Originally posted on Other Drivetrain but I'm wondering about the engine. Lately I been hear a grinding type of sound from the front of the truck when accellerating either from a dead stop or from slow speed. I hear it from 0-1800 rpm but is mostly from 1000-1800 rpm. Today it was more noticeable when I accelerated uphill after turning onto a street (same rpm ranges). I would say there is a slight vibration associated with it. I'm getting close to taking the truck in some other things (oil change, spark plugs, & the torsion bars need adjusting) so I will have it checked but I could really use some opinions on what this might be. (engine, transmission, etc.). Thanks in advance.

 

I'VE GOT THE EXACT SAME PROBLEM, IF YOU FIND OUT WHAT IT IS, PLEASE TELL ME!! THANKS

 

triton_4.6_power
I'm taking the truck in next Thursday to have it looked at. I think its got to be in the drivetrain instead of the engine. I tried revving the engine in park and didn't hear or feel anything. A gentleman I work with thought it might be a bad u-joint. It has been more noticeable lately.

 

I know some of you might be sick of me saying this all the time, but it could be loose accessory bolts. I had a buzzing(grinding) noise and vibration when I would accelerate and it turned out to be the a/c compressor mounting bolts. Two were loose and when under load, it would slap around a bit. It actually sounded like the fan hitting the shroud. Once I tightened them myself, no more noise. Have you ever had your timing cover gasket replaced under warranty? Mine started a month or two after I had that done. My guess is they weren't tightened all the way and eventually worked themselves out. Good luck,,,98

Check the p/s mounts too!

 

triton_4.6_power
I took the truck to the dealer Wednesday pm. It didn't make the sound on the way there; didn't make it for the mechanic either. He checked everything in the front end and couldn't find any problem. When I drove it home Thursday, it still didn't make the sound then or when I drove it Friday. I'll just have to wait and see if it happens again or not. I had not driven the truck between the previous Friday and Wednesday pm.