I've just replaced the very early 6.5L TD in my motorhome with a new Peninsular AMG 6.5L TD rated @230HP. The torque curve is different from the original, and putzing with the throttle position sensor doesn't yield a sweet spot for shift points.

GVW is 18K lbs., although I usually run at 16K.

Any recommendations for/experiences with an aftermarket programmable Transmission Control Module for the 4L80E?