When to turn off overdrive?

[RJ2]

What is rule of thumb on cutting out the overdrive.

 

[carson6]

mine

with my smart box on it shift's into overdrive @ 50 which let's the engin rev. but keep's the egt low and wow! dose it go !but with the box off it shift's @ 42 which is great for lite acceleration but lug's the engin!

 

[Boldt's Wagon]

While towing an 11,000 lb fifth wheel, I turn off the OD in hills or mountains, with headwinds, below 1800 rpm in OD, or when boost is above 18-20 psi.

 

[B.G. Smith]

Overdrive

I turn mine off (when towing) when driving in town or in situations where I can't drive above 60 or 65 mph. I also turn it off when descending a grade while towing, it will give you some additional engine braking all the way down to about 12 mph with OD off. bg

 

[RichB59]

DTT control

box on mine shifts into OD at about 58 and comes out at the same time. I like it no lugging and it really takes off when she shifts in.



Rich B