AHHHHH this is making me very very frustrated lol I have a 93 W350 5spd 4wd and I put new rotors caliper and pads on front axle around this past June and it worked great and around a month ago I put a new master cylinder in it. Ran/worked great now about two weeks ago I started getting a "shimmy" or a hopping death wobble feel coming from what I feel would be the front end cause I looked on other posts and they were discussing it coming from the rear axle. But when I press the brake pedal in it shakes my steering wheel and hopping feeling coming from the "front"..... And it keeps getting worse and today my ABS and brake light came on ...

HELP lol

Any advice or what to look for in "fixing" this problem would be greatly appreciated thanks in advance !!!

 

Check the rotor run out those cheap made in china rotors are crap. Machine the rotors if excessive run out is found.

 

Loose wheel bearings will do the same thing as well and your runout would read high b/c of it.

 

My death wobble was caused by bad king pins, see here ...Mark

 

Old brake hoses collapse internally. Fluid doesnt return, warping rotors..


Oh yeah...chinese rotors warp

 

Chinese Junk used to look like this.

 

Now it looks like this:

 

^^^^^^
If you are going to buy a cheap aftermarket rotor get the ones that are made in Canada. I have not had any issue with rotors that come from Canada so far.