99 k15 sounds like front brakes grinding on deceleration. Completely replaced brakes, hubs, halfshafts,shocks. Checked front diff,tcase,trans fluids. Took front drive shaft out this evening, still grinding. Only happens after I get the drive train hot. Only over 35 , and only on deceleration. I'll throttle it hard enough for it to shift,then when I release the pedal, the mystery grind for a couple seconds. Truck has same torque and power it's had since I bought it,shifts flawlessly and the engine couldn't be much smoother with190,000 and no maintenance records. I am no Mechanic and am getting out of my comfort zone with this truck on my mechanical abilities. Had anyone had a similar issue, or could maybe tell me if I should take this to a transmission shop, or what? I'm pretty well stumped don't know if I should stop driving it.