I have found a salvage yard that has several '28-'29 rear axle assemblies with the worm drive differentials. Are they any significance anymore.
Mike
worm drives
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Bradshaw
- Posts: 92
- Joined: January 16th, 2003, 2:45 pm
- Body Type: 82A Cab 89A Express
- Model Year: 1929
AA Worm Drives
Mike,
Yes, the worm drives are significant. The 28/29 AA's had them.
They are more desirable if they have the high speed gears.
The ratio would be 5.17:1
If the gears have not been swapped out, you can identify the high speed rear axles by the letter B stamped on the housing on the driver's side.
The corresponding speedometer gears(drive gear and driven gear) would also be desirable.
Folks with AA's and a low speed gear set may be looking to upgrade for more top end speed.
I'm sure that the bearings and internal parts may be worth saving too.
BrAdshAw
Yes, the worm drives are significant. The 28/29 AA's had them.
They are more desirable if they have the high speed gears.
The ratio would be 5.17:1
If the gears have not been swapped out, you can identify the high speed rear axles by the letter B stamped on the housing on the driver's side.
The corresponding speedometer gears(drive gear and driven gear) would also be desirable.
Folks with AA's and a low speed gear set may be looking to upgrade for more top end speed.
I'm sure that the bearings and internal parts may be worth saving too.
BrAdshAw