Chuck K posted:I called Ron / AM today and ordered a pair of the slow speed worm gears. He said these will have a top speed of approx. 55mph. I have a leftover Mini 2 and an F40PH that I picked up for a steal recently. So I am going to try installing the Mini 2 with these gears and see how it performs on my grades. Thanks for the idea Ray and for the info Logcruiser.
I finally got round to trying this out. Completed the install of the Mini Commander II and the slow speed worm gears. I had lots of grinding sound coming from the worm gear. I ran out of time, but when I get back to it, I'll see what I can do. Perhaps these worm gears do no not universally fit al AM diesels from all eras. This FP40 has a 1996 date written on the chassis.