U-joint size???

[RyanBambach]

Hey all. I have a 2003 GMC Dually AAM 11.5 rear axle that I am putting into my 1989 GM dually. Anyway, I am wondering what the size of the rear U-Joint is? reason being is I am getting some custom shafts made for it and I have to tell the shop the size of the joint.

Thanks in advance...Ryan B

[More Power]

Your '89 dually probably has 1350 Spicer u-joints in the rear shaft, while the 2500HD/3500 run 1410's. :)

Jim