Latley my tranny has been shifting weird. At WOT it shifts nice and firm. It works great on the highway, around town though, depending on how much gas I give it, it may shift fine, slip a little or sometimes, when I floor it (either speeding up or down shifting) it goes to 3rd then a second later it shifts right into 4th? It's really never done this before. The tranny was rebuilt 27K ago with Kelvar racing clutches, etc. Does this sound like the clucthes are going or maybe the CPU?? Thanks for any input.