Just installed juice box and drove in level 3. I notice after lock-up under heavy throttle the tach will jump 100-250 rpm's or so and then drop back down and then jump up again while speed increases. I assume the clutch is slipping. Or is this a defuel thing with the up/down rpm thing? I switched down to stage 2 and it didn't do it as bad. I still need to install my A2 monitor so this was on the juice only. And it feels like it still wants to rev for a split second or so after I let off pedal. Is this normal?