Sounds like the crank gear is broken. A new one costs about $10 and takes 30 minutes to install. I found out the hard way not to "keep cranking the antenna up until you hear clicking" as I was told when I bought it. Now, I labeled the handle to only turn it 14 times to raise.
2000 Cherokee 31BH, "flipped axles and raised",LEDs, solar, inverter, etc..aka "boondock ready". '07 Tundra 5.7L DC-LB, modded as well.
2000 Cherokee 29BH with 6V batteries, LED lights & 400 watts of solar power, flipped axles and raised. 2007 Tundra 5.7L DC-LB with lots of mods. C-co, 8/158th AVN Maint.