1994 1500 sierra vibration when shifting at high speeds

105

Asked by Jan 01, 2011 at 06:59 PM about the 1994 GMC Sierra 1500 C1500 SLE Extended Cab LB

Question type: Maintenance & Repair

when driving at constant speed over 40 the truck shakes when downshifting to maintain speed. carrier bearing was loose so i shimmed it to see if that was a fix. not as bad but still doing it. is this a possible driveshaft problem?

8 Answers

bad u joints.on drive shaft,or out of ballance tires,or warped rotors.bent wheel.

105

ive changed u joints and carrier bearing. all driveline vibration and rumble is gone. no tire vibration at any speed or when braking. still have the shudder when shifting in and out of overdrive. feels like it starts in motor and travels through truck. maybe a spun or damaged harmonic balancer? the truck was hit in front and repaired. i did not own it before wreck so i dont know if this was a problem before or as a result of the wreck. any thoughts?

ok now it sounds like the lock out in TQ is not working,if HB was damaged it would not run.how does it do in drive,no overdrive.

105

it does it in drive as well but only at high rpm- above 3000

sounds like the TC is going out.

105

thanks. i gues that will be the next step.

240

the center support is pressed on if you shimed it your stub is shot ujoint failer is also a thiong to look at textbook speeds are between 40 to 65 for vibration

10

I have a 1994 gmc pick-up. when in park the truck runs fine. but as soon as I put it in drive the hole truck shakes like really bad and gets worse when speeding up. what could that be?

1 of 1 people found this helpful.

Your Answer

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 64,546 nationwide Sierra 1500 listings starting at $999.

ZIP:

GMC Sierra 1500 Experts

  • #1
    dragonflyoffshore
    Reputation
    5,450
  • #2
    John Saffrahn
    Reputation
    3,780
  • #3
    Glenn Clingenpeel
    Reputation
    3,470
View All

Related Models For Sale

Used Ford F-150
3,293 Great Deals out of 220,936 listings starting at $1,200
Used Dodge Ram 1500
437 Great Deals out of 11,106 listings starting at $1,995
Used Toyota Tacoma
719 Great Deals out of 45,399 listings starting at $1,000
Used Chevrolet Tahoe
818 Great Deals out of 41,881 listings starting at $1,987
Used GMC Yukon
622 Great Deals out of 20,760 listings starting at $2,600
Used Chevrolet Camaro
460 Great Deals out of 31,468 listings starting at $1,450

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
26,005 listings starting at $24,403
2017 GMC Sierra 1500 For Sale
89 Great Deals out of 11,130 listings starting at $20,369
2016 GMC Sierra 1500 For Sale
177 Great Deals out of 4,081 listings starting at $16,404
2015 GMC Sierra 1500 For Sale
210 Great Deals out of 5,606 listings starting at $14,995
2014 GMC Sierra 1500 For Sale
214 Great Deals out of 4,925 listings starting at $9,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.