fishbones182

2012 truck. Truck pulls to the right. If I drive on a left crown the truck will track fairly straight with a slight drift to the right eventually. Same effect using two different sets of tires. I checked the rotors with a temp gun both rotors are close same temp. Left front rotor slightly warmer. So at this point I'm pretty well stumped on this one. Any ideas what it could be

Cody2006

I'd wonder if its something in the braking gripping or a warped rotor, if pulling to the right I would think its something to do with the right side. Rotor set straight, not warped, brake pads with enough compound to help the pads move smoothly in the slot, not shake/rattle. I had this issue with my ranger, found the brake was gripping more and came across the grease idea which seemed to of fixed the issue in mine. But not much else it can be if not alignment.

GMC to Ford

Ruled out tires and rotors. Alignment is the likely cause. When you say the alignment is good, are your referring to the its GREEN diagram that is printed off the Hunter machine. Green does not mean the alignment is good. It just means the alignment technician can get the numbers in the green zone (within factory specification). I would suggest taking it to another shop that checks alignments for free.

Worn suspension parts.
Uneven camber side-to-side. Pulls toward the side with the most positive camber.
Uneven caster side-to-side. Pulls toward the side that has the least negative caster.
Rear axle steer. Rear axle toe out of specifications or bent rear axle.

Any mods to the suspension front or rear?

fishbones182

No mods at all. Been to two independent shops one of which has done all my alignment work for years. And been to my local Ford dealer. All three to no prevail. Camber left front 0.0 right front 0.0, caster left front 3.4 right side 3.5, left front toe.04 right side .04. Left rear camber -.1 right rear -.3, left rear toe-.14 right rear .09

JMF150 5.0

Is it possible one of the rear brakes are pulling or maybe one of the rear tires (low psi) is causing drag?

I would also say alignment but it sounds like you have that covered.

acdii

Have you had it checked for dog tracking? I know Ford Vans are notorious for that. If the rear axle is off a bit, you could see a good alignment, but the thrust angle will be off enough to cause a pull.

GABAR

You say it`s pulling to the right or is it drifting/fading to the right.

Pulling to the right sounds like a braking problem/caliper hanging up.

Drifting/fading problem sounds like steering component/parts issues.

fishbones182

No I haven't I'll do that good idea I have not thought of.

fishbones182

If you let the steering wheel go it will turn to the right. Wouldn't really call that a drift. If driven on a left crown in the road it will track fairly straight with a drift to the right.

deapee

I get what you're saying - it's still a drift though, as explained. It's like a "tracking" issue - or a gentle movement to one side, where the steering wheel ultimately follows.

I think of a pull as a relatively forceful *thing* - ie - fighting the steering wheel to not turn on you.

Not that it really matters and is probably semantics in the end - but I think both are indicative of other issues (ie a pull is normally a seriously bent suspension component on one or both sides - caster being fairly hardcore off, camber differing greatly from side to side, or a tier with a defect so large that you'd see it immediately upon examination).

Whereas a drift more or less feels like the vehicle following a path - and the steering wheel absolutely will follow that path, eventually.

Someone mentioned dog tracking - typically that should be a measurement that is at least checked and provided when an alignment is done. The rear tire's toe angles are technically not adjustable during a four-wheel alignment, but the fronts are usually aligned to the rears right? Unless the person that did the alignment only threw sensors on the front wheels and the alignment machine took their word for it when they "centered the steering wheel." Check that printout and see if you got rear measurements.