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Case Tractors Discussion Forum

401 Trans Noise

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01-11-2007 17:07:28

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I have a 400,I think it is a 1956,it is low on hours and in great shape,other then it has a powerful scream coming from the Transmission.My Dad when he was alive had a Tech look at it and didnt tear down,because from looking in from the top eveything looked good and tight.But let me tell you if you "road" this thing,you need a good stiff Brandy after you get off of it,cause the noise is terrible!Do you feel this might be the range shaft bearings?

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Roger (Mi)

01-12-2007 07:08:17

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 Worn gears? in reply to Ande, 01-11-2007 17:07:28  
Straight cut gears (which the 400 has) become noisy with use and wear. A noisy shock wave occurs when one tooth releases before the next one makes contact. The only good cure is new gears and perhaps bearings for the high range.

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Doc Larry

01-12-2007 04:50:29

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 Re: 401 Trans Noise in reply to Ande, 01-11-2007 17:07:28  
Are you fairly certain the noise is in the transmission rather than farther back in the differential?


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01-11-2007 17:23:08

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 Re: 401 Trans Noise in reply to Ande, 01-11-2007 17:07:28  
I know what you mean,
My '56 400 is noisy in high range.
I don't go on the road very much, but when I do..... ...I need ear plugs.

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