The words in this discussion are very encouraging to us V10 Class C owners. I have only around 65K on ours, so hopefully it has many more miles left in it!
Not to rain on the parade, BUT ... our 5-speed TorqShift transmission mated to our V10 did go out at only around 61K miles on the MH. :(
Both our excellent commercial truck service garage mechanic and the transmission shop owner had no idea why our Ford 5R110 tranny failed that soon. The transmission fluid was a healthy pink color at the time of failure.
I had them replace it with a heavy duty remanufactured version of the 5R110 transmission (new ones are no longer available) and it responds noticeably better than the original 5R110 did. It's especially smoother when in it's TOW/HAUL mode - which I use a lot now - much more well behaved in it's up-shifts and down-shifts.
I would have thought that a 12,000 lb motorhome on a 14,050 lb. rated chassis could in no way tax the transmission enough to destroy it. It's a mystery as to what caused the failure. (I do go up long 6%-8% highway grades now at only 45 MPH instead of 58 MPH ... like I used to.)
