Im not sure what it is but when I reach about 50mph the engine feels like it shuts down a bit. The rpm's drop a bit and it has no ***** what so ever unless I put the pedal down about 75%. I dont know if it is Overdrive kicking in or just not enough fuel or air getting in.

 

Well between 45mph and 50mph it goes to 4th gear/overdrive. It does feel sluggish when it shifts to 4th if you have 0 mods. Hit the accelerator when your cruising in 4th gear at 50mph, it will downshift and speed up quicker. I imagine after that 75% of throttle it automatically downshifts.

 

Ok I thought it was overdrive but it just felt weird. I have a flowmaster exhaust that came on the car when I got it. The sound goes dead almost thats how I first noticed it.

 

Yeah the flowmaster will stay in a 1 tone droney type after the shift.....