Freightrain

I didn't take mine below 1500. Maybe 1400 if I was easing off the throttle before downshifting.

I couldn't take the green paint on the transmission so it is now black. Much better! I checked clutch brake adjustment and clutch height was setting really close already. To help with building the linkage I used a bar on the clutch fork arm and measured 23* of travel from freeplay to clutch brake application. I can use that information to work on the new linkage and make sure I have enough travel in everything. I received my cooler block off plate and have it installed. I also re clocked the air starter. The inlet was on the bottom because it was on lower passenger side on 237. Now it is flipped on the drivers side. I didn't like the exhaust on the top so I pulled it off the engine and rotated the body 180*. Now if it drools it won't make a mess. Also, WTF, you have to remove the rear oil filter to get a starter changed out on these engine. PITA. I liked my passenger side starter. Yesterday I took 1/2 day vacation so I could go buy some material at steel supplier to make up the lifting cradle. I will be working on that this weekend so I can make plans to get motor set in the truck. I finally got the correct steering knuckle parts, so I welded the old holes shut, painted and installed the steering box. I was playing hell trying to hold this heavy bastard and start the bolts. I gave up and turned the front bolt into a stud. Now I could slip it in the hole and start the nut and then stand on the out of frame and wiggle the other bolts in the holes. The joint comes up right about the same spot as the original column did in the floor. I started measuring the old input shaft on the old box to see where I need to cut and start to fab up everything. Should go relatively smooth. 😆

My 237 worked well with Triplex. It could pull down, but seemed better with tighter splits available. Granted I am not pulling 80k lbs. My 300+ had a 5 spd behind it. I know the transmission was original to the truck but not sure the engine was. I bet it was a dog with only 5 gears.

Late to the party.... Congrats on new job. Hope it brings you happiness. I want to change jobs after 40 yrs here but I will loose a bunch of perks that I don't want to loose, yet.

I looked online and it basically looks like the same basic set up as a car transmission has. Cone shaped engagement. It is the friction material that makes or breaks the engagement depending on what fluid is used. Just like I mentioned in the post above. They use material that works well with lighter fluids today compared to the 60-70s. Newer car transmissions can't use thick gear lube due to small roller bearings and the clearances they work with. The old loose fittings gears allowed thick gear oil. This falls in the same kind of category.

Just my .02 worth of knowledge and synchros (in car transmissions). The old brass blocker rings worked better with mineral oil. Synthetic was too slippery and it would rake gears. Most new automotive transmissions use a version of ATF and with fiber blocker rings it shifts fine. I don't know what Eaton uses for synchros today? I think the old boxes were brass when it used mineral oil. I agree with not mixing fluids. I take that as using 1/2 syn and 1/2 mineral persay. Topping it off with one while it still has something else in it. Mine is very dry right now so there would not be any "mixing" of fluids

I thought I saw specs that say it was okay to use. I also understand that changing now would likely not be a good idea. But, the fact that this transmission was never shifted would alter that fact slightly. The discs are still permeated with synthetic oil. So I guess I will change my bucket out.

Wonderful. Guess I will return this bucket and get synthetic. Ugh. I hate paying for that crap.

No.

Thanks for that!

Remove the AN fittings and the plate has o rings to seal it? I don't think it would be good to dead head the pump? Or does the plate allow bypass?

Some progress today: And then.... Tadaaaa. I picked up a 5 gal pail of 50w gear oil for the transmission. I need to plug off the cooler fittings before filling as I don't know if that won't just puke everything back out. I am going to just loop the two lines for current operation. I don't think I need a cooler. Maybe I will look into a small alum cooler and mount on the frame down in the air just for the shitzandgiggles of it. I received the steering column yoke and.....it was packaged wrong and is not correct. The eBay seller promptly refunded my money. I got lucky and found one in a truck parts warehouse in Tn and should see it early next week. Once that fits, I can get box mounted and work towards getting it connected to the column. I am feeling good today.

Not sure how old of truck you are looking at but the old two stick 6 spd is popular. Real deep under 1st for crawling but a decent OD.

Left handed? Really? Wonder why?

They make left handed taps in all sizes(std and metric). My work uses them A LOT due to what we make. If you run into issues, let me know as it may be something I have here at work you can use. They do make left hand heli coils so fixing stripped threads shouldn't be a problem.