I replaced all the u joints in my truck with Precision greasables I got from Napa I would stay away from factory non greasables that is why they go

 

I 2nd that! Now have 7 nips to grease plus the only 2 that came from the factory. AAM is not the problem. Interesting point I want to make is the front drive shaft, double joint at the transfer case came from the factory with SPICER stamped on the cross. Anyone else notice that. The second gens all had spicer non-grease that lasted way longer than these (90k miles). By the way I HATE LOCTITE. Seems everything I work on has this red or blue garbage on it. Late summer I'll add to my greasing with ball joints. Hey you got to respect that it is a very heavy truck with a sweet mod friendly motor. Price to pay for power and torque.