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I’m a flat lander from Florida driving an 2003 M1079A1 with a 3126B asking the question! As I’m currently parked at 8,800 ft above sea level. What is the maximum elevation our trucks can reliably start and operate? What effect does elevation have on diesel engines? Max elevation for the 3116...

Sometimes you have to do something just for FUN!!! This was just that project. As we traveled people always ask where's the gun??? So I decided to make a remote controlled roof mounted MiniGun that shoots nerf bullets! Here is the final video I posted to youtube. There are earlier videos of the...

I'm wanting to have a single place to get all the information for everything involved with changing the 12/24 volt alternator with a readily available 24 volt alternator and 24 to 12 volt equalizer. I'm Primarily speaking about an A1 truck. First the Title of this thread. While doing days of...

3126B oil cooler warped, bad gasket, both…..lots to talk about. In preparation I purchased all the gaskets and o-rings from caterpillar here are all the drawings and part numbers you’ll need to do the job. Also grabbed a can a CAT paint. I ended up not using item 1 or 8 in the picture above...

I was talking with a good friend that goes way above on his research and he recommended using a diesel fuel additive because the newer diesel fuel doesn’t have all the lubricants that it used to. Looking for opinions and or recommendations on what you use and why.

I’m getting a fault code 108 3 Barometric pressure. Voltage above normal or shorted to high source. I was planning on replacing the sensor but cannot verify the location of this sensor any know where it is? I believe the boost pressure sensor is the same part and I don’t want to replace the...

Filling my new eco hubs with gear oil I noticed it was pressurizing. Lead me to check for proper ventilation. While trying to find where it vents to is a lot more complicated than it should be. After figuring it all out I figured I should share this information for everyone. A quick drawing...

I'm removing my drive shafts to replace all the U joints and see that my rear transfer case out put is leaking. Found the part for front and rear # 2950336. Anyone have a good source for these? I came a vender for $260 each but no picture and the description is not accurate. Also has any...

Down to the wire, as I’ve started this project of installing Eco Hubs, replacing front axle housing seals, and pinion seals. My plan is / was / I’m not sure to remove my 3.07 gears and put the original 3.90 gears back in. I’m second guessing my decision, based on a good friend driving a 2007...

A friend was wrapping up a long cross country trip from eastern US to western US, round trip in his converted 2007 LMTV expedition vehicle. He had a major rear main seal failure, causing him to tow it home the last 150 miles or so. Its got me thinking of what can we do to all of our main seals...

Wanting to raise the transmission vent 1-2 feet. Anyone know what the tread is on the vent and has anyone done this? How high did you go, what size hose did you use, any negative side effects?

Working on a 2003 M1079A1 with gen 2 AC. The drivers side floor where your feet are is always damp between the spray in bed liner and the fitted floor mat, same as original just black. Some times it's more wet than other times, but never consistent with rain. Today I decided to find the problem...

After replacing all the hub and CTIS seals last winter I have developed a leak in the front axle outer seal. Oil is dripping at the bottom of the passenger side king pin area. Looks like #59 seal. Mid west says there are requires 2 at each end but I only see 1. What’s the best way to replace...

Does anyone have a success story how they lubricated the front door hinges without removing them? The drivers door is normal but my wife’s side is pretty stiff. The problem is not lack of use either. As we are traveling for nearly 4 months this year. She gets in and out more than I typically...

I have a 2003 M1078A1 with high speed gears and a rear locker. I’ve owned the truck for 8 years. In the last year we’ve traveled over 20,000 miles I’ve used mode countless times. The last few times when in mode for off road use slight turns left and right I’m getting very obvious clunking from...

Thinking out side the box, does any know of a 12 or 24 volt alternator with a shaft on both ends that we could couple the other 12 or 24 volt alternator to in line to help save space?

Just noticed trace amounts of oil venting off the air dryer exhaust port. I have upgraded the drier to the newer style with the replaceable cartridge. Is this normal or am I seeing a potential problem?

So this it what’s left of my duck bill drain on my Gen 2 air conditioner…..does anyone have a source for anything that could replace it?

Any have a civilian part number for this broken plastic brake vent? I found one part but can’t find the part that threads onto the vent. Or am I calling it by the wrong name? The piece on the right is all that’s left the part on the right are two pieces put together that I unscrewed from the one...

So I've been driving this vehicle for over 20,000 miles 14,000 in the last year thinking my oil pressure is great...... But I'm not sure, turn the ignition off and it reads 0 psi as soon as the engine starts it says 75 psi and the needle never moves with RPM. I disconnected the single wire from...