I haven't had this problem (knock on wood) but I did at one time do some research. Back when Carriage was still in business they said this was a slide Mfg defect. Replacing only the gears will not solve the issue. The gear teeth are too short which over time leads to jumping gears and then stripped teeth. Secondly the mounts are not sufficient leading to mis-alignment and of course stripped teeth. You might prolong the teeth stripping by frequently checking alignment and all the motor mount & gear bolts are tight. Or better take them out and coat them with that red loc-tite stuff.
From what I read and concluded a true fix requires an engineering redesign.
I've heard some folks also had the motor upgraded which are NOT cheap. The Mfg is still in business.
http://www.rbwindustries.com/
Complete Repair kit #1245122
48 tooth gear only #1245472
Motor shaft gear (not included in repair kit) #1255062
If the gears are not perfectly aligned then need to insert shims.
I noticed the Lifestyle's have deeper teeth and bigger motor.
Now, I need to go out this weekend and check mine.
Here's a good link that may help.
http://rvecafe.com/warranty.html#0916