I ran hyguard in a ford c4 trans with big stall and a turbo v8. My trans cooler was a grad cooler that is a frame rail mount style from moroso. Never cooked the trans street driving it. But putting massive load against it foot braking for way to damn long did. It wasnt the fluids fault but a idiot drivers fault. Fluid still wasnt cooked like type f would be. I swear by hyguard since then.