The model 6041 means 600ftlb of torque, and 4 speed, and I think the one means auxiliary transmission.
So a 5831 is 580ftlb and 3 speed, a 7041 is 700ftlb and 4 speed, a 1241 is 1,200ftlb and 4 speed.
What I don't know for sure is if the torque rating is engine torque, or engine torque multiplied by first gear ratio in main transmission. If it were the later I think even a 235 with a 7 to one first gear is to much engine for that transmission, and I know they were put behind larger engines than that. So it sounds likely that the torque rating is for engine torque.
I imagine it will hold up fine in your application if you are careful, but a 7041 is probably better suited to your job.
I would install a temp gage and keep an eye on it, you are more likely to kill with high temps while pulling a load than with a sudden catastrophic failure, or if it is catastrophic the high temp will give you a warning.
Grigg
