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  1. #1

    Default Transmission help ....please

    Hey everyone.

    I'm back.

    I have an 02 Chevy Suburban.

    A couple days ago I noticed it was making a LOUD rattling, clanking noise from under the truck.

    I crawled under the next day, and left the engine running so I could find the noise.

    I worked my way back to the transmission and it is REALLY loud right underneath the transmission pan.

    I have no idea what the problem could be.

    Does anyone have any ideas?

    Thanks !

  2. #2


    The only advice I can give you is to pull the pan, and see if anything doesn't look right.

    1991 Suburban

  3. #3


    did you check the fluid level?

  4. #4
    stephan's Avatar
    Join Date
    Sep 2010
    Far West, Oregon USA,
    Blog Entries


    Is this rattleing noise more to the front where the torque converter is?
    Is your trans still shifting & operating normally?
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol

  5. #5


    Good point, Stephan! I forgot about that. My truck was making some serious metal on metal sounds while under torque. Took me a couple of days to figure out that one of the torque converter bolts had walked out and was hitting the dust shield!

  6. #6
    stephan's Avatar
    Join Date
    Sep 2010
    Far West, Oregon USA,
    Blog Entries


    I've seen 3 instances of those noises in the TC area Jess. One was a bolt backing out like your was, the second was a cracked/broken flex plate that was allowing the ring gear to grind away on the starter gear under acceleration, & the third was a T C balance weight that the spot weld had broken loose on one end & was slapping the dust cover.
    I'm hoping that the posters noise is coming from this area instead of the trans pan because these are cheaper to fix than a trans rebuild.

  7. #7


    I definitely agree, Stephan. With the fact that Turbolag didn't mention the transmission malfunctioning, I would say that this is a definite possibility!

  8. #8


    Hey everyone. Thanks for all of your replies.

    It turns out it wasn't the transmission ! ...Whew... One of the catalytic converters broke apart on the inside.

    Its fixed now. One new cat.

    Man, 200 for a cat.

  9. #9


    glad you found the problem and that it wasnt the tranny.
    2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Granatelli MAF sensor, Throttle body spacer, Magnaflow exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer ST) and 4.10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, extended stainless steel brake lines, firestone airbags w/onboard air compressor, Pioneer Avic X940BT navigation, Accel backup camera.
    1960 Land Rover Series II 88
    2001 Pontiac Sunfire
    2013 Toyota Avalon Limited (Wife's Car)
    NRA Life Member

  10. #10


    Thanks man. I'm glad it was something simple.

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