I'm glad they're sharing the parts list and the results even when they don't end up like they expect
A lot of guys are out there trying parts that don't help and wasting money so at least they can use this as a helper to know what works
You're not going to need overdrive until well past 150mph...
I'm more concerned with the spread on the way there. The old MT82/Tremec will have 30mph, 30mph, 40mph between three gears, while the new MT82D4 has a whole 40 and 50 mph between just two gears...
70-170 in the Tremec and 80-170 in...
I'm not paying MSRP for an American made vehicle either.
Of all the new cars I have bought in my life the only one I paid MSRP for was Honda Odyssey right in the middle of COVID
The fact that it's winter, plus the car not being driven much, that could be normal.
Did they do a compression test? That should rule out something like the engine being bad.