I just finished major renovations on complete undercarriage of my 1994 Funlite FLL. I had to remove guide rod, easier than you think. TOP MUST BE DOWN, RAM IN RETRACTED POSITION. On the driver side of rod, closest to ram, at the very end is a cotter key maybe 1/8" diameter. It's pretty stout. Might be hard to see if lots of grease debris hydraulic fluld (Dexron III) and dirt etc is coating rod. The ends may have rusted or broken off flush with the sides of the rod, too, so you wouldn't even catch it with your eye in that case. Remove the key (small punch and hammer, pliers, etc) and the rod then slides out and slightly downward on the passenger side under frame rail near axle(s). Installation is reverse of removal :-)
1994 Funlite 21FLL
6" frame lift, 4 custom shock absorbers, Equ-A-Flex equalizers, Mor-Ryde greasable shackles & pins, 45 amp upgraded inverter/ 4 stage smart battery charger, 2 external refrigerator coil cooling fans, 6 gal water heater remote ignite, all interior exterior LED lights, 15" tires, 3 custom lateral axle & frame reinforcement beams, custom LP oven & stove, custom external LP ports, custom external solar port & controller.