Hello-
Just found this forum, and have been reading for a few days. A wealth of info here!

I recently purchased a 2000 150 w/77k on it. When braking, I notice a slight to moderate hopping/shaking, almost like a vertical bumping. It's not the rotors, and I don't feel it in the steering wheel. It's only when braking at speeds above 30-40 mph. It doesn't happen on power-off. The suspension is slightly touchy (very bouncy), and this seems to make it worse.

Any ideas out there?

Regards,
Ellsworth

 

bump

 

Mine does this too... I'd like to see what it is also.

 

Could be time for shocks.

 

A freind of mine reccommended me to have my rotors turned.....i hope when i break..

 

Wheel bearings? Ball joints? Could be tie-rods also.

 

Ok, back to this subject. I just replaced my back rotors and pads and I'm still getting the hop at 20 mph. I started wondering if anybody that had this problem had an aftermarket rear springs? I noticed mine does and it looks like they added lowering shackles to keep the rear level. Plus they had added a goose neck hookup connected to the frame. Would the bouncing I'm getting just normal since there isn't any weight on the goose neck hookup or the suspension? Forgot to add my truck is a short bed F150 5.4L Auto.

 

I've had this issue too on my wife's 97 F-150 2wd long bed pickup with 89,000 miles and drums on the rear. It would be a bouncy type of shaking whenever the brakes were applied just like the drums were out of round, most pronounced as it decelerates through 40-20 or so MPH. So I had the drums turned, I reinstalled them, same problem. My brother and I discussed the problem at length and brainstormed over it, then I decided I needed to do some other things anyway so I replaced the shocks all the way around, had the rotors resurfaced on the front and replaced the front wheel bearings, and it seemed like we had cured the problem. About 3,000 miles later now, it seems like we are having just a little bit of same type of shaking. Not that it matters but this truck also has a TommyLift installed on it.

I'd be interested in hearing what others think about this, too.

 

Figured mine out! It was the front rotors! You just don't think it's the front, because of where you feel the shaking. I would of thought the shaking would've been in the steering wheel not the seat of the truck.
I have also heard that resurfacing the rotors works for a little while but, they start to warp again. It's just better to get new.

 

And see, that's consistent with the post I made just above yours. I guess I'll put some good quality rotors on the front of the old truck and see if that cures it.

Drilled/slotted for an old '97 work truck, anyone? Maybe I should paint the calipers, too.

 

Knock yourself out!!

 

Strangely enough, it must have been some kind of omen that I said this. I just bought a 2001 SuperCab for my daughter with this same problem! So rather than getting the rotors resurfaced, I decided to just put that money into a pair of R1Concepts drilled and slotted rotors. So we'll see if replacing the rotors alone fixes this problem.

 

It could possibly be a problem with the ABS...

 

when my front driver rotor was shot, my whole front shook like a mother. i didn't think it was the rotor b/c I just did the pads, and it looked fine. it turned out the back side was worn completely, while the front looked fine. check the thickness on both sides of the rotors.

 

nope, not the ABS. my did the same thing. turned out, it was the pads and rotor. just put new pads on and have the rotors truned or buy new ones.