Yes, one of the Michigan 475's I owned was a Turbo Transmission 475CT. The TT wasn't up to the hot conditions in the West Australian Goldfields, it ran a lot hotter than the other 475's with the standard countershaft/powershift transmission. It was very reliable, though.
I don't think the 475CT was built for very long? Maybe 2 or 3 years? The transmission warranty was 30 mths or 10,000 hrs, so you really needed to be working double shifts, to get the full 10,000 hr warranty!
All the Michigan 475's I owned (B's and C's) were high hour machines when I purchased them, some had done 30,000 hrs or more, but the company that previously owned them (Dampier Salt), had never resiled from spending repair money on them - in fact, they were typical company machines - the workshop would rebuild a host of major components, then the beancounters would see the bill, and declare the loaders were costing them too much money, so they had to be traded in on new ones! They traded them on new 992C's.
As a result, I would often acquire a used Michigan 475 with new transmission and engine, for less than the cost of a transmission rebuild!
They always looked scrappy though, because of the salt. So I'd get them sandblasted and repainted, and they would come out looking great! One 475B I bought, worked for 3 solid years with hardly any bigger repair than the odd hydraulic hose.
They were only retired when the mining company head honchos declared they were too old and inefficient and unsafe - due to drum brakes. The mining engineers only wanted machines with wet brakes, so the old 475's were out of a job on major minesites by the mid 1990's. The 475CT lasted longer on minesites thanks to the disc brakes, and she's still going (occasionally) today. She can be seen alongside the highway at Southern Cross, W.A.
I left two of the 475B's sitting in the bush on a lease at Higginsville (W.A.), I have no idea if they are still there, I haven't been there for over 25 years. It wasn't even worth cutting them up for scrap, the value of the scrap would have outweighed the haulage cost.
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