Spline count at a major part too. I think the d30has a 27 spline count and the 44 is 32 (maybe) I'm sure it's here In he spec section. The more splines will give a stronger hold.
'99 WJ, 4.7L, completely bone stock, except for 245/65/16 tires
'76 Jeep Grand Waggy, 360cid Edle 660cfm/edle intake Quadratrac
'02 Exterra 3.3L, 5-spd, traded YJ for it :(
'89 YJ 2.5L, 5-spd, Borla header, dynomax super turbo muffler, Big-O XT 30x9.5r15
2004 Jeep Liberty Renagade 3.8L 2wd
'86 XJ 2.8L V6, 5-spd manual tranny (My 1st)