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  1. #1

    Default Transmission or other Drive line issues???

    2002 suburban 4x2 105000 mi...just had 90K mile factory recommended service/PM,(all fluids done).
    Engaging transmission into D or R from Park is a hard or rough engagement. once driving, shifts up thru the gears nice and smooth. When first speeding up or when slowing back down, under 25 mph, clicking noise is heard and felt from the rear end. Also, at 65mph and above there is a substantial vibration. I have had the Michelin tires rotated and balanced, dont know if all of this is realated.
    Any ideas before I take it in and someone wants to sell me a new transmission? Is this tranny, rear diff, any other driveline issue?
    Last edited by sgodder; 10-01-2008 at 02:47 PM. Reason: left out info...

  2. #2


    Next thing I would look at would be the u-joints in the driveshaft. I don't know if you have drum brakes or disck brakes in the rear, but, if you have drum brakes, I might also pull the drums off and make sure something hasn't come loose. Where you just had the fluids changed, you might make sure they filled the rear diff up full and that the fluid looks clean. I would probably also check the transmission fluid level that they got it correct.
    '98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
    '92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
    "My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World

  3. #3

    Default transmission or driveline issue

    SGODDER a clunk when going from rev. to dr.,105k miles,trans shifts ok,and a clicking noise at hiway speeds is a classic u-joint MRSHORTY in my opinion is correct ding!ding!ding! good luck

  4. #4
    Jr. Apprentice CoolAirVw's Avatar
    Join Date
    Nov 2008
    Kansas City, MO


    Some trouble codes can cause a "high line pressure failsafe" in the transmission. Computer notices something, triggers a code then makes the trans shift hard trying to protect it.

    Scan computer system for codes, after you check your u-joints.

    Also the pressure control solenoid can stick causing "high line" as well.

  5. #5

    Default follow up

    I thought I owed you guys what the problem actually was and that is a bad driveshaft and u joints. I had the it all replaced and it is running like a charm. Thanks for all the help!
    Last edited by sgodder; 12-04-2008 at 01:43 PM. Reason: spelling

  6. #6
    Jr. Apprentice CoolAirVw's Avatar
    Join Date
    Nov 2008
    Kansas City, MO


    Thanks for posting the fix.

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