1998 Other Chevrolet Models Truck Shakes When I Brake

THEOPHYLAKTOS

MEMBER
1998 CHEVROLET
V8
4WD
AUTOMATIC
69,000 MILES

My K1500 shaked when I brake at 45 to 40 mph. It goes away when it hits 39. Ive checked to make sure the tires are not cupping/scalloped or wearing unevenly. I rotated them checked the pressure, balanced them, checked the bearings and everything checks out fine. The only thing I can come up with is maybe the front rotors are warped but it only does it at that speed and the truck doesn't dip forward when I brake. Or maybe the drum brakes are out of round. Thats all I can think of, hopefully someone can help me with this problem.

1 Reply

HMAC300

MECHANIC
48,601 POSTS

Usually when shaking/vibration happens it is brakes but not always. If a rotor is out of round it gives a pulsation meaning it will feel like your pedall is going up and down when you brake. That usually entails a brake job, turning or replacing rotors and replaceing pads. But this could be a frozen caliper or you have a front end problem which I think you do. Have a pro check out the front endfor a bad ball joint/idler arm, etc. It could be an axle shaft as well but I don't think so.