2020 GM/Chevy gas 6.6L max towing test

jfritz_drfritz wrote:

ls1mike wrote:

ShinerBock wrote:
There should be a caveat with N/A gaser tow ratings such as you loose X pounds of rating every Y feet above elevation instead of just saying it can tow 16,000 lbs. Unless doing 25 mph at 5,000 rpm without any power to pass is your idea of towing.

At the end of the test they were going 2600 RPM at 25 mph. Truck wouldn't downshift. I wonder what would have been different if they put it in manual. To be honest I never put mine in manual, but I have not towed the IKE.

I wonder if it fails to downshift because at that altitude the engine doesn’t generate enough torque for the transmission to sense a downshift point

Based off the tuning I have done with my cam upgrades in my 2000 WS6 and my 2014 Caprice which is a 6.0/6L80E so similar. I will bet it is the amount of air the computer sees VS throttle position VS actual RPM.