Ring gear and pinion

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Haroldc30
Posts: 32
Joined: Sun Jan 06, 2019 12:52 pm
First Name: Harold
Last Name: Chambers
* REQUIRED* Type and Year of Model Ts owned: 1925 fordor. 1923 touring
Location: Winfield tn.
MTFCA Number: 50278

Ring gear and pinion

Post by Haroldc30 » Wed Nov 13, 2019 10:35 am

Hello everyone. Thanking about changing my pinion gear.I've got a 11tooth pinion and a 40 tooth ring gear can I use a 10 tooth pinion on the 40 tooth ring gear. Thanks in advance Harold

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TonyB
Posts: 663
Joined: Fri Jan 04, 2019 11:15 am
First Name: Tony
Last Name: Bowker
* REQUIRED* Type and Year of Model Ts owned: 1914 touring
Location: La Mesa, CA
MTFCA Number: 32
MTFCA Life Member: YES
Board Member Since: 2005

Re: Ring gear and pinion

Post by TonyB » Wed Nov 13, 2019 10:43 am

Yes.
I did quite successfully on the Town Car. It required a little more effort than an 11 tooth pinion but just a few shims.
Tony Bowker
La Mesa, California
1914 Touring, 1915 Speedster, 1924 Coupe.


Aarongriffey
Posts: 67
Joined: Sat Jan 12, 2019 10:30 pm
First Name: Aaron
Last Name: Griffey
* REQUIRED* Type and Year of Model Ts owned: 1926 touring
Location: Hayward, ca.

Re: Ring gear and pinion

Post by Aarongriffey » Fri Nov 15, 2019 1:02 am

I built a speedster with a Warford aluminum three speed and a 10 tooth pinion.
The 10 tooth was made to run against the stock ring gear.
The gout to one rear end gives you plenty of power in direct Warford or high Ruxtell.
But....if going up a slight upgrade if you run in high Ruckstell or direct Warford the motor is running very fast to tour with stock T’s.
If you run in overdrive Warford the engine will overheat from running too slow and lugging.
If you run in underdrive Warford or low Ruckstell everybody with the stock setup will overheat because their engines will be running too slow.
We found I just could not lead tours with that setup. The 3:63 overall gear ratio is by far the best in hilly country.


Original Smith
Posts: 3284
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First Name: Larry
Last Name: Smith
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Re: Ring gear and pinion

Post by Original Smith » Fri Nov 15, 2019 10:38 am

Unless you do a lot of driving on mountain roads, I would suggest sticking with the stock ratio.


John kuehn
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Location: Texas
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Re: Ring gear and pinion

Post by John kuehn » Fri Nov 15, 2019 10:48 am

Changing the differential gears from original has shown to be questionable after years of reading different outcomes on the forum. More than a few have noted that overall leaving the original gear ratio is the best way to go. Different opinions on this will always arise.


Joe Bell
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* REQUIRED* Type and Year of Model Ts owned: 24 Fordor
Location: Tiffin Ohio
MTFCI Number: 24066

Re: Ring gear and pinion

Post by Joe Bell » Fri Nov 15, 2019 11:16 am

If you are pulling hills all the time the ten tooth is great but if you are flat lands I would run the eleven tooth.

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