u joint info needed

[994door]

i was looking around under my tahoe and grabbed the drive shaft and it will move side to side. I believe that when they rebuilt the rear they replaced the u joint with the wrong one it looks new with blue cup seal but the cups slide side to side i need the part number for a good replacement any ideas?

 

[wmgood64]

yeah Something is definately messed up!

 

[994door]

my guess is they replaced it with one from the wrong year or grabbed the wrong one off the shelf

 

[wmgood64]

Probably something like that wrong one the right box etc!