High Speed Rear?

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wv model AA
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Body Type: Dump truck
Model Year: 1931
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High Speed Rear?

Post by wv model AA » October 2nd, 2014, 6:53 am

There a guy who's selling a Front & Rear Axle on EBAY. See link below.

http://www.ebay.com/itm/Restored-1930-3 ... 1664883965

My Question....is there 2 different axle gear ratio(s) for 1930-31? If so, what's the difference and what's the high end on mph?
West Virginia Model AA

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Chris Haynes
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Re: High Speed Rear?

Post by Chris Haynes » October 2nd, 2014, 8:43 am

Yes there were two different ratios available. Standard and high speed.

bud valerius
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Location: Manhattan , Kansas

Re: High Speed Rear?

Post by bud valerius » October 2nd, 2014, 9:07 am

6.6 to one & 5.14 to one

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wv model AA
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Body Type: Dump truck
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Re: High Speed Rear?

Post by wv model AA » October 2nd, 2014, 9:24 am

What would be the top speed expected with a 5.14 verses a 6.6?
West Virginia Model AA

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Chris Haynes
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Re: High Speed Rear?

Post by Chris Haynes » October 2nd, 2014, 9:58 am

Wide open mine would do 55. I am now adding a Warford auxiliary transmission that has a 12% overdrive.

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Neil Wilson
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Re: High Speed Rear?

Post by Neil Wilson » October 2nd, 2014, 12:30 pm

AA Truck Speeds for an engine rpm of 2600 is shown below. I think 2600 rpm is a good cruising speed for the engine.
Attachments
AA Truck Speeds - Standard - 2600 engine rpm.jpg
AA Truck Speeds - Standard - 2600 engine rpm.jpg (145.84 KiB) Viewed 5177 times
Regards, Neil Wilson
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AAholic
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Re: High Speed Rear?

Post by AAholic » October 2nd, 2014, 4:49 pm

Weren't the high speed rear ends stamped and tagged with the numbers 7-36 and the standard "low speed" rear ends left un stamped?

Reds34
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Re: High Speed Rear?

Post by Reds34 » October 2nd, 2014, 6:17 pm

Does that rear axle nut look funny to anybody else?

Red

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spectria
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Model Year: 1931
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Re: High Speed Rear?

Post by spectria » October 2nd, 2014, 6:48 pm

Reds34 wrote:Does that rear axle nut look funny to anybody else?

Red
Yes :)
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BrianT
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Re: High Speed Rear?

Post by BrianT » October 2nd, 2014, 8:33 pm

Reds34 wrote:Does that rear axle nut look funny to anybody else?

Red
Looks as if the drum was put on without lining up the keyway, the nut looks to be correct.

Reds34
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Re: High Speed Rear?

Post by Reds34 » October 3rd, 2014, 5:16 am

I think there is something fishy with that rear axle. The rear axle nut is barely screwed on to the axle, but the drum seems to be in the correct place when compared to the backing plate.

Red

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tiredtruckrestorer
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Re: High Speed Rear?

Post by tiredtruckrestorer » October 5th, 2014, 1:05 pm

Maybe somebody replaced the axle shaft with the wrong one. There were 3 different lengths, one for 28-29 without separate emergency brakes and another one with emergency brakes, and then another length for the 30-31 bevel gear.

Keith

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wv model AA
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Re: High Speed Rear?

Post by wv model AA » October 16th, 2014, 4:45 pm

So the question: Is high speed rear ends stamped and tagged with the numbers 7-36 and the standard "low speed" rear ends left un stamped?

Can someone answer this?

Thanks,
Jeff
West Virginia Model AA

"Hold My Beer and Watch This..."

KimVanOrder
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Re: High Speed Rear?

Post by KimVanOrder » October 19th, 2014, 5:00 pm

wv model AA wrote:So the question: Is high speed rear ends stamped and tagged with the numbers 7-36 and the standard "low speed" rear ends left un stamped?

Can someone answer this?

Thanks,
Jeff

My understanding is the Low speed housing has an "A" stamped on it. The high speed has a "B" stamped on it. This is for the Worm style rear ends.
KVO
Dec. '28 AA

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AAholic
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Re: High Speed Rear?

Post by AAholic » October 19th, 2014, 7:11 pm

I assume you are referring to the worm drive rear end, my bevel gear housing is stamped 7-36 on the lower edge where the two halves are joined in the middle as well as having a tag with the same numbers which are the number of teeth on the pinion and ring gear if I am not mistaken.
I recently looked at another rear end that had no tag nor any apparent stamped numbers, the speedo gear was stamped 6.6

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