Weird noises

[dozerfrelich]

Hello I have a 99 limited that is making a weird grinding /humming noise only when the motor is on and tranny is turning . I don't have the noise when I'm coasting or at certain rpms. I really need help because I can not find the problem.

 

[Troybylt]

Hello I have a 99 limited that is making a weird grinding /humming noise only when the motor is on and tranny is turning . I don't have the noise when I'm coasting or at certain rpms. I really need help because I can not find the problem.

Can you put it in drive hold the brake with your left foot and easy onto the gas with your right and make it make the noise?

Can you upload a sound bite or a video with sound of the noise?

Where about does it sound like it's coming from, engine, front, underneath you, rear?

Does it change pitch or frequency as you accelerate?

Will it make the noise in neutral if you rev up?

Have you checked your Auto Tranny Fluid Level?

Are you using the proper Fluid?

When's the last time it had a service?