I’m diving in to the disassembling, inspection, and restoring the worm drive rear axle on my late 1928 AA. There is a round tag hanging from the safety wire on the bolts for the tube to differential housing. Does anyone know what this might be for? There are no numbers or letters stamped in the tag, so I assume there was probably an information decal on the tag at one time. Didn’t know if this was placed on there at the factory or if it was to show some kind of service work performed in field?
Thanks,
Doug
Worm drive tag
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- Posts: 49
- Joined: September 4th, 2019, 7:50 pm
- Body Type: 88-A
- Model Year: 1928
- Location: New Berlin, IL
Worm drive tag
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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: Worm drive tag
It may be to show the gear ratio has been changed from what is stamped on the housing.. So you will have to check the ratio. Can do via counting drive shaft rotations to wheel rotation. Be sure to keep the tag!!!
KVO
Dec. '28 AA
Dec. '28 AA
- Chris Haynes
- Posts: 2204
- Joined: September 7th, 2003, 5:18 pm
- Body Type: 82A
- Model Year: 1930
- Location: Camarillo, CA
Re: Worm drive tag
Or, if the speedometer is accurate, look at the ratio stamped on the speedo drive gear.KimVanOrder wrote: ↑January 31st, 2021, 8:32 amIt may be to show the gear ratio has been changed from what is stamped on the housing.. So you will have to check the ratio. Can do via counting drive shaft rotations to wheel rotation. Be sure to keep the tag!!!
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- Posts: 49
- Joined: September 4th, 2019, 7:50 pm
- Body Type: 88-A
- Model Year: 1928
- Location: New Berlin, IL
Re: Worm drive tag
The housing is stamped with the letter “B” to indicate the 5.17:1 gear ratio. Truck is equipped with the dual high option, so I would assume that the gear ratio is the high speed. I’m wondering if the end cap for the screw thrust bearing was replaced under a recall? The safety wire was not on the four bolts? I’ll know more once it is apart!
- Chris Haynes
- Posts: 2204
- Joined: September 7th, 2003, 5:18 pm
- Body Type: 82A
- Model Year: 1930
- Location: Camarillo, CA
Re: Worm drive tag
The '30/'31 High Speed units had a brass tag. Some with a number and others without.
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- Posts: 49
- Joined: September 4th, 2019, 7:50 pm
- Body Type: 88-A
- Model Year: 1928
- Location: New Berlin, IL
Re: Worm drive tag
I finally got it disassembled and counted number of teeth. Ring gear has 31 teeth and the pinion(worm gear) has 6 which yields 5:17:1gear ration, high speed gear. Still guessing what the brass tag was for?
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- Posts: 753
- Joined: August 11th, 2013, 4:25 pm
- Body Type: 82-A Platform
- Model Year: 1928
- Location: Hamilton, Mich.
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- Posts: 49
- Joined: September 4th, 2019, 7:50 pm
- Body Type: 88-A
- Model Year: 1928
- Location: New Berlin, IL
Re: Worm drive tag
Must be something to it! It would be interesting to know the purpose.