A noise I can't figure out yet

[rworks]

OK, 4x4 87 Shortbed with 4.0 and AW4. Engine is from a 01 Grand Cherokee (about 40k miles) and tranny is from a 94 XJ.

 

In drive and under power its making a wocka-wocka kind of noise, more pronounced when in a turn or on an uneven road. Does it and out of 4WD. And when I shift into Neutral while rolling and give it some gas, I get the same noise. No noise when I let up on the gas or am coasting.

 

I'm not good at diagnosing noises, but this one sounds rotational as opposed to an up/down noise.

 

I know I'm not giving a good amount of info on the noise. I've been under the truck and given everything I could find a good shake and put a wrench on everything and its all tight. I have a few ideas for what it might be, though.

 

Torqe converter?

Crankshaft bearings?

Motor mounts?

Transmission and/or motor loose?

Driveshaft out of balance/round?

 

Ideas?

[Geonovast]

Pop the front driveshaft out and see if you still get it. Also check the wheel U-joints.

[Oizarod115]

jack the front end and check wheel bearing play by wiggling the wheels up and down left and right. also check the rear axle too, sounds like it could be a rear- wheel bearing.

[1974CJ5]

And when I shift into Neutral while rolling and give it some gas, I get the same noise. No noise when I let up on the gas or am coasting.

 

 

This sentence makes me think it can't be drive shaft, or wheel bearings or anything not rpm dependent. I would probably start by seeing if maybe it has something to do with the power steering since you said it seems to intensify when turning. I am not much real help with your problem, just thought the previous posters missed that sentence. (cause I too was thinking wheel bearing until then)

[Geonovast]

To see if it's either the motor or something on the motor, make sure it's completely cold, pop the belt off, and start it up. Rev it up a few times, and see if you hear the noise.