I always backed in and watched the pull / release lever. It'd go out and pop back in as the pin went in and latched. That said though, I have high hitched it a few times where it appears to latch, yet is indeed not latched. Hense, either painting the jaws and bottom of the pin, or at least visually checking to make sure all is locked in like it should be. Glad you got your parts in. At least I know now I don't want to damage the old man step on the tailgate due to cost.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)