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1994 Chevy Truck

Tiny
JASONCLARKE
  • MEMBER
  • 1994 CHEVROLET TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
I'll get right to it. The engine runs perfect and the tranny shifts smooth in D or OD, burt while driving at around 80 KM if I give it a little extra gas it starts to shake pretty bad I have to let off the gas a little to stop the shake but then when I get cruising again and give a little gas it starts to shake again. Same when cruising at say 90 or 100 its ok but after a few minutes if I give it a little extra push it starts to shake. I have checked the U-joints and the drive shaft both are tight with no extra play. The RPM's dont bounce when it starts to shake kinda taking a miss out of the equation as the engine doesnt seem to be missing and the shake is constanjt once it starts until I let off the gas.
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Saturday, April 18th, 2009 AT 3:33 PM

7 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Keep trans in D then drive is shake gone?
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Saturday, April 18th, 2009 AT 4:12 PM
Tiny
JASONCLARKE
  • MEMBER
  • 9 POSTS
Nope tried in D and in OD
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Saturday, April 18th, 2009 AT 7:03 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Does it shake from a standing start? Does steering wheel shake? Or the seats shake? How are trans and engine mounts? Front suspension components tight?
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Sunday, April 19th, 2009 AT 12:32 PM
Tiny
JASONCLARKE
  • MEMBER
  • 9 POSTS
Doesnt shake from standing start or when putting engine under load in OD or D with brakes held to floor. Steering wheel does not shake, seat kinda gets into the shaking but tough to tell as it may be just thaT the shake is that bad that it is shaking the whole truck, tranny and engine mounts are AOK, All front suspension components are tight. I am leaning towards rear end but am thinking if something wasnt right in there wouldnt the shake be constant? It really only happens when I am driving at a speed above 60 KMPH, doesnt matter what speed and only starts shaking when I give er that little bit of extra gas regardless of speed over 60, same at 65, 70, 75, 80, 90, 100, as soon as I give that little bit extra push on the peddle it starts to shake.
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Sunday, April 19th, 2009 AT 6:17 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Try this jack up rear end put on stands run see if it shakes.
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Monday, April 20th, 2009 AT 10:57 AM
Tiny
JASONCLARKE
  • MEMBER
  • 9 POSTS
Put it on a hoist and ran it but no shake.
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Tuesday, April 21st, 2009 AT 2:55 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
I think it is a transmission problem possibly torque convertor.
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Tuesday, April 21st, 2009 AT 8:23 AM

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