My 2 cents is I never gave too much consideration for mfg torque ratings. It all comes down to the operator. If you are easy on stuff you can put double the rated torque, if you can break and anvil with a rubber mallet, running half the rated torque it will still break! I put 1400+ ft lbs through a 1100 ft lb trans doing heavy work 20 years ago and am still using that trans today. All my Big Cam Cummins run 14" organic clutches rated for 1100 Ft/lbs at over 1400 without a failure.
I'm not sure how he managed it, but one driver where I worked would break the shift handle off roadranger! He said " Pete doesn't make good shifters, this the 3rd one I broke!" It is a solid rod that tapers to 1/2" thread for the shift handle and he would break it below the threaded portion.
Lack of lube will kill anything faster than too much torque, but shock load can cause an immediate failure. If you can keep from wheel hop or wheel spin on ice that then hits dry pavement, it should be fine.