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It is possible to overinflate with ANY manual system. Might even be possible with an automated system unless the software limited the fill time of a system chasing a false pressure transducer reading... not sure what if any the original CTIS used for safety beyond requiring 2 solenoid circuits...

And just a little smoke:)

Is that a QR fitting on the back end of the new tank to attach an air hose to?

Yep, I believe a pair of 8D’s would fit. That is why those cables are excess for me, I dont need them with 2 batts. If I were really in a cold climate, I might contemplate a larger bank, but I would also probably contemplate a propane or diesel preheater :). My Hab will ultimately provide...

Ok, so my CTIS ECU is a brick with 5 solid lights and if I spend too much more on this project my wife will probably bury me in it:) That being said, I am also a bit of a control freak so I am converting to manual CTIS. I have looked at the valve and regulator method but decided to go about it...

I might have what you need? I shifted to two type 31’s so these are excess to me.

My CTIS is bricked(5 solid LED’s) so I am working on a electric over pneumatic manual control right now. It should be very do-able with a programmable microprocessor. The hardest part will be interfacing and interpreting the speed and pressure transducer signals. IMO, Nothing fancy in the...

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Which brings me back to an earlier thought. The actual transmission input RPM sensor failed(passenger side bottom of the transmission about 2” back from where transmission joins with the engine bell), and some bright light did a field alt to use the engine RPM sensor to keep the vehicle...

Yep, but I am thinking they are meaning engine speed(RPM) :)

Yep, that same speed signal that feeds CTIS also feeds the speedometer... I think the sensor near the bottom of the forward transmission bellhousing is another engine/input RPM sensor as it is so far forward on the housing. It is labeled “transducer, motional”. A vehicle speed sensor would...

That was why I asked the OP to make sure we were talking about the same sensor, on the yellow cat bellhousing, right behind the block, about the 2 O'clock position when looking toward the rear. He confirmed this... I have no other sensors on the cat half of the bellhousing(yellow). The only...

OK, did some test drives to get a feel for the drivetrain(pulled a little to the left when braking:)) and did them all with the RPM sensor disconnected. Pulled the sensor and did some intital tests in my yard, forward/reverse 100’ runs AOK. Took it down the drive and out onto my road to work...

OK, I am about ready for some test drives, I will try disconnecting mine.

where is it physically located on the engine/transmission? I just want to make sure we are all on the same page. The one on my 3116 engined 1079 is on top of the cat bellhousing right behind the block left of center... Mine was a bit of a basket case with a ton of electrical issues. The...

Starting in second is correct, but If it were normal, it should have a 7 off to the left indicating speeds available up to 7... I will look over the A0 schematics again tomorrow, but the only speed sensor I see does not connect to the Allison at any point that I have found. That was why I want...

Got a pic of the sensor? What year is your vehicle?

Snowtrac told you why. The HEUI 3126 and C7 use electric over hydraulic fuel injection. Their ECU’s may use that signal, the MUI 3116/3126 are dumb old diesels and dont need it unless you want a tach... I think your trans issue was not related to this sensor. Quick check is to disconnect it...

Oops, i was thinking it went to the trans controller... On the A0 schematic the RPM sensor goes to the tach plug and the freq divider box. The freq divider output goes on to the STE/ICE Plug. Trans RPM appears to be sensed internally in the transmission...

The front ones are vented because the front lines feed into 2 way check valves on the service line and a regular check and a 2way check on the emergency line. If you have noticeable air leaking out at the front gladhand vents, you need to track down which valve is leaking back and fix it... If...