I have searched the site, but have yet to find what I'm looking for. I start braking coming to a red light and never let my foot off the break, until the light turns green, and when it feels like its a ton of slack in the drive line. I can slowly take my foot off the brake and I can feel the slack letting loose, if that explains much. Its like the rear brakes are pushing the rear end up in the air extremely high and wheel I gas it then it goes down. Any thoughts

 

I got that same feeling in my 450. I always thought it was because of my 2 piece drive shafts.

 

i've heard you need to grease something in the driveline. Maybe someone will chime in.

 

Mine is in the shop right now for the same thing (and another radiator). I let the mechanic drive with me to feel the pop when stopping and then starting up again. If they find what it is I'll let you know.