Got a 2001 blazer 2wd I just started to notice that if I accelerate preety fast from a stop or maybe just a 5mph roll I hear a grinding sound from what is sounds like the front end.. then it stops once I get up to 10 or 15 mph. But if I ease into the throttal or take off normal I don't hear it.. only under hard acceleration Do u hear it. I don't feel it in the steering wheel or in my foot. Any ideas?? Thanks

 

Since im not there to hear it, my vote would be a broken motor mount. Causing the motor to lift up and the fan hitting the shroud.

 

But wouldn't that happen when in park and me revving motor up? It only does it in drive? I'll double check your theory tho

 

in park, there is no torque involved..

 

how would I check that then?

 

need two people,, one to put it in drive and do a "power break", hold brake and accelerate the gas pedal while the second person stands to the side(driver's side) of the vehicle watching the motor raise up and listen for the sound. DO NOT STAND IN FRONT OF VEHICLE WHILE THIS IS BEING DONE!

 

Alright thanks I'll check that and give you a update

 

I haven't got the chance to get another person I did hold the brake and give it has and once it gets somewhat high In the rpms it makes the noise.. hard to tell where it's coming from undid check the shroud to see if there was marks on it and I don't think there is

 

Ok so I was up under my truck looking at all the mounts and I noticed my transmission mount was bad.. I could move the transmission with my hand. Guessing that's not normal. Could that somehow be making some kind of noise up under there?? I have preety much pinpointed the sound to be coming from under the truck but it's hard to tell from where

 

Just popped my hood and put my truck in gear and watched my motor when I reved it up the hole motor moved a lot!! So looks like that's my problem..as soon as my motor moves it starts making that noise