What's a forced lube kit? And what would be the best shift kit?

 

Damn, Talk about being a day late and a dollar short... Sorry about the delay to respond. A forced lube kit takes pressure and fluid from the test port and sends it to the output bushing of the tranny which will help with output bushing wear and driveline vibration common in our trucks. The 4r70w and 75w both have the problem. Highway Patrol started doing it because of driveline vibration and output bushing wear at high speed. More lube less wear and longer bushing and u-joint life.