Overdrive lockout on ford e450
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 si...
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Home Skillet wrote:JaxDad wrote:
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.
The torque converter will still lock, regardless of the overdrive selection.
This is true. Even on my lowly 4R100, the torque converter locks up in third gear after maybe half a second, and so far as I can suss out will also lock up in second gear if appropriate. I don't think I've ever cruised in first long enough to find out if it locks up there or not.
Newer transmissions are generally more likely to lock up the torque converter than older ones so as to meet fuel mileage goals for the vehicle makers.
