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Originally Posted by coolfeet
What is the Tow Haul Switch? I have the O/D switch on the steering column.
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Same thing but on the 6.0 paired with the 5R110 torqueshift it actually does not turn off overdrive. Just modifies the shift points and once it get's to a high enough speed it will still shift into overdrive. All it's doing is holding the trans shifting till it's higher in the RPMs. You might still see high EOT and ECT but the engine is actually running cooler. It doesn't make sense but it's a diesel
Quote:
Originally Posted by coolfeet
I never knew that higher RPMs will cool the engine faster.
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I know it sounds counter-intuitive but besides the tranny and excessive shifting when going up a steep grade it keeps the engine from lugging at low RPMs which also creates heat. EGTs will be lower because the engine load is lower due to the higher RPM.
Quote:
Originally Posted by coolfeet
I don't have a pyrometer. Probably a good idea. I never tow and since it's a passenger van, it's never fully loaded. What pyrometer Are you using?
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I have autometer gages. One is a pyro and the other fuel pressure and I'm about to add a transmission temperature gage. The rest I watch with my ScanguageII. Always vigilant.