Chevy 8.1L/Allison combo
Hi there, Does anyone know if when an '02 Silverado with the 8.lL/Allison set up is in Tow/haul mode if there is any sort of 'engine braking?' Seems to me that a tap of the brake pedal when on a d...
Forum Discussion
hornet28 wrote:
Actually taping the brake doesn't cause it to immediately downshift. What it does is keep the truck at the speed you were traveling at the time you hit the brakes by downshifting when needed and not just one time. I saw rpms as high as 4500 coming down some mountain roads with my 02 8.1/Ally
You’re both right. If I tap the brakes when the RPM’s are low, it will nearly immediately downshift. It knows and/or quickly senses the increase in RPM when you lift back off the pedal. Also if you just hold the pedal without decreasing speed, it downshifts to help out. It’s possbile different years have different programming too.
