Review on JET 89110 Auto Transmission Module by Marquel Henry

The performance of this product is excellent. I have 475 miles on this chip. Changing E4OD in my truck has greatly improved. Without a rev counter, an upshift would be imperceptible. The torque at low speeds is noticeably improved. I can go up a steep hill at 1500 in overdrive. I also have an 8.6% increase in fuel economy. My tow fuel economy went from 8.5mpg to 9.2mpg. This is for a 7.5 Gasoline Super Cab 4X4 Truck towing a 20ft 10.5ft high steel trailer. My highway mileage increased from 11.6 to 12.6. This was for a 240 mile ride on a 100 degree day. The fuel saving alone pays off for the chip in 6,900 miles.