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  1. #1

    Default tranny slipping not all the time from 3rd to 4th

    hoping someone can tell me what is causing my 2009 2500HD sikverodo 4x4 tranny to slip when it shifts from 3rd to 4th. This does not happen each time, only when cold or after warming up in the morning. Only once or twice then no more. Have had the vaule body cleaned and they found foren material in it. this work for about two weaks then started again. took back and tac said pump rings and seal needs replaced. worked good for four days then here we go again. there are NOT CODES. Anybody have the answer to this????

  2. #2

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    Just to let everyone know. dealer called today and said they finely got tranny to slipp. they found that it is the orings or seals on the pistons in the valve body. they have the parts on order and will be here monday. hope to have truck back monday or tuesday. You be suprized how much fire wood you can get in the trunk and back seat of a toyota camry!! Ha Ha Ha. RENTAL CAR
    Last edited by t101; 04-01-2011 at 08:44 PM.

  3. #3

    Default

    I am glad to see that this issue may have been resolved. Please feel free to keep me informed on the fix either on the forum or via private message. Thank you in advance.

    Tricia, GM Customer Service.

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