All things good. I thought I'd start out with this because every thing seem good tie rods, rotors ,all joints every thing. I'm going to replace the shocks and rotate the tiers hope this helps. ANY ideas
thanks reg388

 

Don't step on the brake??? j/k Really sounds like maybe a warped rotor.

 

Yup, warped rotor. $12 fix.

 

Ditto on the rotors.

 

I'm with the others, turn your rotors.

 

before you swap the rotors. jack up the truck and check for play in the axel bearings. i have less than 4k on brand new rotors, and im getting a brake shimmy. every single component on my front end is brand new with the exception of the bearings. so that will be my starting point when i get time.

 

year and model of truck?

 

99 3/4 ton short box 5.9 diesel. the garage doesn't think its he rotors.

 

Well, lets see. Of all the possible issues, turning the rotors will cost you the least. Why would you want to start with replacing the expensive parts, just to narrow it down to the inexpensive things. The ONLY way to know is to take the disks off and mount them in a brake lathe, then measure the runout. Without doing that, your shop is making a guess.

 

Mine was doing the same exact thing, rotors where warped and unfortunately to thin to turn. New set of pads and two rotors and it's good as gold. I'd start there first just to rule that out if it isn't it.

 

Your rotors can actually be thick enough to turn, but if the runout is too much, they can end up too thin after turning. You have to have the high spots shaved off of each side. That's why I said you can only know for sure by mounting the rotor in a brake lathe. Measuring the thickness in one spot with a caliper will not be a accurate represetation of the condition.

Mine we're warped once, and like many other, too thin once turned, so I got new rotors. Dodge and other mfg.'s are becoming known for using disposable rotors. Thinner rotors drops the rolling weights and helps them to meet thier epa milage ratings, and other reasons I'm sure, like saving .0000000001 cents on overhead per rotor.

 

just entertaining the thought here, but just how fast can you warp a rotor?
as i mentioned above, i have 4k of all highway miles on brand new rotors. and i have seen the bearing play when the alignment shop had it in the air. i guess if mine are warped , its just multiplying the bad bearings effect.

 

Smokey, I used to sell rotors ( owned a parts store ) and some of the value line rotors I would take a skim cut before I would sell them, so yes, it is not that uncommon for a new ( or lightly used ) set of value line ( Raybestos red box or similar ) to be warped.

 

You can warp one just as quick as it takes to run through a puddle of water and get a splash on it. Or a very hard fast stop will do it, if it's done just right. Holding the pedal going down a long grade will do it.

 

well, i know i saw a ton of play in the bearing, so I may as well have the rotos checked when its off anyways. thats the biggest headache , getting the rotors out of the way.