Is this normal?

[Otto]

You must make sure tire ware and pressure is even at all times. If tire ware and or pressure is uneven the TOD thinks your tires are sliping and starts to engage

[PeteVX]

i dont want to sound cynical but good luck getting it resolved!! I've had the same problem for over a year, its been into the dealership over 15 times under warranty, they've rebuilt the rear diff 3 times replaced the front and rear diffs, transfer case, front drive shafts and a hundred other things. The noise is still there, everyone agrees it shouldnt be but no one can fix it. Isuzu are flying out a manager and their best service tech next week to test drive it and try and figure it out.

I think the cost so far from my dealer is in excess of $12,000 and its worse than when they started!

I sincerely hope you have more luck than me but hey, i have a entirely new drive train at no cost!!

Pete

[Mikeys00vx]

Thanks to all the posts responding to my original question. This site is great.

After reading all the replies, I decided to check my tire pressure on the front. The tires didn't seem to need any air by looking, but, my front right tire was considerably lower than the front left tire. Apparently I have a VERY slow leak. Anyway, I put some air in my front right tire, and believe it or not the humming/whirring/groaning sound disappeared.

Thanks for the help guys!

Mikey

[psychos2]

if the gears in the diff are not set up properly you will get a whine. shawn