Gear ratio
Gear ratio
Is it possible to chance the gear ratio on my 1928 AA with a worn drive rear end. Please advise
- spectria
- Posts: 1874
- Joined: May 15th, 2008, 9:53 pm
- Body Type: Mail Truck, Stakebed
- Model Year: 1931
- Location: Quincy, Ca.
Re: Gear ratio
Yes, you would need the set of worm and worm drive gears that you prefer.Wickstop wrote:Is it possible to chance the gear ratio on my 1928 AA with a worn drive rear end. Please advise
Do you know what ratio you have now?
Dave in Quincy, Ca. I love Pics!!!! Post them All!!!
Join the Ford Model AA Truck Club - membership form at http://www.fmaatc.org
Join the Ford Model AA Truck Club - membership form at http://www.fmaatc.org
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- Posts: 753
- Joined: August 11th, 2013, 4:25 pm
- Body Type: 82-A Platform
- Model Year: 1928
- Location: Hamilton, Mich.
Re: Gear ratio
Wickstop wrote:Is it possible to chance the gear ratio on my 1928 AA with a worn drive rear end. Please advise
Yes: The worm and Ring can be changed. The low speed, 7:25 to 1 ratio has an "A" stamped on the rear drivers side of the housing. The high speed is 5:17 to 1 with a "B" stamped on the housing. I am in the process of the same thing. (but still scratching my head if it is the right thing to do for my truck and it's history).
KVO
KVO
Dec. '28 AA
Dec. '28 AA
- 1crosscut
- Posts: 877
- Joined: December 25th, 2010, 7:22 pm
- Body Type: 82-A
- Model Year: 1929
- Location: Lincoln, NE
Re: Gear ratio
KVO - If I were you I wouldn't hesitate to switch out the gears in your rear end to a set of high speed gears. Everything is internal and no one will know it was done except you will go a bit faster. Mine was at one time a low speed rear end and the gears were switched out to high speed gears long before I got it.KimVanOrder wrote:Wickstop wrote:Is it possible to chance the gear ratio on my 1928 AA with a worn drive rear end. Please advise
Yes: The worm and Ring can be changed. The low speed, 7:25 to 1 ratio has an "A" stamped on the rear drivers side of the housing. The high speed is 5:17 to 1 with a "B" stamped on the housing. I am in the process of the same thing. (but still scratching my head if it is the right thing to do for my truck and it's history).
KVO
The hard part is finding good high speed gears to make the switch.
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Dave
Dave
- blgitn
- Posts: 201
- Joined: July 6th, 2013, 6:36 am
- Body Type: 275-A
- Model Year: 1931
- Location: West Point, VA 23181
Re: Gear ratio
Does anybody make other ratios?
I'd be interested in something like a 4:1, instead of searching for a warford.
I'd be interested in something like a 4:1, instead of searching for a warford.
R/ Roger.
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- Posts: 1223
- Joined: June 14th, 2007, 7:29 pm
- Body Type: Grainbox
- Model Year: 1929
- Location: Illinois
Re: Gear ratio
Not that i know of...warford is pretty much only way to knock ratio down even more...
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- Posts: 1442
- Joined: April 24th, 2003, 11:50 am
- Body Type: Mail truck, Stake tr
- Model Year: 1931
- Location: SO CAL
Re: Gear ratio
You could install a Mitchell overdrive or the 4-speed with 4th overdrive.
Bob
Bob
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- blgitn
- Posts: 201
- Joined: July 6th, 2013, 6:36 am
- Body Type: 275-A
- Model Year: 1931
- Location: West Point, VA 23181
Re: Gear ratio
Wow! I didn't know you could get a Mitchell for an AA. What ratios are available? Who's running one and what do you think?
R/ Roger.