currently im havin an issue with my 12 valve 96 4x4, the problem is at slow speed around 5-15 mph speeding up and from 25-0 slowing down ther is a noticable vibration in the front. im also getting feedback in the brake pedel when i apply the brakes, problem is i dont think its just the brakes because i still get the vibrations when im moving slowly from 5-15 mph on small incline declines and flat ground it feels like i have a trailer load that is bouncing back and forth and its shoving my truck back and forth.

 

It may all be in your brakes , warped rotor , rusted rotor .
Fix what you know is wrong , then look for more problems .

 

Could be a bad track bar as well

 

Things I replaced at 90,000 miles:
track bar
hub bearings
ball joints
all tie rods

just recently added a new steering box and a dss

not saying yours is bad but, you might check them out.

 

i had a problem that sounded the EXACT same as what you are describing. on mine it was some play in brake callipers. It usually only happened when i first started driving in the morning, what it ended up being was the callipers were vibrating back and fourth very fast as there was some play in there, it would catch on the rotor then fall back down and catch again. I was worried because it sounded HORRIBLE, I though it was a U joint or drive shaft or something going out. I ended up just replacing the rubber bushings on the front brake callipers, and tightening it all back up and its all good. I hope that's your issue seeing as how the bushing ended up costing me 5 bucks for both sides if i remember right

 

thanks guys it turns out that the brake system was about to completley give out and the track bar was bad and the u joints were the originals and rusted beyond belief (pain in the butt gettin those replaced). also someone cut my fuel line the rubber flex line that runs along the bell of the tranny up to the filter. dont know how. must be someone does not like me. however im still gettin a jerking motion in the vehicle in slow speeds im narrowing it down to the transmision because it has slipped before. what do you think