I can't give you any similar experience, but it almost sounds like something is keeping the slide from moving, so the motor tears itself off. Are you lubricating appropriately? Is something interfering with free motion of the slide?
Someone on the forum had 25RS and the slide actually fell out!
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10