32 Auburn Dual Ratio vibration

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15 Apr 2018 23:51 #34467 by wscottcars
wscottcars created the topic: 32 Auburn Dual Ratio vibration
The 2-speed axle in my 32 Auburn coupe shifts fine and is quiet but has a vibration with the axle in low range.

Does anyone have an idea of what would make it vibrate only when it was in low range?

What usually goes wrong with these axles and what should I look for when I take it apart?

Does anyone know what the clearance should be on the two bushings between the sun gear and the internal gear housing?

Thanks for any help. I'll probably start taking it apart tomorrow.
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08 May 2018 14:55 #34596 by RandyEma
RandyEma replied the topic: 32 Auburn Dual Ratio vibration
Hello .Most likely ware in the sun gear pins and bushings. R

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08 May 2018 14:57 #34597 by RandyEma
RandyEma replied the topic: 32 Auburn Dual Ratio vibration
Okay I meant wear in the overdrive unit.R

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10 May 2018 00:03 #34609 by wscottcars
wscottcars replied the topic: 32 Auburn Dual Ratio vibration
Thanks for the reply. I have the Dual Ratio rear end apart now and it looks pretty good. I do have about .012 clearance where the sun gear shaft runs in the case so I am going to replace that bushing. I have no bushing inside the sun gear where it rides on the support hub so I am going to add a bushing there. The sun gear on the left in the picture is out of another rear end and it has a bushing in the sun gear. The support hub is good but it is pot metal so I'm going to replace it with the steel one out of the other rear end. The 5 small gears have .004 clearance on the bushing and I thought I would run them unless someone thinks that is too much. Thanks for the help. Wes
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10 May 2018 03:29 #34610 by mikespeed35
mikespeed35 replied the topic: 32 Auburn Dual Ratio vibration
Don't forget to check the pinion bearing, universal joints and drive shaft. The more revolutions of these items in low range might vibrate but not on less revolutions of high range. Just a thought.
CORDiallyMike

Mike Huffman

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11 May 2018 00:33 #34619 by wscottcars
wscottcars replied the topic: 32 Auburn Dual Ratio vibration
Thanks Mike for the advice to check the U-Joints and drive shaft. I think that they are ok but I will check them a little closer. I think the new bushings are going to stop the vibrations. The one thing that I can't figure out is why the rear end built in real early 32 had a bushing inside the sun gear and the one in my coupe did not. I'm adding that bushing to mine and I hope that it will not cause any problems. Thanks for the help. Wes

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