well, it's about time to replace my tranny and diff oil along w/ an oil change. so i got my filter, and our dept had this stuff you add to your ATF fluid. It's called lube gard auto trany protectant. says it will reduce wear on the parts, fix small problems, ect, ect. One of our techs put it in his truck that had some shuddering and he says it went away. So I figured I may as well try it. If it blows up, more incentive to put in that 5 speed sitting in my garage. yeah, i'm lazy!!!