2nd Gen Non-Engine/Transmission Warped rotors?

[THess]

Our work truck is a 97 2500 4x4 5 speed. When the temperature gets below about 25* the truck shudders under braking like the rotors are warped. It stops when it gets warm outside. Any ideas?

 

[Johnny5]

Does the pedal get hard and do you have ABS? If so it sounds like the ABS could be activating. I had the ABS activating at low speed and it shook the truck like you mentioned and it turned out to be the front sensors were dirty and this happened w/o turning on the ABS lamp.

 

[THess]

The abs light is not on right now but it was a while ago for a day then it went out. Where are these sensors you're talking about?

 

[Johnny5]

for the front sensors, s/b right behind the rotor and under a small tab that is part of the dust shield,at least on my '01 2500, easy 1 bolt removal. I cleaned the sensors themselves and the tone wheel which takes a little patience since the access to the tone wheel is small and I went completely around the circumference. The rear sensor s/b in the rear dif on the top as it is on my '01 but I'm not sure on the '98.



I wish my ABS light would go out. It has this thing when it hits -20F it turns on and stays on forcing me to take it to the dealer to reset, altho one time it was a bad rear sensor. I like the idea of having 4-wheel ABS but it has been nothing but problems for me.

 

[Dave M]

My 97 does not have ABS in the front, only rear. I have read that the ABS senser is mounted on the rear diff. I have not had ABS problems yet.



Last year I was chasing "Death Wobble" on my 97 and after replacing lots of front end componets (about $2,000 worth) I thought I had it licked. Then everytime I barely touched the brake pedal (at around 50 MPH) the truck would skake vilently side to side. I replaced the rotors and the wobble has been gone for a year now. The rotors were warped and causing the shaking. I used drilled/slotted rotors from NAPA. Search my user name for details of the fix and pics.



Dave

 

[San Felipe Bob]

Ah ha!

Check the grease/ Lube in the front caliper slide bolts.

1 good rain storm will wash the lube out and cause the calipers to stick real bad.

That's why I invented a cool solution to keep most of the water out.

PM for details...

Also... .

I have metalic rear shoes and they actually get a coating of rust on them over night after driving in the rain...

I get a slight shudder when first applying the brakes the next day.





Cheers

SFB

 

[THess]

Thanks for all the replies. Today the truck drove fine; no problems, but the temperature was above 20* all day. I don't think its death wobble, I've felt that before in my 98. I'll try to get the wheels off over Christmas and see what I can figure out.