You are right about the OD in the first box reducing the torque to the second. The problem is Spicer designed the auxiliary to handle the engine torque X front trans first gear ratio, worst case scenario.
A 1241 is rated for 1,200 lbft of engine torque, I can't find what the ultimate torque is, or what the front transmission low gear ratio they had in mind is.
For some of the 8000 series Spicer auxiliaries I do have the recommended ultimate torque, I'll keep looking for the 1241 rating.
Another Roadranger idea:
RTOO/RTOOF-14613 not available new, but has three overdrive gears and is good for 1,400 lbft. 11th gear is 0.85, then 12th is 0.73, and 13th is 0.62.
Grigg
