2000 Chevy Blazer need help

HOGTOWNREB

MEMBER
2000 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
100,000 MILES

The electronic shift button works on all 2h.4h. Auto, 4lo. When I put it in 4 hi it works, when I put it in 2 hi it works. If I had it in 4 hi on hard surface would the tires roar?Is that normal? The truck roars in all settings, auto, 2 hi, 4hi. So what you are telling me that the only thing that causes tire roar is a bad wheel bearing, tires are bad, or 4 wheel drive not fully disengage. So tire rods, idler arm, pitman arm, and ball joints will not cause roaring right or wrong?What is the best way to check 4 wheel not disengageing, and how can I be sure it is a wheel bearing?I want to find out were to begin? Thanks

1 Reply

TOOOMANYTOYS

MECHANIC
513 POSTS

Yes having the vehicle in four wheel drive while on hard surfaces will cause a roar, and is not good on the front differential. To check and see if four wheel drive is disengaging you could put it on a lift or jack all wheels up to see if they all turn. While in two wheel drive it should not roar. Unevenly worn tires, hubs, front differential can cause a roar. Ball joints tie rods idler, and pitman arms will not cause a roar while driving. However they can cause tires to wear uneven. Which would create a tire roar.