Speedo drive gear help

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Wmegilljr
Posts: 18
Joined: February 9th, 2018, 9:15 pm
Body Type: Stake body
Model Year: 1928
Location: Las Vegas, NV

Speedo drive gear help

Post by Wmegilljr » February 17th, 2018, 8:01 pm

Well I worked on the truck for almost 9 hours today with out stopping and it paid off! Truck is running great, all the lights now work, changed engine and trans oil. But i have an issue with getting the Speedo to work. I ordered a drive gear from mikes that will not work not knowing that the A and the AA are very different in regards to how they are assembled. I think what I need is part number AA-17271-FR. That is for the low speed axle with the round slotted output, round tabed Speedo cable going to the oval Speedo.

Question is where can I find one!? Snyder's only has a high speed square drive for the round Speedo.

The truck has a 1930+ low speed bevel gear dually rear.

Stakebed
Posts: 1172
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: Speedo drive gear help

Post by Stakebed » February 17th, 2018, 10:50 pm

Someones gotta have a low speed bevel gear uhh gear haha. No demand at all for low speed parts. Or call Berts in denver - they would probably have one.

KimVanOrder
Posts: 456
Joined: August 11th, 2013, 4:25 pm
Body Type: 82-A Platform
Model Year: 1928
Location: Hamilton, Mich.

Re: Speedo drive gear help

Post by KimVanOrder » February 18th, 2018, 4:43 pm

I have not done it but, Can you modify the one you have?
KVO
Dec. '28 AA

1wonton
Posts: 127
Joined: August 31st, 2013, 4:37 pm
Body Type: Express
Model Year: 1929
Location: Vallejo, Ca

Re: Speedo drive gear help

Post by 1wonton » February 19th, 2018, 7:38 am

I have a couple of these if you still need one. $20 plus shipping, $35 for both gears.

ron

Wmegilljr
Posts: 18
Joined: February 9th, 2018, 9:15 pm
Body Type: Stake body
Model Year: 1928
Location: Las Vegas, NV

Re: Speedo drive gear help

Post by Wmegilljr » February 19th, 2018, 2:30 pm

The ones you have are for the low speed rear?

1wonton
Posts: 127
Joined: August 31st, 2013, 4:37 pm
Body Type: Express
Model Year: 1929
Location: Vallejo, Ca

Re: Speedo drive gear help

Post by 1wonton » February 19th, 2018, 3:11 pm

Yeah, 7.17-7.25 stamped on the gears.

ron

1wonton
Posts: 127
Joined: August 31st, 2013, 4:37 pm
Body Type: Express
Model Year: 1929
Location: Vallejo, Ca

Re: Speedo drive gear help

Post by 1wonton » February 19th, 2018, 3:16 pm

Maybe I didn't understand what you're looking for. Are you referring to the gears on the driveshaft or something else? Anyway, I have the gear that fits onto the driveshaft and the driven gear that drives the speedo cable. You have to pull the rear end back to replace the driving gear. There's a retainer clip in front of the driving gear (sometimes this is missing and I don't think you really need it anyway).

ron

Wmegilljr
Posts: 18
Joined: February 9th, 2018, 9:15 pm
Body Type: Stake body
Model Year: 1928
Location: Las Vegas, NV

Re: Speedo drive gear help

Post by Wmegilljr » February 19th, 2018, 3:44 pm

That's exactly what I need. The gear is on the drive shaft, I am missing the one the goes to the cable. But i will take the whole set. Please pm me your info and how you want to handle it. Thank you so much!

Bob C
Posts: 1175
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: Speedo drive gear help

Post by Bob C » February 19th, 2018, 5:59 pm

He's looking for gears for the 6.6 bevel gear axle not the 7.17 worm drive gears.

Bob

Wmegilljr
Posts: 18
Joined: February 9th, 2018, 9:15 pm
Body Type: Stake body
Model Year: 1928
Location: Las Vegas, NV

Re: Speedo drive gear help

Post by Wmegilljr » February 20th, 2018, 8:10 am

Bob, my understanding is that it will work and be much closer than the 5.17 gear.

from another site

AA-17271-E Speedometer driven gear (Service). Stamped 7.17 or 7.25 on face. AA-17285-E Speedometer driving gear (Service). Used on AA chassis with worm or bevel axles “low speed” of 7 .25 to 1 ratio for worm and 7 .17 to 1 ratio for bevel axles.

AA-17271-E has 18 teeth and is same type as AA-17271-D. Outside diameter of gear is 1.005/1.008. AA-17285-E has 4 teeth. Outside diameter is 1.744/1.746.

Bob C
Posts: 1175
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: Speedo drive gear help

Post by Bob C » February 20th, 2018, 11:06 am

It may work but the 7.17 ratio bevel gear they are talking about in the one in
the picture not the 6.6 1930-31 type.

Bob
x29 Stake 52585 01-28-1929.jpg
x29 Stake 52585 01-28-1929.jpg (81.71 KiB) Viewed 679 times

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Neil Wilson
Posts: 2589
Joined: February 5th, 2003, 9:42 pm
Body Type: 82-A/89-A
Model Year: 1930
Location: Boulder, CO
Contact:

Re: Speedo drive gear help

Post by Neil Wilson » February 20th, 2018, 1:40 pm

Wmegilljr wrote:
February 17th, 2018, 8:01 pm
I think what I need is part number AA-17271-FR. That is for the low speed axle with the round slotted output, round tabed Speedo cable going to the oval Speedo.

Question is where can I find one!? Snyder's only has a high speed square drive for the round Speedo.

The truck has a 1930+ low speed bevel gear dually rear.
FYI - Based on my research - A 1930 AA with an oval speedometer and with a 6.6:1 rear axle would have speedometer driven gear with a slotted shaft under part AA-17271-F as you indicate. This speedometer gear would have 17 teeth and have a 0.955 OD. Drive gear AA-17285-G was used with this driven gear (4 teeth and 1.795 OD). Other speedometer gear parts will not interchange.

If the AA-17271-F can not be found, then AA-17271-G could be used if the speedometer shaft could have the keyed end changed to a square end. Maybe a speedometer shop can do this.

Sorry, I don't know a source for what you are looking for.
Regards, Neil Wilson
______________________________________
neil@aafords.com - use this email for contact
www.aafords.com - AA information and photographs

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