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« Last post by Roger Milne on April 10, 2026, 01:36:22 PM »
So just a follow up on this in case it helps others.
So we just drove 2000 miles from AZ to SC. As I was a little skeptical of the gauge and it's accuracy, I was able to get in on the Aladdin system this RV has installed and actually has a sensor page much like modern cars have with temps and pressures from various components.
Thankfully this one had both Coolant and Transmission temps and the actual readings were exactly where I'd expect the temps to operate at under driving conditions.
What I will say is this. The CAT and Allison analog gauges work, but at slightly different values compared to the digital ones on the Aladdin. But they did show readings and the Allison more closely that the CAT.
The other thing I did notice is the CAT engine itself, seems to run very cool and it was only during extended hill climbs in the AZ and NM hills that it climbed to what I'd expect them to run normally. But even during continuous road driving they CAT ran about 130-150* digitally and about 1/4 the way off the peg to halfway on the analog.
This is my first experience driving a big diesel and this type of transmission and I can say it is really cool to just watch these rigs, just pull and pull, when going up hill. A very different experience from driving conventional vehicles where the RPM increases dramatically going up hills.
Can't wait to drive it more.
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