I replied to Tom via email, but thought I would also post the results here. I drove from the Phoneix area north on I17 and did a couple fairly steep climbs in 3 digit outside temperatures. I soon arrived behind a slower tanker and chose not to pass as I believe the signage requested trucks to stay in the right lane, and in this case I was more a truck than a car. I had no problems at all with going up or coming down. The posted nunbers are from my VMSpc 20 minute maximum display which shows the maxium of the values reported over the last 20 minutes. Cynthia wrote down the numbers for me after we crested the big climb.
Here are the data points as maximums from the climb:
Coolant Temp 207
Transmission Temp 205
Oil Temp 202
Rpms – 2034
Russ
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