Need Help: Drivetrain Whine, Slipping in tight turns

[circmand]

those threads sound similar to what you are describing. I hope this helps there are several suggestions

[4X4 UFO]

bentcipher,
I can't address all of your symptoms, but the whine on deceleration sounds a lot like the TOD does when all the tires are not the same circumference. I tried running rear tires that had about 3/32 less tread depth than the fronts, and it caused a loud driveline whine on deceleration. When I put an evenly worn set of tires on all the way around, the whine disappeared.

Randy

[bentcipher]

Thanks both for the reply... I checked the diesel sound search results... not it. I'll read it in more detail but so far the symptoms are different. The sound itself is an even whine that stays at about same pitch no matter what speed, acceleration, coasting, etc... also, this is not motor related. My gut tells me it's probably the differential but don't have enough experience to know for sure.

Oh, and it's definitely not the tires or traction related, same "whine" occurs whether I'm at 2 mph, 20mph, or 40mph... can't hear the rest due to wind noise.

As far as slipping/jumpiness in tight turns - I had this truck for about 3 years now and pretty familiar with its eccentricities and character traits, especially in tight turns, on/off pavement, good/bad tires. What I'm experiencing now is very dissimilar in a feel and sound.

Thank you both for the input.

[Solitude]

It is still an all wheel drive vehicle.... maybe your turn is a bit too tight for the speed

[bentcipher]

Well.. I think the culprit here is the front axle. For now, I'm ruling transmission and T/C out as I'm not able to establish a relationship between the symptoms and the transmission or gearing itself. The symptoms persist whether I'm in gear or coasting in neutral, forward or reverse, slow or fast, in 4lo or 2wd, etc..

I'm going to start with changing fluid both front and back and see where that takes me. Will post results as soon as I have them...

[tom4bren]

"Also, I’d like to know if this is related to the “towing” method truck driver used few weeks before the problem surfaced."

Entirely possible. I would definitely check with the company to see if they will have the VX evaluated at a garage of your choice (not theirs).

[MSHardeman]

I was actually thinking about the towing issue during my morning coffee (hey, it just popped in my head) and I wouldn't think that dragging ANY car across the asphalt would be good. It would put stress on all the gears along the drive line (transmission, transfer case, differentials) and could throw something out of whack.