67RModel

Where the heck is this? California? Look at all those class 8 gems sitting there waiting for new homes....

I take it that is what happened to you? If so that is terrible. I heard the teamsters officers used its members funds to finance casinos and hotels and stuff like that in the 70s. (Hoffa stuff). Didn't know that still went on in more modern times. It seems the politicians on both sides are interested preserving as well as expanding the 401k model. Sometimes its tough to watch you account balance be so volatile but on the other hand I just can't imagine giving so much of your wage away to some union officer in the hopes that they will do the right thing and it will be there when you retire.

Everyone I ever talked to who had recently retired said they wished they would have done it sooner. I have heard several times that guys thought they wouldn't have enough money but once they start getting social security, pension, and 401k distributions they end up making more in retirement than they did working.

Was a B421 diesel? I was always told with B model nomenclature that model numbers ending with an odd number were diesel, and model numbers ending with an even number were gas.....it holds true for everything I've seen but I havent seen much and I don't know a whole lot about B's

Typically there would have been a small rectangular metal plate screwed to the inside of the drivers door with model and serial number, but a lot of times they go missing or disappear if the door was ever changed. The Serial number will also be stamped into the outside face of the frame rail on the passenger side just behind the front shock mount area.....essentially in the front right wheel well area. You will most likely have to get a wire brush and go to town on that section of frame and you will see it.

Somewhat unrelated question: How does that king pin attachment work on your gooseneck trailer? any drawbacks or things you might not think of if you never used one before? Thanks.

Found this beauty on Markeplace. Says it’s a good running truck. Pretty cheap considering the times…. https://www.facebook.com/marketplace/item/344085984529070/?ref=search&referral_code=marketplace_search&referral_story_type=post

That T313LR publication I previously attached was printed in 2/2002 so at least by then….there is also a T313LR21 and T31321 which were rated for 2100 ft-lbs of torque…probably for the Cummins powered CLs and when the MP8 got up to 1860 ft-lb rating. Do you know if the one you got is the LR version?

Yes these don’t necessarily have issues per se. they just don’t seem to have the extreme longevity an Eaton does. This is all anecdotal evidence mind you but all else being equal you will probably have to overhaul a Mack 13 before an Eaton. But 500k plus miles is easy to accomplish in the hands of a good driver(s). Like I said before they also get a bad rap due to their cost. They just have never reached the economies of scale that the Eaton units have. Parts are readily available but tend to cost more. They are also a good bit more to buy. Plus an overhaul will cost you more at shop “because it’s a Mack transmission”. If a T313LR bolted into your truck without any modifications I wouldn’t hesitate a second. A good solid reman will last you an extremely long time and you have to do no modifications to make it fit except for possibly shortening you driveshaft up. Plus you get to keep the truck all Mack which always has a nice ring to it…..

Here is the original Mack technical sales publication for the T313LR.... mack-maxitorque-es-13-speed-transmission-t313lr.pdf

Also for clarification I think the actual model number you would be looking for is Mack T2130....I think T2013 is a misnomer. It was later upgraded and name changed to T313. I think thy are pretty much the same thing so either would probably work. Ratios on the high side are probably identical. Personally I would look for a Mack T313LR. They have the half ratios you are looking for in gears 6-13. Plus LO is 15.91:1....excellent for getting heavy loads moving. The real nice feature in my opinion of the T313LR is the low reverse ratio.....its 28.98:1. That is lower than the LoLo reverse in an Eaton 8LL transmission. I like to be able to just idle in reverse regardless of load or grade and this easily provides that ability. Some would say its too low and slow but backing control with that low of a reverse is unmatched. The T313LR in my opinion is the ultimate "do all" transmission due to the low Lo and Reverse gears. Good enough for starting and backing off road plus it has the splits on the high side for gradeability at highway speeds.

They are readily available overhauled through various places. You can try eprogear.com or Adleman's in Canton, Ohio. They might bang you on the core charge since you are not returning a 13 speed. You could try to find one locally in "operating condition", put it in, and hope for the best. Or you could find one locally for cheap and just use it as a core on a reman or just send it out for overhaul before sticking it in. The Mack 13 and 18s are considerably less desirable and reliable than an Eaton 13 or 18. Lots of range syncro and bearing failures. They can't take abuse like an Eaton can and generally just don't last as long between overhauls. But if you get a good one or a good overhauled unit and are not slip seating the truck you should be good for a long time. They are also considerably more expensive to obtain and/or overhaul than an Eaton.

I was going to suggest this too. If you are able to wind these out to 2000 or 2100 you are able to catch the next gear at 1400 or 1500. I have an E7 250hp maxidyne that is governed at 1750. I have always wanted to send the pump out to get worked over to 300hp specs and the governor set to 2100 just have not got around to it yet. My service book shows the same part numbers for the turbo and injectors for EM7-250, EM7-275, and EM7-300 so to me the only difference is in the pump. Would make drivability with the T2070 trans a little nicer I think.

But as far as how the truck is running. You are pretty much exactly describing how an old Mack with these specs typically runs. Run it out the the rev limiter and catch the next gear at 1100-1200 rpm. Then slowly pull up to the rev limiter again.

The T2090 has a 0.71 overdrive. Pretty much any Eaton 13 you will lay hands on has a 0.73 overdrive, which is very insignificantly slower so the overdrive point is moot. The real crux of the issue is the packaging and fitment of the Eaton into your truck. It is not a direct bolt-in process. The crossmembers are different. Also, the clutch linkage and driveshaft lengths are all different. There are probably other things I'm not thinking of that you would need to work out too. Maybe a Mack T2013 13 speed would bolt in easily and you would only have to modify driveline length? Plus you would retain the same 0.71 overdrive.....

What is the best option for a replacement clutch for durability / price? I paid to have one put between a Series 60 Detroit and a Eaton Super 10 transmission a while back but can't recall what the shop sold me. Is there a major price difference between certain brands and/or does one hold up better than another?

The more I research this the more and more I think these Rolls powered Internationals were Canadian manufactured only. The one in the video was manufactured at International's Hamilton Ontario plant. I can't find any information that these were installed in American made trucks....

International had them as an an option but apparently they were rarer than hens teeth, and of those essentially all were repowered with domestic made engines......

The same question was asked in July of last year. See below link to that thread. Seems @Red Horse may know him and/or his whereabouts..... At least it sounds like he is OK just busy.

I guess it could be two things: 1. Compressor governor is not cutting in. The compressor is gear driven so its turning so long as the engine is running but in this case not actually compressing air. 2. There is a catastrophic failure of the compressor discharge line causing zero air to enter the air tanks. I guess I would inspect the discharge line from the compressor all the way to the wet tank with the engine running and see if I could find a leak. If no leaks are found then go after the compressor governor...

Yea I think that truck is in amazing shape from what I could see in the pictures. There may be some rot on the cab we can't see but everything else looks rust / rot free. I like the short wheelbase.

Looks like $18,500.......22,000-3500. Seems about right to me from what I have seen anyway. Anytime one of these pops up on Marketplace they are mid teens to twenty some thousand bucks depending on condition. This one here looks very tidy.

https://jacquierauctions.hibid.com/catalog/368180/estate-of-star-farm-online-auction/

I also see them for sale on Marketplace all the time but they are usually in the teens or low 20s moneywise.....

There is one currently for sale here on the forum buts its hidden in an extremely old for sale thread for a low boy. Seller is @MHfred here on the forum. See link below and go to last page. Real nice looking single axle MH: