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#1
09-16-2004, 12:32 AM
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Shaking over 70 mph
I have a 2001 silverado with the 5.3L, and when I get going over 70 mph on the freeway, I notice a considerable amount of shaking. I hope this is not normal, and that someone could PLEASE let me know what my options are. Thanks
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#2
09-16-2004, 01:37 AM
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Re: Shaking over 70 mph
Do you hear a loud "clonck" noise when you shift into reverse and accelerate? Also get under the bed and see if the driveshaft isnīt loose, grease it up if needed (oh sorry, forgot they joints are sealed now) if the universal joints are worn out, replace them with one you can refill with grease, they last longer.
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#3
09-16-2004, 09:26 AM
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The "clonck" isn't incredibly loud when I shift, but I do notice it. I don't know much at all about cars, so what should I be on the look out if I take this into a shop? Thanks for your help
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#5
09-16-2004, 03:07 PM
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Re: Shaking over 70 mph
if your u joints arem the factory sealed joint have them replaced with greasable joints. Mine failed major at 45,000 miles ...JJ
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2000 Silverado Victory Red, standard cab, short bed, short wheelbase, 4X4, 4.8L, 5 speed, 4:10 locking rear diff, K&n FIPK, Ryno lined all the way over bed rail, heavy half suspension,factory skid plates,Fog lights, BFG 285/75/16 A/T's, dashmat, Stealth Radar. lots of special options some installed by me! 1980 Suzuki GS1100E Super fast 
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#6
09-16-2004, 03:24 PM
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Probably the U-joints....mine failed(seized) with no looseness/clunking sound at all. A squeak as you slowly pull away and vibration at high speed under power. Make sure you heat them up before pressing them out....... loosens the injected plastic retainers so they come out easy.
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#7
09-16-2004, 06:49 PM
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Re: Shaking over 70 mph
ditto
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2000 Silverado Victory Red, standard cab, short bed, short wheelbase, 4X4, 4.8L, 5 speed, 4:10 locking rear diff, K&n FIPK, Ryno lined all the way over bed rail, heavy half suspension,factory skid plates,Fog lights, BFG 285/75/16 A/T's, dashmat, Stealth Radar. lots of special options some installed by me! 1980 Suzuki GS1100E Super fast
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#8
09-16-2004, 10:33 PM
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Mine went out at a little over 50,000. What surprised me is they were Spicers! I thought those were supposed to be really good!
Anyways, I never heated mine, and they came out fine. You just hafta be careful with those aluminum driveshafts.
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1996 K2500 Reg Cab Long Box 5.7 Vortec, HD 5-speed manual (NV4500) LT265/75R16E Toyo Open Country M/T Hypertech Power Programming (AWESOME) K&N Air Filter, Flowmaster Exhaust Centerforce Dual Friction Clutch Pioneer Head Unit, MTX 200 Watt Amp, MTX 10" Thunder 4500 sub "To be old and wise you must first be young and stupid"  
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#9
09-17-2004, 03:05 AM
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i have the same problem with my ext cab short bed. it shakes over 70. but the hing is my truck is brand new, got it about 2 months ago with 18 miles on it and i now have approx. 5k. first week i got it, it happened on the freeway. is it possible the u joints are messed up even if its brand new. any other suggestions? thanks
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#10
09-17-2004, 06:24 PM
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onehate02-
I seriously doubt that you have U-joint problems already. My guess is one of your tires is out of balance, possibly threw a weight, or never got balanced! Take it back to your dealer and complain. 
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1996 K2500 Reg Cab Long Box 5.7 Vortec, HD 5-speed manual (NV4500) LT265/75R16E Toyo Open Country M/T Hypertech Power Programming (AWESOME) K&N Air Filter, Flowmaster Exhaust Centerforce Dual Friction Clutch Pioneer Head Unit, MTX 200 Watt Amp, MTX 10" Thunder 4500 sub "To be old and wise you must first be young and stupid"
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