My rig is less than 4 years old and I have used them . Usually the gearbox will strip a gear or some bolt will strip and then the mechanism that prevents the slide from moving will be inoperative.
Older units from some manufacturers would come with them but as they perfected the mechanics, they did not provide them anymore.
I need 3 different lengths on my rig, so I made them with unions that allow me to only carry 2 sections. One for each slideout end. I can make them any length I need, supposing that I will never have more than one slide problem at a time.
2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
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