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Old 05-20-2013, 12:04 AM
diesel man mark diesel man mark is offline
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Default Tranny failure ??

I own a 2002 ram 2500 4x4, cummins diesel automatic,,the tranny is going in & out of drive ,,seems like it goes into nuetral for a second then back into gear,,only happens in 3rd & overdrive,,worse when cold ,,truck has 156k on it,,is this a sign of tranny failure ? pressure loss ? can I adjust bands ? thanks in advance for the input,, Mark
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Old 05-20-2013, 07:31 AM
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JVMopar JVMopar is offline
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Is the fluid burnt? (black and nasty smelling)

There are no bands applied in 3rd or OD

Are there any transmission codes stored in the computer?
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Old 05-20-2013, 04:53 PM
John Kunkel John Kunkel is offline
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Your tachometer will tell you the rpm rise when it seems to go out of drive, could be the converter unlocking which will give you a 200 or so rpm rise or it could actually be kicking out of OD which will give you a several hundred rpm rise. The converter unlocking is a known problem and it's caused by electrical interference; it can also be caused by a faulty TPS or misadjusted brake light switch.

With that many miles I would pull the pan and replace the filter...a clogged filter will cause your problem.
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Old 05-25-2013, 08:56 PM
diesel man mark diesel man mark is offline
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The fluid is NOT burnt,,I drain the pan every time I change engine oil,,I have installed a drain plug in the tranny pan,,makes it easy,,the fluid I drain out seems as clean as the new stuff i put back in,,converter locking & unlocking seems logical,,I,ll look into it,,,Thanks
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Old 05-26-2013, 02:19 PM
John Kunkel John Kunkel is offline
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Here's a link to one commentary on the problem, a Google search will find others.

http://www.kentsoil.com/dodgebug1.htm
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