When I was a high school kid, dad taught me to disk with his Farmall 806 and wheel disk using 4th gear, low range with the TA in low (lever back). He said it felt like the right gear for the work. These days I have a Farmall 756 and a 14' bushhog cutter. 4th gear, low range with the TA back seems right for that job too. Am I causing any harm to my TA (premature wear) bush hogging on the low side of the TA, when mowing several acres?