Buddies run all rockwells on their trucks their sittin on bout 6 foot of tractor tire w/ big blocks turnin them i like the strength of RW but one axle weighs round 900# then add tire weight and RW's will let you know ur next weak link real quick... They twisted and snapped drive shafts went to all square tubed drive shafts fixed that then started eatin t-cases which gets pricy, so they divorced w/ military cases now they started breakin the 4 link that holds the whole system in the air( a 1"-5/8 bolt rated for 90.000 lb shear/260,000 tinsil...) i got a geared D44 that ate axles quicker than i can change my mind, went all chromoly and aint had a prob since. I aint got the tire they got but i can go air born never lettin off the gas an not break an axle. unless you dont mind down time for shipping parts and got a deep pocket shoot for rockwell otherwise i dont recomend them (but thats one opinion to the next) Not to forget when ur stuck aint no average lifted truck pullin you out, buy a track-ho with the axles