im in the process of swapping a 6.0/80e in my 01 long bed 4x4 silverado... i believe i have everything figured out except the rear u joint.. i have a 2500 rear driveshaft that i need to use because its shorter to make up for the longer tranny....anywho my problem is the rear u joint by the rear end. the 2500 driveshaft has a little bigger u joint than that 1500 rear end mounting thing... i was wondering if theres a way to make one u joint out of two to get what i need , or if i could get the piece that connects to the rear end so i could just use a 2500 u joint but i would imagine it has a more splines or is to big.. any advice

 

Your local parts store can get you a conversion joint. Just tell them what size the 2 joints are.

Not sure which rear was in the 2500 you pulled the parts from.

 

thanks thats good to hear ive always had built fwd drives and never have had to do custom rwd stuff so im no shure what can and cant be done.. someone told me i should be able to change the yoke on the rear end but i wonder if it wll be a different or bigger thread because the hd rear end is bigger..also would i mess with the mesh or the crush washer by loosing to put another yoke on then doing a re tq

 

I don't think a 2500HD yoke is the same spline but I am not sure.

If it came from a gas 2500HD its probably a 10.5 Full Floating rear end.

I wouldn't mess with it especially if you don't have the experience. Just get the correct U joint. They make several different ones with the right size caps for your swap.

If the parts store doesn't know call a drive shaft shop if you have a local one.