A/C Compressor rattles in reverse

[Raddman]

Hi...I have an 03 Corolla and lately when my car is cold and I'm in reverse backing out I have a loud rattling....This only happens when the A/C is on...I had a friend check it out as I had it in reverse with the break on and he said it was coming from my AC compressor when I shut my AC off under the load it stopped...It only does this when the car is cold and just a little bit in forward gear at start up then it smooths out when warm...Any experience this or have any ideas?...Thanks

[Flashmn]

Well your engine rotates the same direction regardless of which gear you're in.

[jamesmetairie]

i have similiar stuff happening. i put the car up on ramps and could not find any thing loose such as heat shields ,cat converter,etc. i had someone start the car,then put it in drive and the rattling started.i put my head under the hood on the passenger side and i could hear the noise around the a/c or "tensioner".i,ll update you if i find a cure.

[Raddman]

Thanks...I haven't found out what it is ether, funny thing is that it goes away once the car heats up...