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Yes, post some pictures, I have a 1958 H Model that I parted out if you need something that you can’t find.

That would be a cool set up. Seen a few for sale but a bit pricey and not sure about rebuilding cost? Availability?

My 300+ has the flip flop linkage going to the pump so it can push instead of pull. A new local FB friend pulls using a 285/300 and removes the intercooler in an R model. Apparently this pump is " the pump" to run . He turns it like 3000+ rpm, all stock bottom end. Says it is no problem.

I can remember when the 285 horse was king! Terry

Spicer's sales pitch was "0 to top speed with only 5 stick movements". 14,16, or 20 possible selections.

The 300+ needs more gearing. Like a Thermodyne. The truck had a 5 spd, but I bet it was a real PITA around town. But it was a fleet truck, so I assume that is why they used a 5 spd.

I used to think that same thing until I got a truck with a Mack 6 speed (twin stick). You somehow are always in the right gear and have plenty of power without doing as much shifting. Biggest problem is at 2,000rpm doing 60, 45mph at 1600 is just right but I don't do much highway driving.

Where you have to be careful is in the lower gears, that applies to any transmission, it the higher ranges it isn't going to damage something as easily. I would shy away from double overdrives, with the one exception of the RTLO's. 1st there is too much wasted in gearing up and back down, all that goes into heat. 2nd there is the driveshaft issue, have to do the math and make sure you are staying away from critical speed at all and 1/2 true critical at cruise. The RTLO's are really a single overdrive front box with an underdrive splitter, where one stick position down is direct, and top gear is something like .76??? in the front, and when the splitter is in 12th is something like .86. Not a true "double over" where there are two gearsets over driveing the input to a faster output. It is all in how it is plumbed in the trans that makes it seamless, kind of like when the went to the Xbar top cover on the RTO's you can't tell by the shift pattern if it is an RTO or an RT

OK! l was stuck thinking of consumable food/feed for humans or live stock. Forgot you have to fertilize it before you can call it food/feed. Thank you Brocky and Paul.

I wonder if Eaton has a bell housing for the FRO to fit his engine?

In my book a 15 is a 12 anyway, and it is a transmission looking for a reason to be. I can see why fleets would spec them as it are a little more "idiot proof" than a 13 or 18. For me if I need the deep bottom end, I would choose 2 spd axles over an 18. 18 has the 15 beat any way you look at it, but in the wrong hands can get expensive quick I have a RTO 14615 in the Marmon, and the only reason it is still there is I retired before I could swap it out. Run what you came with until you have the money and time to change, but when you make the change, make it for the best possible spec's for how you are going to use it, or save your money. Just because it may be slightly better is not reason to jump from one compromise to another. The difference in cost when buying a 10 vs. a 13 or 18 on the used market is going to be a few hundred, but you still have all the costs of the bell, mounts and clutch over what you have now. I would sit tight with what I had and wait until the ideal set-up can be had. Do the Math! crunch all the numbers, startability, top speed, cruising speed RPM, jumps between gears etc.

I'm not overly worried about a deep low. Like my deep under 6041 just for the slow truck race. Beyond that I don't "need" it. I know I am dealing odd pieces and trying to get something that works well together. Decent splits and something like the double OD I have using my Triplex and 6041. Gets me 65 mph at 1500ish. Much quieter then 1800! I don't like lugging it much with that 6041 and the 300 will be harder on it. I wouldn't kick a 18 to the curb if I found one reasonable, even it it means paying full core for it? If there is a DO version that would be a plus. I have the Eaton chart saved, need to look around. I need at least a single OD, period. I will remove the 6041no matter. As for clutch housing, Geoff and I were already poking around at those before I rebuilt the Triplex. Using the Triplex? I could, but I don't want to have to "baby it". If I feel the need to let it rip, I want a transmission that will not flinch. Just a note, I purchased a new $10k transmission for my race car. It is the top of the line, badass, never have to worry kind of transmission. I have no problem with doing that for the Mack. I only want to do this once. Thanks for all the input guys. It will come together somehow.

15 over was popular back in the '80s in tractors. Older trucks might have a direct 15 . Like back closer to the early '70s. ( a ten speed with deep reduction ) They could have been either directs or overs. I think the last ones went up to 15-7s. I mentioned it cause I drove a 300 with one behind it. Even though it was a Maxidyne it still worked pretty good, and was nice for slowing down the truck with the engine brake. After some thought, I think an FRO ten speed might b worth looking into for Larry. ( low 1st gear and fast over gear )They're cheap and lots of CHs used them. I doubt the clutch housing is gonna be bolt for bolt though.

Ive only seen a few 15 overs, and am not a guru. The last one was 5 years ago in an 87 Superliner with 4.42 rears and an E-9 500. I drove it a few times and it pulled good, but, i was just test driving it while i was working on the restoration of it. It certainly would keep up at high speeds. Anyway, just my 1 cents of knowledge..

15s went away because axles got so much faster. (basically) That was the beginning of the end for so many of those once popular transmissions. Super 10 ? Technology outpaced them before they ever came close to catching on. Everything gets outdated at some point I guess

Yes Vlad. I believe I speak for many here, no need to explain your grammer . Not difficult understanding your point or what you're telling us . Your efforts are very much appreciated. Always interesting posts too.

I'll second what Brocky said You do some amazing things and have some fantastic adventures that we are lucky enough that you share these with us all Thank you Paul

I’m no truck driver just a dumb wrench turner ! But in my humble opinion the more gears the better! 18 sp fuller would be my choice ! Note modern easy to get parts lots of selection for almost any horse power! just my opinion!

Vlad, You are doing great!!!! For being a native Russian your English is better than some of us... I wish to Thank You for all the travel and build topics you have posted..

I was thinking about the u-joints as well.. a little bit of slop goes a long way

Thats a pretty vague description if the issue. Do you pull the shift tower off the trans, or in the cab?

So a couple of answers I don't think it matters at all if your to top gear in reverse So backing a dog trailer (thats what we call them out here) is pretty common, backing two dogs is a challenge Apparently plenty of farmers in north America do this with hay trailers I can back two dogs, I can back a semi with a dog Am I competent ? Well yes but not as good as some a possible better than others I have certainly see blokes back road trains that are pretty good, I lack depth perception, dunno if I always have but certainly in the last 30 years or so I have little depth perception over 10 feet away, backing a road train with 80 feet behind me requires not so much correction but checking more often than most Placarded loads can be lot's of different things, even fertilizer I guess like urea can be, nitroprill would I imagine be a placard load Paul

Rick, from that short description it sound like worn forks or the small forks at the bottom of the shift lever are worn and jump out???? Next time you pull the tower take some good pictures of all of the above.. I had a 1959 Diamond T 921 Cab over that they told me would not go into reverse, turned out to be just an universal joint in the linkage.. I am sure some one here can help you better.

Hippy, Bulk Fertilizer!!!! Which can be considered an oxidizer or corrosive....

I often wonder if people who believe in all the illegal migrants and redistribution of wealth they desire is well within their own reach. There's really nothing stopping them from giving their money and home to someone if that's what they really want to do. I get confused when they carry on like it's everyone else's civil duty to do the same. Something is very wrong when justice is dealt out for a turcking violation within a few days, but be here illegally and it's a minimum of months before anything can be done ? Let's make laws.....ignore. Brilliant !!!!