Occasionally, when I'm stopped at a red light, or backing out of a driveway, I'll hear this creaking sound that continues until I start accelerating, once I do it immediately goes away...what could this be? (I just got my tranny rebuilt...new brakes...)

Little update: It's getting worse, and I turned into a parking space and it increased in volume big time. It sounds like a creaking/grinding/rumbling sound, and it sounds like it's coming from the rear of the vehicle.

 

ok so, another update, I had a friend put the car in reverse in the drive way and just hold the brake, and the rumbling started, and it sounds like its coming from the rear drive axle on both sides...

I checked my Chilton repair manual and it had a chart of symptoms for the driveshaft/rear axle and i'm experiencing all these:

1) Loud clunk in driveshaft when shifting gears (Worn u-joints)
2) Roughness or vibration at any speed (Out of balance, bent, or dented driveshaft/worn u-joints/u joint clamp bolts loose)
3) Knock or clicking noise (U-joint or driveshaft hitting frame tunnel/worn CV joint)

These sound about right?