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The one behind the grill is the most important for the gauges and computers in the cab and powered by the cab ignition relays to not freak out. Put your meter on a DC Volt setting that will read ~5v and with everything turned on (engine, lights, etc) check for voltage potential between the...

Cab grounds......

Depends on the tune you are running. On the 370 HP map I have seen boost pressure around 33-34psi.

Wait till you have more weight. That will likely make it less harsh. I don't notice anything untoward with the downshifting down grades. Have a steep one from the grocery store to my house that I travel regularly. 🤷‍♂️

That's definitely one of the worst situations you can encounter as a tech. Someone that did something really ignorant before you came on shift and then left without leaving any signs or notes. An actually qualified technician is well aware that all vehicles have electrical connections that are...

Agree with Ron. Wouldn't mess with the Allison programming. There's no reason and redline under decel with no fueling is hurting nothing. Higher RPM increases hydrodynamic film strength in the main and rod bearings and with no fuel there's also no load. There's no benefit to not using the lowest...

That truck is nearly 30 years old. I barely made it home in my 2008 back in 2021 when it was *only* 17 years old. How knowledgeable are you in the platform? How experienced of a mechanic are you? I flew to TX from OR and had a whole lot of tooling sent ahead of me. Made it but was lucky...

Tires...... They will likely be extremely dangerous.

I haven't noticed anything significant from mine unless it's over filled. Once it finds the level it likes (assuming over filled) nothing much is evident from the breather. Maybe a little vapor..... I'll have to throw a go-pro down there and film it I guess to really compare since it's a pretty...

Lots unless you run them two quarts low. It will spit out what it doesn't want. CAT redesigned the breather to be more like the 3126 to avoid it but it doesn't fit under our cab. The military guys all know about it and just run them halfway between the low and full which is 2 quarts. That's...

You have an A1R, or A1P2...... The "annunciator chase sequence" you called pacmaning is the annunciator panel's way of telling you it has no coms with the MMDC. The fact none of your gauges are working also indicates lack of drive from the MMDC. So check that you have proper power and ground...

Correct. And it stays engaged down to around 20 or less if it can remain locked in 2nd (trans computer decides).

Operation of the exhaust brake is largely the responsibility of the engine computer. There are a couple options that can be changed in terms of how it interacts with cruise control for example. The ABS computer also knows about the "retarder" and needs to be aware when it's in play so there's...

Are you moving fast enough? Third gear won't necessarily be going fast enough to authorize the exhaust brake. It does stop operating below a certain speed. The engine computer and transmission computer ultimately are the gatekeepers - the engine computer has to control the exhaust brake and you...

The newer Bussmann CB's are totally redesigned and they use the "mini" (ATM) blade fuse interface. Sadly this makes them incompatible with the older trucks but maybe Bussmann makes a similar variant for the normal sized blade fuses. That all being said - I have not experienced or heard any...

I would use Viton or Silicone o-rings. HNBR might work too - those are used in refrigeration/AC systems so they can handle some oil and high temps/pressure - AC systems routinely hit 300 psi. The factory one's are Nitrile which is essentially just vulcanized tree sap with some carbon and extra...

The gaskets are installed dry...... I've done half a dozen of these with the RNT-26 kit from Haldex without issue. Check the surfaces but I would guess it's probably that gasket. I haven't seen that one before with the pre-applied sealant stripe. Make doubly sure that unloader access plate is...

Safety glasses..... Jock strap. Two condoms. 911 keyed in...... When they pop you WILL lose that death wheel. Where it goes.... Nobody knows.

All the other newer military stuff (largely from Oshkosh) use some variant of the VIP line from IMMI. The HEMTT actually uses almost the same wheel I'm adapting and those are extremely common. Our S&S wheel was inherited from the Steyr which didn't have power steering (in all cases anyway) and...

Sure.... But there's not much to see without looking really close because it's a 2008 M1079 A1R that I keep looking almost like it could have driven out of the Motorpool yesterday if you weren't intimately familiar with the van window sizes and that these were not equipped with awnings. Most of...