is the u joint to use the th400 or 4l80e yoke the 1330 t0 1350 conversion u joint ? need to know this then i will do a complete write up with all the things you need cause no one on this forum covers every thing you need .

 

Yea I am kind of curious myself too.

 

I built a new driveshaft and used a 1350 up front and a 3r to 1350 in back.

 

so which is the stock truck style ? and what is the th400 style this is the last thing i need to be driving again .

 

the driveshaft shop just put one in mine.. i believe it was the same as the other 2 on my 2 peice DS..

 

i would let them do that to mine to buti dont see paying 50 dollars to have them press the damn thing on when i can do it myself but no one seems to know what kind or part number u joint is on the 4l60 or 4l80.

 

I used a 447 joint from NAPA to mate a 1350 Strange yolk to the stock driveshaft. I just took some measurements with my caliper then went looking thru their bastard joint catalog.

 

I figured someone on this site would know the part number for the stock 4l60 drive shaft u joint and the 4l80 u joint.

 

3r???

 

yea i just found another post where jamesb was saying that the stock 1500 ujoints were 3r and the 2500 were 1350 thanks stoichiometric now if i can get napa to find out what these would be in there books some reason they can't cross reference spicer ujoints.