Overdrive lockout on ford e450

[Redram99]

Does anyone know if it’s possible to wire in a switch to lockout overdrive?

It would be great to be able to drop the tranny to drive in advance of a hill. I feel it would put off shifting to 3rd significantly.

This would make cruise control much more useable.

I have already installed five stars tuning which made a night and day difference.

Thanks.

[Tvov]

What year is the vehicle? With my 2008 F250, the tow/haul does not "lock out" overdrive, it delays shifting into it until you are cruising on flat roads. My truck has the 5 speed torque-shift transmission.

[rockhillmanor]

jerseyjim wrote:

Just push the button located at the end of the gearshift selector.

Little light comes on says "off".(Overdrive is now turned off)

Why you would want to do this permanently...I don't understand. On a flat road, take advantage of the lower RPMs, especially in CruseControl.

Yup! that's what the tow mode button is for! :B
Push a button and overdrive is off.

[Mich_F]

If you're driving on a lot of hills, I'd suggest turning off the cruise control and engaging the tow/haul feature, if not already in use. I believe it's a good idea, to always have tow/haul turned on.

[JaxDad]

Keep in mind that once the TX drops out of overdrive the converter lockup releases also, when that happens the slippage creates a lot of heat fast.

Unless you have a TX fluid temperature gauge you could very quickly get above the critical temperature of 225 deg. F.

Bad things happen very quickly after that.

[jerseyjim]

Just push the button located at the end of the gearshift selector. Little light comes on says "off".(Overdrive is now turned off)

Why you would want to do this permanently...I don't understand. On a flat road, take advantage of the lower RPMs, especially in CruseControl.