Hi Guys, Hope someone can help me out. I need a conversion u joint for a transmission swap. I have a l99 F250 2wd with 4r100 and blown pump and clutches. I have a take out '03(trans tag says 03) 4r100 from a 7.3 E350. Both slip yokes are 31 spline and the tailshaft opening is the same. The u joint is different as is the slip yoke outside dimension (Diameter). Does anyone know of a 331 to 330 u joint? My other options are to swap tail sections or turn the f250 yoke down to the new diameter. Am I missing anything. Trans bolts up and sensors swap. Only the speedo is somewhat different.
Thanks in advance.
Shane

 

Now I'm wondering if the original was an HD4r100?

 

FYI... It was an HD 4r100. Needed a neapco #2-1435. It converts 1410 to 1350.