Okay so I've had this problem for a while now driving down the road its a knocking noise sounds like the driveshaft turning and something connected like the slip yoke is making the noise can't hear it at high speeds but low speeds and when slowing down or letting off the gas does anyone else have this problem or know what it is ?

 

Could be a number of things, does it sound like a mechanical clunk, or like something is loose such as your sway bar?

I had a slight clunking when I put it in 4x4, crawled under the truck and the head shield came loose and was resting on the front drive shaft.

 

It sounds like something mechanical like a knocking noise nothing is loose under the truck

 

Transmission Mount?

 

I'll try to record it tomorrow so that yall can hear the sound I doubt that it's something with the trans just had it rebuilt maybe like 6or 7 month ago

 

It's like a constant knock rapidly no just once here and there

 

Does it fluctuate with your RPM's? Check your oil.

 

Checked oil and no it doesn't it sounds like it's coming from the reared

 

While sitting is park, can you spin your drive shaft a little bit? Your gears or U joints may be bad.

 

I got under there and tried to move it and not budging do you think It could be the slip yoke ?