alright now i got a vibration

[bigd65]

Ok yall know about the drive shaft problem i had. well i turned it around like Mike said, just for piece of mind. well it didnt do anything, maybe it maybe it didnt. now what will cause a vigration on decceleration, when i let off the gas. it just started this. i went and replaced the U-JOINTS again (lifetime warranty at O'rieley's) and i just drove it around the block. it seemed different but not to sure, it was only 30 mph. would or could a DECELERATION VIBRATION be caused by the drivr shaft/U-JOINTS?.