I respectfully disagree.
I've ran a box4rocks 231 doubler in front of my d300 for years (11 years). Heavy steel beadlocks 40" tsls. Manual trans. 5.38 gears... Basically all the things that ruin a tcase - I've even sheared a 35 spline 4340 FF rear axle shaft and didn't hurt the tcase.
The...