Yeah that much slapping around and you will see shiny spots on the slip yoke when maxing the flex. Your on track for a repair just take a good look at everything else.
Sent from underneath my Jeep
89YJ 2.5L TBI, AX-5, NP231 SYE, Ford 8.8, Yukon Grizzly, Tom Woods Shaft, 33" BFG T/As, 4" lift, Warn VR10000s.
AF Jeep Club Tail #184