In regard to the temperature affecting whether OD engages or not, is this something that I should be tracking down on the engine side? Or should I be concerned that something in the trans is working incorrectly, sir?

I am going to change my thermostat, just in case it's malfunctioning and causing the engine to run cooler than it should.


Trans engaged TC lockup and OD perfectly all afternoon, because outside ambient temp was in the 70s. Miss is definitely something outside the trans, if my thinking is correct. This is a definite relief because I was still thinking I'd accidentally messed something up in the build.

Traffic was too heavy for me to use cruise control, will try tomorrow to check brake switch.