The 8 1/4 thread

Yeah I don't know either. I just know my headache is getting worse, not better! I ordered a late model 29 spline Sure grip unit off E-bay to put in the 97 Dakota. Someone had welded the spiders in the open unit that was in there.
Ouch! I did learn a funny thing about jeep when they say 4wd that is mot true 4wd it means all 4 wheels turn 1 in front and 1 in back forward the others in revers,. Have to look for the tag to be sure before pulling the cover, usually on the ground in muck.