Thanks meat_man. I've also heard from Motive themselves that some chrysler rear ends will whine regardless of what you do. I have my backlash set to 0.006 right now, I'll check it out when I open it up and see where it's at and may just tweak it out to 0.008 and let her ride. I'm not babying it as much as I used to and man, this thing will get up and go!

 

Oh and yeah, when I pull the trailer, it's much quieter. Makes sense. Doesn't peep barely at all under load.

 

Keep beating a dead horse here ...



(I thank ya ... anyway)

Well, it's been a couple of weeks and realized today that the noise I'm hearing under cruise widened its range from 45 - 50 MPH to 45 - 55 MPH. The noise is also noticeable under deceleration, but not nearly as much as it is under cruise (or maintaining speed). Noise during accel (or load) is nonexistent.

Been reading around and most ideas are pointing towards pinion preload. Although I had set it to 22 in./lbs. (new bearings), they have loosened to below spec with all of the driving. I'll be checking that.

Because during accel, the pinion is forced away from the ring gear, increases backlash - during decel, the pinion is forced towards the right gear, decreasing backlash - this may explain something.

My theory (and please let me know if I'm on the wrong track anybody), is that the preload is a little too low and needs tightened, with that said, backlash should be increased a tad (perhaps to 0.008). Why? If the preload is loose and the backlash increases during accel, I should compensate for the pinion not moving (once I tighten it up), and increase backlash manually - as it makes no noise during accel.

My only hope now is that the pinion preload is indeed loose. If it's dead on, I don't know what I can do, but most sources have mentioned that no noise during one of the two load types, is usually the pinion moving back and forth. We shall see. Maybe the races sat a little deeper and loosened the preload ... can be a few things. Thanks for listening!

 

by the way, I don't have any temp issues and no other noises so I'm catching these little things while I'm early in the gears. Have to be knit picky with these things for sure. The truck rides fantastic otherwise.

 

Just FYI, I've continued this tread in the tech section:

https://dodgeforum.com/forum/3rd-gen...-the-03-a.html

It's not over until the fat lady sings .. or it grenades .. brings a whole new meaning to the phrase, {insert destination here} or bust ...