Trans brake can be hard on stuff. That was the end of our 8.75 in both cars due to axles twisting. Rather than upgrade axles and spools we stepped up to Dana’s. Converters were also upgraded to prevent ballooning. Overlooked this on the Mirada and it wiped out the thrust surface on the crank. Both of our cars were ladder bar so that was a go... might be trickier on leafs. I feel the tbrake is more consistent.