alright: I have a np208 and i had a bad vibration before I swapped in a 1350CV by Highangledriveline. Within the last couple of mmonths I have heard the t-case hit the floor under acceleration (when the truck shifts into second gear). Withing the last couple of weeks I also noticed a severe vibration/whine under deceleration. I chocked the tires and put the truck into drive and noticed that the driveshaft has some play by the slipyoke of the NP208. I have an extra 208 (so I am not swapping in a 205 and 203) Does anyone have any ideas? THe shaft was bought around Sept-Oct of this school year. Warranty? Is it the case? Worn splines? F-d up bearing?