I don't think I have ever seen calipers cause a shake, but in a world where anything is possible.... Bad calipers usually cause uneven pad wear. Bad calipers can (and typically do) contribute to warped rotors because they cause them to over heat. Calipers are very inexpensive, but why change them if you don't need to?

I agree with Hey if the steering wheel isn't shaking and you feel it in the seat, look to the rear. It could be hard to tell if the drums are warped. You will have to take them to a shop to have them measured.

 

RWAL???? I changed the right wheel hub assembly and it didnt shake before or even after i changed it. Sometimes it the truck shakes and sometimes it does it very little. I am going to check the rear wheels and brakes even though about a year ago i had the whol rear brake system done over and it was fine.

 

RWAL= Rear Wheel Anti Lock brakes.

If a caliper is hanging up, it generates a fair bit of heat. That heat will eventually warp the rotor, and you get a vibration. Heat it up enough, and you get a vibration even when you are NOT stepping on the brakes. Of course, that type of thing would be felt more thru the steering, than the seat....

 

The brake pedal will pulsate also. I'd also check the ujoints on the rear shaft, if that has not already been suggested.

 

My brake does pulsate once in awhile and you can feel the truck shaking, almost like the brakes are skipping on the rotors, but the rotors are brand new and pads also and this happened before i put new rotors and pads on.

 

Just because they are new..... doesn't imply that they are perfectly flat. When I was doing the wrench thing for a living, even when installing new rotors, I would throw them on the lathe and shave a couple thousandths, just to MAKE SURE they were indeed flat. 99% of the time, it turned out to be a good idea. Saved me from having to do the job again in a couple days when the customer came back with a pedal pulsation.

 

I guess I'll go read the entire thread(I should have done that regardless). But have you determined whether or not you have 4wal brakes?

 

I dont have front wheel anit lock cause there is no cable for the frront wheel hub assembley, so I am going to look into the rear and see what I can come up with.

 

I am having the same problem and about to change pads for the third time. Bought some Duralast, but vibration got worse; vibrated badly, whole front end only when braking, even through the seats! So replaced with UP's from Napa. Noticed calipers were damaged from Duralast rivets; not sure if doing same with UP's (similar rivet location). Let me know if you get any solutions, looking for pads with rivets in center.

 

If you didn't do anything with your rotors.... you are not going to fix the vibration. It isn't the pads that cause it.