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Yes the towing process is still the same, as that process(pull rear axles and lift front, or pull both driveshafts) is to protect the transfer case. This is the same for any AWD vehicle. Flat towing may be a little more forgiving now as we have halved the axle and DS RPM for any given road speed…

Well thats just the point, this mod removes/takes the planetary gears in the hubs out of the equation… in doing that it also cuts axle, differential driveshaft and transfer case RPM in half, and drops the engine to near peak torque RPM(or less) at highway speed…

What General said… the programming is based on the flow thru the engine provided by known components. You alter that flow by changing parts, the programming has no way of knowing this(no mass airflow, no O2 or even EGT feedback. kinda reminds me of hacking early toyota EFI…

Finally got an answer back from an Allison service center rep. He had trouble accessing info,as the Allison system was down for a bit, and was pretty busy, but he didn’t forget about me And ran the info down. It does appear that the latest composite thrust washer P/N 29545936. Does supersede...

Yea the 3 engines are a little different. Peak Torque on the 3126 is 1450RPM, on the 3116 it is 1550RPM. i didn’t think the C7 was so low… They all share one thing in common though, they all drop off drastically in available torque as you approach 2600 RPM…

I worked up this information for a FB discussion and thought I would share it here: Several have reported pulling hills at highway speed better with the new hubs. This actually falls in line with published information. You start running the RPM past peak torque, the available torque falls off...

The relay I was discussing provides power to ctis when de-energized, so it needs to stay or pull it and jumper pin 30-87A. Pullung CB66 will disable its function though...

Well you saw them blackout… The fact they blacked out all by themselves for you indicates to me a bad lights witch…

It should still blackout. Its not as much about night vision as it is about light discipline(You look at that display with NVGs on and they will probably bloom out:)) I think I got my brain around how the circuit is supposed to work. When you select blackout on the light controller it sends...

I cannot remember if it applies or removes power to dim the display. On the A1 K29(blackout relay)controls this using the de-energized contacts. CB66 provides power from the light sw to energize the relay. So with things turned on and the trans and CTIS visible, what happens to those displays...

Since everything was still working, it does sound like the dimmer/blackout circuit went wonky…

Yea I havnt found that spec either:) I have seen a GM spec, 300HP@2600 RPM and 732FT/LB. So guessing ~715FT/LB for the 290hp... The 1079 curb weight is 18,834, but that includes 1000# of crew and fuel weight. Fitted out for camping maybe just over 20K? Lets say 22K... 715FT/LB nets you...

This is one of those places where alignment is important. Usually with a turbo involved there is typically a flexible section fitted into the mix to take any posdible strain/leverage being applied to the downpipe from the rest of the exhaust, out of the equation. Since we dont have a...

I like it. Was working on a way to power a set with an air motor:) I think my wife would be more comfortable getting in or out with a more solid and visible step..

Manual says the diff level is acceptable if within 1" of the bottom of the fill hole. I forget where that is exactly, will have to look it up. The rear hubs are tied to the axle pumpkin so will ultimately find their own level, and any excess will flow bacl along the axle To the pumpkin. But...

Got a peak torque spec For the 290? Oh and a target weight?

Keith, that wasn’t really the point I was trying to make, he could have gone a lot slower, even down to a crawl, because it appears he had the torque he needed to do so on that slope. Like in sand and snow, a little momentum can help carry you across fluctuating traction, but it doesn't last...

Sounds like you exceeded peak torque RPM, so you had torque to spare. The real test would be to stop on the hill then start again, noting the engine RPM at which it just starts to move again. I have a 3116 so that is where my math is mostly based around. I have not been able to find an...

Thanks! I think the transmission is happier being more heavilly loaded. I suspect the pulse width control programming was never quite right or even optimized for the 7.8:1 axle ratio. Since I started playing with one of these and its hard shifting(mine is a cab and chassis at ~14K), I have...

Never seen one of those before. The ID plate in one of your pics says made for Cummins. Delco discontinued production of the 30SI, but you could probably still get parts for it, well maybe not for the dual volt circuitry/control portion… I way prefer commonly available/in stock, to expensive...