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My two cents: For balanced performance and fuel efficiency 3126B 330 hp 3.90 gears and eco hubs 85psi tires spin 2000rpm at 60mph in 5th gear CAT suggests: 2000 rpm @ 60 mph (97 km/h) subject to the following: Maximum cruise speed of 65 mph (105 km/h) or below. Maximum recommended engine speed...

Looking at our crawl-ratio sheet showing standard 2:1 wheel hubs, EcoHubs, 3.90's and 3.07's at rpm's for 1440 (peak torque), 2000 (suggested 60mph), and 2400 (suggested max) rpm's: 3.90's hit CAT's suggested "best balance of performance and fuel economy" in 5th gear. Thank you @Xengineguy...

CAT 3126b spec sheet states: For the best balance of performance and fuel economy, spec axle ratios and tire sizes to obtain: 2000 rpm @ 60 mph (97 km/h) subject to the following: Maximum cruise speed of 65 mph (105 km/h) or below. Maximum recommended engine speed at cruise — 2400 rpm. Minimum...

@Suprman likely has the right CTIS controller for your unit and more important: will tell you if he doesn't and confirm a unit he has is not 5 solid. Using a 900 series is not a big deal, you just have to pull pins on the controller to isolate the J1939 circuit from it. There are several...

@GeneralDisorder is correct: 3.90 is closer to ideal with EcoHubs. 4.50's (or 4.44's) would be awesome on these rigs. Seventh gear would show up on the flats. We have no experience with the 3.07's. On and off road so far we like the way our truck reacts with 3.90's and EcoHubs—

@Plasa units are really nice. And the circuit board does all the thinking. I have been looking at how to incorporate the data and push button face into the dash/central console and stashing the rest of the innards with the PCU behind the foot kick—

Something like SendCutSend? There is another one, too that folks here like—

Repainted the dash as part of stripping the cab to insulate, build out consoles, storage, carpet and paint the interior. While putting the dash back together tested if we could move the lights to the outside and transmission to the inside, though the light switch wiring is too short. Still...

Sounds like the resistor in the J1939 circuit burned up, it lives under the PDP, there is another in the engine compartment near the engine ECM. We replaced our dead ECU with one from a M939. These CTIS ECU's conflict with those on the LMTV. Or it did on ours, burned up R12 and R13 until we...

Awesome, it looks intriguing. Keep the pictures coming. We are very visual—

We have the laptop you made us and know I have barely scratched the surface on what you installed for us—

I hope to be as good as you one day at finding the real parts. Do you offer a class Rick?

Now that you say that, it echos. You said it before and I forgot-

I would argue that insulating the roof is at least as important as the sides, even with the solar shading. The shading will greatly reduce radiant energy gain, though will do little for conduction and convection gains during hot times, and nothing to reduce condensation at the ceiling's thermal...

After our off road experience in the empty truck showing a lack of rear traction and reviewing the difference between the tare front and rear axle weights we are planning to move more weight rearward in the habitat in an effort to attain more balance. We have also noticed while hauling debris...

Are you building a gin pole, too?

Interesting. Innocent until proven guilty is the law of the land. Register in the county where you purchased, take seller with you to the tax collectors office? Stick an old trailer tag on it and forget it? Weighing in Texas is a new requirement I have heard from others when titling. A...

Nice looking unit. Hmmm. Looking at the requirements for title and/or registration for a Texas trailer I see a requirement for proof of insurance, though not inspection. Trailers under 4,000# gross weight do not require a title—

Right. Insulation adds resistance to conducive heat exchange. Your experience is encouraging. As I recall your metal box is also painted a light color in a satin or gloss finish. Once we paint the roof bright white and perhaps improve the reflectivity with a satin or glossy finish less...

All we have done with the AC so far is the bench test. Most of the insulation is in place now on the ceiling and rear wall. Need to finish the AC installation. While the cab is stripped out we are going to paint some trim and all the bits we pulled out of the dash; build out and carpet the...