Weird Noises from the front differential ( m998 Humvee)

[Hamad]

Hi everyone,I have a 1987 m998 Humvee. It drives great, but I noticed a weird sounds from the front differential when the truck is just starting to move forward with the transmission in drive (D) and the steering wheel to the left or in reverse (R) with the steering wheel to the right. Mainly whenever I start driving the car like driving out from a parking or a garage. After that the it drives normally. Does anyone had the same problem?

 

[Mogman]

WELCOME TO THE FORUM!!

 

[TOBASH]

Make sure the transfer case is in H and NOT HL

 

[Hamad]

Make sure the transfer case is in H and NOT HL

It's in H .. I tried to test it in HL .. I felt the deferential is locked and about to break

 

[HUNvee]

Are you sure the noise isn't coming from the halfshaft?

 

[Hamad]

Are you sure the noise isn't coming from the halfshaft?

I think so .. I checked it multiple times with a friend

 

[Mogman]

All you can do is inspect everything, look for loose bolts on the caliper brackets, half shafts etc, push/pull on everything, look at the brake pads and lines.
If you have not done so already change all the gear oil in the diffs and hubs, inspecting the magnetic drain plugs.
Look for leaks or evidence of grease coming out of the half shaft boots, carefully inspect the boots

 

[TOBASH]

Open the units and look for problems

 

[Mogman]

It also would not be a bad idea to jack up all 4 corners, one at a time using the jacking point on the lower control arms, that way the weight of the vehicle is still riding on the suspension, just enough to clear the tire from the ground, then push,pull each tire up and down and sideways looking for any play, report any found.

 

[Hamad]

All you can do is inspect everything, look for loose bolts on the caliper brackets, half shafts etc, push/pull on everything, look at the brake pads and lines.
If you have not done so already change all the gear oil in the diffs and hubs, inspecting the magnetic drain plugs.
Look for leaks or evidence of grease coming out of the half shaft boots, carefully inspect the boots

I checked everything .. I'm gonna change the oil in the diffs and hubs

 

[Hamad]

Open the units and look for problems

I will .. thanks

 

[osteo16]

Maybe a bad halfshaft, CV could be binding.

 

[Guyfang]

Hamad, please change your location to the state you live in.