I get a gear grinding noise when I go over a bump. Wheel bearing seem fine. When I accellarate I can hear it starting at higher speeds. When I slow down it goes away. It used to go away when I would shift from 2wd to 4 wheel drive, but now that doesn't work, I have so many miles that maybe ware pads in transfer case could be worn, but not sure. Some times when I turn left and right noise would go away. Noise is intermittent, like something is moving around on its own.
I'm not sure exactly what the noise could be except that most likely it's in the drivetrain somewhere between the tranny, transfer case, or the rear-differential (AKA: rear-diff, rear-end or third member). None of which would be cheap to repair.
I'm pretty sure the intermittency you're experiencing is because whatever is causing the noise, is only worn & not fully gone yet, but will be soon. Unfortunately, I wouldn't know how to further pinpoint this noise, maybe someone else could???
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Doesn't always happen. I sometimes can accelorate and nothing happens. It does sound like it spins more then just the wheels turning speed. It seems to taper off and disconnect when I slow down. Can never get it to stay noisy when I am stopped. Noise did get better when shift rod nut was tightened where it connects to transmission under the vehicle. Please help.
Thougt it might be the front 4wd engagement gear, but the retracting spring was checked out and seems to be fine. Right front wheel is tilted slightly up, could it be the splines on the inside of the front right axel is rubbing on the inside of the housing? One of the front mounts where the body to the frame is mounted is shot and the body is lowered, but now thats fixed. That can affect the adjusted length of the parking or shift rod and where its attached to the transmission lever under the vehicle. The drivers side front axel is that permanently attached to the gears in the front differential?
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