Groaning noise in the rear wheels or brakes?

[Tarheelgeek]

I have an 1998 S14. I have recently taken the brakes apart and put them back on and everything seems to work fine. I also added after market tires and rims oversized compared to stock. When I shift in to reverse and start rolling back my rear wheels sounds like they are groaning, if I lightly hold my brakes while backing up the sound does away. Also if I tap the brakes a few times and let them go the sound also goes away until the next time I let it sit for a couple minutes and do it all over again. I have adjusted the e-brake with no success. I figure it could be a wheel bearing, but it doesn't make any sounds any other time. Going forward there is no sound.

Any thoughts would be appreciated!!

[r3v_v3ng3]

did you grease the brake parts when you put it back together?