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  1. #1
    Jr. Mechanic b-radical's Avatar
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    Default transmission clink when in reverse.

    Hey everybody, I have a 2000 4.8l Silverado 2wd. when i put it in reverse i hear a clink/clunk sound. Sometimes, if I put it in drive, and then in reverse I wont hear the sound. Can anyone tell me if this is needs attention?
    Thanks
    Charles


    2000 Silverado, 4.8L, LS
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  2. #2
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    stephan's Avatar
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    Is it coming from the rear end or the trans? Have a helper do the shifting while you listen outside the truck. I've heard a lot of rear ends make this clinking sound while sitting still & shifting because it is echoing up the drive shaft. It's a fairly deep sounding clunk but vibrating foreward through the thin walled drive shaft makes it sound higher pitched & more of a "clinking" noise like you describe, rather than a clunk.
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  3. #3
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    Default

    But Please do not !!! Get under the truck to find the click...
    08 Z71 Avalanche Mods to date: K&N CAI,Hellwig Swaybars and End Links, Corsa Sport Exhaust, Superchips Programer,IPCW LOF & 3rd brake light and tails, AMI Gas door,Show Hooks and Door locks, Enkei Wheels, with Pirelli tires, StreetScene Bowties, Grant Steering wheel,Muth signal mirrors,SSBC Big Brake kit,Huskyliner Mug gards,Floor mats and Hood shield, McGard Lug nuts and locks, Bedrug, Cervini's Ram Air hood,35watt HID Fog lights, Sylvania bulbs all around ZXE's Highs and Lows, WhiteNight Back up lights,Sirius and HD Radio, SnugTop sitting on deck now Got a Softopper on now,Tempress Boat Hatches.... New Bilstein shocks are on... New Mods coming soon..... X

  4. #4

    Default

    Its probably your slip yoke. Common on our trucks. Take you drive shaft off on a level surface. (no trans fluid will drip out) Buy some marine grade bearing grease and pack the slip yoke with it. (not completely full just a good amount) Makesure to get it in the threads. Then reinstall install the drive shaft. Will be hard to fully seat the slip yoke on output shaft but will go as it forces the air out and grease spreads. Makesure all tight and go for a drive. This is the fix per GM. Will have to do it every 6mths or so.

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  5. #5
    Jr. Apprentice
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    Default

    It may be just a u-joint also , park the truck on level surface and set parking brake. then put trans. into park so there is no load on driveshaft. Then crawl under and try and wiggle the driveline up or down or back and fourth and see if there is any play in either u-joint.

  6. #6
    Jr. Engineer racekid91's Avatar
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    Mine was doing the same thing as what you said your's is doing. I swapped in my spare driveshaft, and a new u-joint. No more clunk. Check your u-joint, and check your slip yoke. It's either one, or the other, or both.

    1995 Chevy Tahoe

  7. #7
    Sr. Engineer IPFK83's Avatar
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    Default

    Most definitely check your u-joints and grease the slip yoke as already said.

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  8. #8

    Default

    i dont know if anybody mensioned it already ...but i would check the tranny mount !!!!!!!!!! its 95% of the time that this is the case for a clinking or clunking noise when in reverse....

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  9. #9
    Jr. Mechanic b-radical's Avatar
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    cool, Thanks for all the good advice. I will make a list and check off each item as I repair it. I will also post back with updates. Thanks again guys

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