Originally Posted by jpaskell
Thanks for the note. If I leave the OD turned off, will the transmission not hunt back and forth? Owners manual says keepOD off ( button pushed in and no OD available) when towing. Or am I getting confused between off and on. To me off, is as normal driving and overdrive available. On is when towing up a hill and you don't want transmission to shift in and out of OD.
The V10 has no problems pulling it's just going by a gas station that's an issue. I love my truck. Thanks again,
OD is the Over Drive Gear. This is a Higher gear.... ie.. 1st gear...2nd gear... 3rd gear... OD..ie.4th gear. The higher the gear when going faster the better the gas mileage. "On" is 'normal' driving'... no towing.... to get to your highest gear when driving faster...
With the OD 'on' or 'off' the truck will hunt for the 'gear' that it needs based in the RPMs and gear shift setting in your transmission. Your owners manual is says to leave it out of OverDrive to force your truck (governor) to run higher RPMs at higher speeds.... to make pulling very heavy loads easier. If the truck is able to pull the load at lower RPMs then your fuel consumption will be lower and the stress on your truck lower. You may be stressing your truck for no reason and burning more fuel than you need to.
On my truck (which is Chipped, Tow/Normal/High Performance modes) when I am pulling my TT at 64-65 mph with OD 'on', my RPMs are 1800 RPMs.... the truck is not lugging down and all is smooth cruising. If I take the OD 'off'...then the RPMs will shoot up of 2200 RPMs and I would be in a lower gear.....
'I' will not race my engine that high and put so much stress on my 3rd (instead of 4th) gear. I leave my OD 'on' all of the time.
I would suggest going to a truck forum with your make and model truck and talk to those guys/gals. They will know your v10... in and out...and give good suggestions.