1999 4 Door, Vin W 4.3, 4L60E/NP8-NV236 Transfercase.
Right after startup any gear is fine, but after driving it a bit and then stopping and going into reverse from any gear, it shudders horribly, only after its moving in another gear. Tranny has 76,000 miles on it and has had fluid added recently, no visual leaks (anymore) though i do need to check the transfer case input seal. anyone know about what specifically would be shuddering hard enough to shake the truck? it almost seems like its not dropping pressure and its forcing itself into reverse.