27 funster 1)28 A pick up
Location: Madras Oregon
MTFCA Number: 22802
Board Member Since: 1999

Re: 10 tooth pinion question

Post by Dennis Prince » Sun Feb 05, 2023 5:52 pm

Thank you John, I called and am getting the one that you pointed out. Thanks again. Dennis


speedytinc
Posts: 3838
Joined: Fri Feb 12, 2021 12:24 pm
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Location: orange, ca
MTFCA Number: 14383
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Re: 10 tooth pinion question

Post by speedytinc » Sun Feb 05, 2023 6:38 pm

Wise decision. & you cant go wrong with genuine NOS.

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Mark Chaffin
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Re: 10 tooth pinion question

Post by Mark Chaffin » Wed Feb 08, 2023 1:00 am

No one makes a "new" 42 tooth ring gear. Good luck finding a good used one.

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