strange noise from transmission

[jdparadee]

i put on my 5" MBRP exhaust a couple weeks ago, and ever since then my tranny has been making a funny noise usually only at idle it sounds like something is like vibrating or something. is not the usual shudder that comes from the tranny. is it possible that i tweaked something? i did tilt the engine forward slighty when i replaced the exhaust but i can't imagine that it would do anything. i started jacking at the front of the tranny (towards the front of the truck) and jacked it about a half inch or so, but since it wasn't allowing downpipe clearance i moved the jack to the back of the tranny and jacked it up back there. any ideas on what this could be?

[ipz2222]

Something is touching the frame or body.

[ToMang07]

Check your heat shields... I know one of mine is rotted out and hitting the top of the pipe.

[jdparadee]

it only makes the noise at idle and any time i rev the engine and when i take off it stops, i will look for contact with the exhaust but when i put in on the only thing close to it was the shock.

[ipz2222]

Noise at idle is usually the torque converter.

[jdparadee]

its a manual transmission.

[dlorence]

Have same problem with 6 speed. Goes away with clutch in. Rattles with clutch out.

[campbellflage]

I had the same thing, It was one of my exhaust clamps hitting one of the heat shields and when I accelerated it stopped/couldnt hear it