After a bunch of searching I have not found the correct part numbers.
I'm trying to find the correct Spicer Life U joints for the rear driveshaft on my 07 Mega 6speed. 2 piece AAM driveshaft.
Call 8lug Truck Gear and have to measure for 2 different sizes. Then ordering next week, shipping to AK, etc puts me 2 weeks out.
Does anyone have the correct part numbers I can take to the local Axle outfit here that carries Spicer? They don't even show an application in the lifetime Spicer U joints.
Thanks.

 

Well apparently its a mystery!
I bought the spicer grease able joints that are meant for the front axle application. Will try to post up the #.
Reputable drivetrain place reccomended them and they are the same dimensions as the spicer 3206 joints. Same triple lip seals as well.
I won't be using them though since the truck puked yet another rebuilt hydro boost pump. Went and bought the expensive upgraded one at the dealer and while there said eff it and ordered an OE 1 piece alum driveshaft complete.
No u joint pounding for me this time around.

 

"U" joints are a common issue with these trucks especially the center one. Use the best greasble ones you can find and drop the center bearing mount with a spacer. There is an excessive angle there that works the hell out of the joint.

 

Yeah thats the one that locked up and the carrier bearing is shot too. Not too bad for 115k mi I suppose.
Never had any vibrations or shimmy out of it until just recently so I think the stock angle was ok.
Got a new aluminum 1 piece driveshaft waiting at home now though.