AA dual high unit update

AA Ford Discussion Group relating to the repair and restoration of your AA Ford.
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Buckwheat
Posts: 13
Joined: March 5th, 2003, 7:06 am
Model Year: 1930
Location: North Louisiana

AA dual high unit update

Post by Buckwheat »

My dual high unit seems to be fine,, it was my rear end that was locked up. I pulled the rearend this morning it has the same "will not roll" problem that it had on the truck. I still plan to replace the dual high unit with a coupler shaft eventually, since this truck will see alot of use.

In the mean time, I am looking at replacing the 3 speed with a late '29/'30 4 speed and going to the high speed rear end(since I have to rebuild the thing anyway).

Any thoughts or experience with that improvment? Someone has told be the bellhousing may be different and have to be changed also????

buckwheat
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Neil Wilson
Posts: 3062
Joined: February 5th, 2003, 9:42 pm
Body Type: 82-A/89-A
Model Year: 1930
Location: Boulder, CO
Contact:

4-speed installation

Post by Neil Wilson »

You will need the clutch housing for a 4-speed for the conversion.
Regards, Neil Wilson
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Karl_ct

early AA rear end

Post by Karl_ct »

worm gear rear ends don't like to reverse(push start etc.) try applying some torque to the drive shaft input before you rip it apart. I've got a late '29 with a 4 speed, it does use the large bell housing, it has an intermeadiate drive shaft from the back of the transmission to the carrier cross member, this may be a diferent length than the dual high unit. I've got several down at the barn but I won't have time in the near future to check as the barn is in a diferent town. My appologies.
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