Hey everyone. I was hoping to get some answers on an issue my car has been having.

When I am accelerating at about 45 mph there seems to be a second of lost power where you can hear the exhaust stutter. The same issue happens at 55 mph. If I floor the accelerator at either one of those speeds the car will downshift but only rev as if it were in neutral and not go anywhere.

For some background my car has 4.10 gears, a canned Bamachips 87 octane street tune, JLT cold air intake and SLP Xpipe...

Auto transmission not downshifting properly