The Heinz

I'm not well acquainted with "older" Allisons, but if your transmission has a TCM, it could be that. We've seen many failures of newer modules, sometimes even in brand new trucks. If you have one, it's usually found behind the center dash. I'd first try the wiring diag before you sling parts at it.

If you shoot me at least the last 6 digits of your VIN I can see what crosses are out there.

As long as I'm not a CEGR ASET, we'll be fine!

I have to start off by thanking ya'll for recommending PAI to everyone, and me by extension. Right now a super common valve cover gasket for the MP series (22777560) is super-unavailable, but PAI has plenty. I would likely have forgotten to check PAI if I didn't see it constantly mentioned around here. Thanks to you, I have a moderately satisfied service team. PAI is an awesome source I mentally filed under "Another aftermarket website that has iffy quality," but seeing entire overhaul kits recommended by ya'll, I've changed my tone. Another source that has helped us out in a pinch is Automann. Unfortunately, Automann's catalog and ordering process is open only for registered distributors, which my dealer happens to be. I've used them a TON for clamps, sensors, and such that Volvo couldn't be bothered to keep in stock, with little to no returns. The only thing I don't recommend is the CAC boots for MP engines, they for some reason are bigger than needed and blow back off immediately in our experience. I'm not sure what it takes to become a distributor, all I know is we get a higher commission rate when using their parts haha. I've only messed with Lippert a little bit because they rarely have what I needed, but I was told they were a good source for old, "obsolete" parts. They supposedly buy obsolete inventory from OEMS of all kinds, but I only have access to the Mack/Volvo store. Lastly, I would try to avoid Weller if it was an option for you. We've had constant failures of transmissions and transmission control housings on top of difficult warranty processes; they typically don't like to pay labor either. The couple of differentials I've seen haven't returned, but the amount of failures we've seen have made our service department no longer recommend. Sorry if this doesn't exactly fit the forum, but I wanted to show my appreciation by also recommending a couple of other sources, even if they focus on newer trucks. THIS IS NOT AN ADVERTISEMENT OR ATTEMPT TO EARN YOUR BUSINESS!! If you ask for my help, I'll gladly do so, but I'm not here to benefit off the forums. I get my money from Volvo haha.

Sorry to revive a super old thread, but I felt I needed to chime in about this suspension now that it has been offered for several years... Pretty much all of the criticism of this suspension holds true. The V-Rods (the triangular "torque rods" from frame-to-diff) are notorious for failure to the point two separate TPI's were created to "address" the failures. One is about using bronze races on the V-rods, the other is about using a four bolt pattern setup instead of the standard one bolt, which involves REPLACING THE DIFF HOUSING! Yes, the HOUSING, just reuse the internals of the diff silly! We see them a lot on trash trucks, maybe a few dump trucks. Camelback seems to reign supreme for most dumps, concrete mixers, and pumpers in our area. They are probably cheap to install, but they are NOT cheap to repair. Just one V-rod alone costs an average of over $1k! ATRO kits exist for the older models, but the 2020 truck I am creating an estimate for that spurred me to research and post here doesn't have any crosses with any ATRO kits sadly. Maybe someone will find some use with my rant/info dump these many years later, or at the very least it entertains someone.

That's what happens when I learn the wrong vernacular... So many people above me call parts the wrong name I've picked it up as a bad habit. You're right, basic engines are the ones we always order, but you'd think if you can order a completely assembled engine, they'd sell you a short block...

If you shoot me your VIN, I can see if there's anything I can help with. I occasionally see miracles every now and then! Volvo has issues with keeping anything in stock, much less parts that commonly go out. Imagine how you'd feel when the dealer you just bought your brand new truck tells you they issued a recall but parts are at least a month out! Or taking your SCR equipped truck in for an MIL only to learn they updated the DEF Level Sending Unit to require a pigtail that's more than a month out!

You're right, it's the oil supply line. Just be careful with the o-rings on the two nipples on each end, unless you match up with a kit from a parts/hardware store, they only come on the piece themselves. Most of our techs end up requesting them, but I doubt most jobs NEEDED them.

I will say it's been a while since I've quoted a short block for an ETECH or older, most of our customers have been asking for overhauls lately. Maybe there's something I didn't know...

I'll I'd have to find a VIN or part number for one, we don't see ANY E6's here. I know from past research that Mack still makes E7 rebuild kits/short blocks, usually per order. I've used PAI for smaller parts a little bit, Lippert as well. Automann has been the most helpful for me lately.

I completely forgot that the air compressor has coolant lines running to and from, goes to show I'm not that experienced! I don't recall that happening to any trucks in the shop, but we've had a bad air compressor that got misdiagnosed into an entire short block R&R... I'll chime out for now unless someone needs some help with parts...

My job is usually pretty boring, as I'm a shop parts salesman. I exclusively handle parts for our shop "technicians," so I thankfully never have to deal with customers on the front counter. We still have our own frustrations don't get me wrong... We've seen some crazy failures before, from a previous owner running exhaust manifold studs too far into the block, destroying two pushrods, to a roadside service (that Volvo uptime called for the driver) botching a wheel seal job and ruining both spindles, hubs, and brakes. Fun stuff. EDIT: I somehow skipped the part about bad parts people: It can go both ways, but usually leans to bad training on the company's end. My training was being put next to the older guy that was a wealth of knowledge, no actual company training at all. If I didn't have a brain for it, I wouldn't have been able to keep up.

I GREATLY prefer Cummins over any other lookup. It actually makes sense and, like you said, actually has a functioning search. The only issue with Cummins is the Aftertreatment Device section, but that's because the OEM never sends them what device was installed at the factory, so Cummins lists all the available parts. At least Impact will show those parts, but Hino/Isuzu couldn't care less.

Haha, I still respect my elders, I was raised that way. I can't imagine watching a prestigious brand like Mack get dragged into the dirt by a European truck maker. I agree that Impact can be really bad (nowhere near as bad as looking up UD parts, that company is an abomination), and the majority of parts guys are lost most of the time. I like to believe I stand out from them however!

There absolutely are! I found this forum trying to research parts for an older E7 ETECH one time, and kept coming back since. The forum was extremely helpful in giving me info while researching the Jake assembly on a different ETECH. Lots and lots of amazing information here.

Was going to suggest EGR cooler, but that apparently won't be a problem for you (Very smart of you). We've seen oil cooler/side cover failures before on both 11 and 13 liters, that could very well be your issue. I also wouldn't discount the possibility of the head gasket leaking, but we rarely see that at all.

I don't exactly want to make it public, but I'm not super far from you. MP's and mDrives are absolutely my biggest money maker, that's for sure.

Hey ya'll, I've been lurking long enough I figured it was time to make an account. I've been a parts salesman at a Mack dealer for 3 years now with 3 years of Mack fleet technician experience prior. For the past 3 years I've been working as the shop parts salesman here, which flowed nicely with my previous experience, and has enhanced my knowledge and love for old Macks. Sadly, the oldest truck we've had so far has been in the early 90's, but my love for the days of semis long past keeps me invested in the field. That and my ever-increasing hatred of Volvo and the bastardization of the Mack name. Yes, a 26 year old is allowed to have good taste. I'll try to browse the Parts Wanted section to see if there's anything I can help with, but unfortunately my resources only cover trucks that are so old. Anything to help the cause!

I'm by no means qualified, but it sounds like your SCR might be dead. Pretty much every truck with 4094 that rolls in our shop leaves with an SCR. There were some times new NOx sensors resolved the issue, but most resulted in the truck getting a new SCR. Did you use an OEM NOx sensor? Most aftermarkets we tried ended up not working, to the point our shop won't use them at all.