Discussion in '3rd Gen - 2007 - 2017' started by fvernet, May 6, 2021.
WHY 86 ?
I had a brake job done all around yesterday - new rotors and pads on all 4 corners. Turns out the front left rotor was warped - that MAY have been the source of the noise. I'll listen for it and report back.
Could check fluid level and change fluid to start with.
From rebuild the diff to brakes.....St(d)ealers suck.
I think its still possible the caliper is dragging, that ruined the pad/rotor system so new parts is a bandaid (temp "fix") masking the root cause. Onion skin as the diagnosticians say. Time will tell. An infrared thermometer would uncover that. Cheap tool, many uses, lasts a long time ... great for brake diagnosis. Pistons in calipers not metal these days, get skeewacky & bind. Pay me now or pay me later. Could be wrong. Food for thought.
Also good for measuring smoker temp and setting bath water etc. Lol
So...the rubbing sound is still there, most noticeable at highway speed. I'll have my mechanic look at the brake caliper as the possible culprit. Thanks for the tip.
Lots of good advice here. Look at EVERYTHING else before you open up that differential. Just about anything is more likely to be the problem.
I agree - it may be as simple as changing the diff fluid. I'm NOT convinced the diff is bad...heck...I drive in 2H 99.99% of the time. 4H has been turned on a few times in heavy snow for a few minutes. Period. So it cannot be worn out.
Could also be a wheel bearing - I am told this is not uncommon on these trucks with close to 200k miles.
Also have a look at the vacuum check valve those have been known to have a problem with certain model years. Causes the front locking hubs to either partially or fully engage even when in 2H
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