connecting shaft/Speedometer drive gear

AA Ford Discussion Group relating to the repair and restoration of your AA Ford.
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cokefirst
Posts: 33
Joined: May 16th, 2013, 10:13 am
Body Type: stake
Model Year: 1931

connecting shaft/Speedometer drive gear

Post by cokefirst » January 24th, 2020, 9:22 pm

I am looking for some technical advice and perhaps a parts source. I have a 1931 AA 131 wheelbase stake body truck. I have damaged three speedometer driven gears over the past several years. I jacked up the back of the truck and had someone look at the drive gear on the shaft as it was rotated. There is about 1/16" of up and down movement in the shaft. I believe that this is damaging the driven gear.

I have seen a diagram of the standard Model A and there is a barrel bearing and a bushing that I assume keeps the shaft aligned and tight. Are these similar type parts used on the AA? Does anyone have a diagram of this section of the driveshaft? I believe if I remove the play in that shaft, it will solve the damage issue with the speedometer driven gear. Any suggestions????
Last edited by cokefirst on February 1st, 2020, 1:34 pm, edited 1 time in total.

Bob C
Posts: 1306
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: connecting shaft/Speedometer drive gear

Post by Bob C » January 25th, 2020, 8:36 am

I think you are right, the bearing or shaft is worn.

Bob
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AA-4802-BP1.jpg
AA-4802-BP1.jpg (507.45 KiB) Viewed 877 times

cokefirst
Posts: 33
Joined: May 16th, 2013, 10:13 am
Body Type: stake
Model Year: 1931

Re: connecting shaft/Speedometer drive gear

Post by cokefirst » January 25th, 2020, 9:01 am

Thank you so much for the diagram and information. I assume that the shaft is long out of production and, if the shaft is worn, it will have to be replaced with a good used one. If I am correct, the bearing and bushing basic number is 4645 and 4655 respectively. Based on that, the part for the AA should be AA-4645 and AA-4655. Are these parts available anywhere?

Bob C
Posts: 1306
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: connecting shaft/Speedometer drive gear

Post by Bob C » January 25th, 2020, 12:00 pm

The parts show up on Ebay once in a great while. You might try Bert's https://modelastore.com/
or Fred at Southside Obsolete http://www.southsideobsolete.com/Souths ... lcome.html
He is on the Early V8 section of Ford Barn as Barnfind08, deals mostly in early V8 parts but I've got some AA parts from him.

Bob

cokefirst
Posts: 33
Joined: May 16th, 2013, 10:13 am
Body Type: stake
Model Year: 1931

Re: connecting shaft/Speedometer drive gear

Post by cokefirst » February 2nd, 2020, 1:59 pm

Thank you for the help. I found the bearing at Smith and Jones Antique Auto Parts. However, they do not list the race or sleeve. I will continue the search. Thanks again

cokefirst
Posts: 33
Joined: May 16th, 2013, 10:13 am
Body Type: stake
Model Year: 1931

Re: connecting shaft/Speedometer drive gear

Post by cokefirst » February 3rd, 2020, 10:10 pm

False alarm, Smith and Jones list the part but do not have it. Back to the drawing board. Thanks

dlevy
Posts: 53
Joined: April 12th, 2016, 9:20 pm
Body Type: 82B
Model Year: 1931

Re: connecting shaft/Speedometer drive gear

Post by dlevy » February 4th, 2020, 5:27 am

Hi,
Is this what you are looking for?
https://www.ebay.com/itm/NEW-1928-48-Fo ... Sw-W5UzF3s
Has the correct part number from the book: 4655 & 4645.
Dave
Attachments
Part No's 4645 and 4655.jpg
Part No's 4645 and 4655.jpg (23.09 KiB) Viewed 264 times
IMG_7426.JPEG
IMG_7426.JPEG (260.69 KiB) Viewed 264 times

Bob C
Posts: 1306
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: connecting shaft/Speedometer drive gear

Post by Bob C » February 4th, 2020, 8:30 am

The ones on Ebay are for cars, they have the wrong prefix for the part number.

Bob

cokefirst
Posts: 33
Joined: May 16th, 2013, 10:13 am
Body Type: stake
Model Year: 1931

Re: connecting shaft/Speedometer drive gear

Post by cokefirst » February 5th, 2020, 11:18 am

I found the race at Burt's Model A in Colorado but they do not have the bearing. They have the race listed as BB-4645. I did check and found that there is a corresponding BB-4655-A2 bearing. Is that a correct replacement? Was the BB-4655-A2 a superseded part number for the AA-4655?

Bob C
Posts: 1306
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: connecting shaft/Speedometer drive gear

Post by Bob C » February 5th, 2020, 1:00 pm

BB bearing and sleeve wont work as the BB driveshaft is larger diameter than the AA.

Bob

User avatar
1crosscut
Posts: 826
Joined: December 25th, 2010, 7:22 pm
Body Type: 82-A
Model Year: 1929
Location: Lincoln, NE

Re: connecting shaft/Speedometer drive gear

Post by 1crosscut » February 5th, 2020, 2:36 pm

Call Steve at South Shore Bearing. He should be able to help you out.
https://southshorebearing.com/
------------
Dave

cokefirst
Posts: 33
Joined: May 16th, 2013, 10:13 am
Body Type: stake
Model Year: 1931

Re: connecting shaft/Speedometer drive gear

Post by cokefirst » February 5th, 2020, 5:08 pm

Thank you, an Email has been sent

User avatar
1crosscut
Posts: 826
Joined: December 25th, 2010, 7:22 pm
Body Type: 82-A
Model Year: 1929
Location: Lincoln, NE

Re: connecting shaft/Speedometer drive gear

Post by 1crosscut » February 13th, 2020, 8:36 pm

Was Steve able to help?
------------
Dave

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