pianotuna wrote:
Desert Captain wrote:
Greater efficiency is at your fingertips when you simply engage the Tow Haul mode. The weight of any E-450 is sufficient to justify the use of TH even if you are not towing... you are hauling 14,500#. Now put the money you just saved into a fund for any unforeseen repairs that may be coming down the road.
As always... Opinions and YMMV.
:C
Tow Haul Mode activated causes RPM to go up considerably. I don't see how that could save fuel. But do enlighten me please.
I "pay" myself mileage so there is always a ready repair fund.
Fully loaded (all tanks full and 2 folks with their belongings) I come in at 13750 lbs.
Tow/haul changes the shifting strategy and the pressures on the transmission to take better advantage of the HP/TQ curve of the engine. It also will stretch and hold out the upshifts a bit longer and might downshift a bit quicker to prevent lugging the engine below peak HP/TQ for the given load.
T/H basically does what some tuners do if you think about it a bit, but tuners don't do automatic downshift braking..
Tow/haul may or may not improve MPG, sort of one of those "it depends" type of things. Can't say I have ever seen better mileage with it enabled but I only enable Tow/haul when I am towing or hauling something heavy so the mileage drops anyways.
With your already heavy rig, it is possible Tow/haul may improve the mileage a bit if you never use it.. Since you can't shed any weight, I would have to say you really should be using T/H all the time as T/H mode adds in automatic downshift/braking which is a sweat feature and if nothing else T/H will save a lot of money on brake wear. I don't miss the days of manually dropping gears going down grades.
