Quote: Two different worlds, drag racing and 4x4 trucks. Dead hooking a 1500hp car is a lot harder on parts then a 4x4 spining off road where traction is a minumin. If you think a dana 70 is only 15-30 more pounds then a chromoly housing, aluminum center section 9 inch your crazy.
Tell that to the jeep guys that have serious traction in the rocks, they slide a little back, wheel is under load and then catches...Many v8 powered jeeps have either broke something like a shaft or a housing or launched the vehicle over backwards. It aint muddin I am talkin about here... oh and the 70 with 40 spline axles are good up to 8000 ftlbs of momentary torque, the 60 is good for 6000 lbft of momentary torque with 35 spline. I don't see any 9 with factory parts rated to even close to those numbers the 8.8 with 31 splines is about 5100, the 9 is 5500 per one chart on the web. So you can decide what you want....just barely makin it or never going to break. I went with a 70, it was like 6 lbs heavier than an HD 60, I don't think I will ever break it under normal circumstances. Tim
1941 Taylorcraft 1968 Charger 1994 Wrangler 1998 Wrangler 2008 Kia Rio 2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
oh and the 70 with 40 spline axles are good up to 8000 ftlbs of momentary torque, the 60 is good for 6000 lbft of momentary torque with 35 spline. I don't see any 9 with factory parts rated to even close to those numbers the 8.8 with 31 splines is about 5100, the 9 is 5500 per one chart on the web. So you can decide what you want....just barely makin it or never going to break. I went with a 70, it was like 6 lbs heavier than an HD 60, I don't think I will ever break it under normal circumstances. Tim
