Rob

I may need to enlist you guy's help sometime to post a video. I have a 79 4200 International lowboy tractor my uncle gave me about 11 years ago and I've never started it. The hood/grille is right up against a tree precluding it's opening. This truck has a supposedly very good running 6V-92T, (350hp) under that hood and a nine speed behind it. I'm gonna make attempt to get it going over the Memorial day holiday break. I have spare injectors, and governor setting tools so we'll see how it shakes out. This truck will be my "yard horse" if I get it fired off and running well. A video might send nephew Ben over to see his girlfriend for some excitement. I can just imagine how nephew Vin would feel if I was screwing around with a "U" model Mack; but I don't have one of those. Rob

He expressed dissappointment? I never read them, nor watched the video. I'll have to do that later.Uncle Rob

Shit, I though you was being kind.Rob

I have not one, not two, but five uncles and relations that are all retired Teamsters and not one of them will vote for this president's re election. Now I'm too young to remember much about Jimmy Hoffa, but freight, and commodity hauling put a lot of groceries on our table so I'm partial to trucking. I am also very partial that everybody have a fair chance at making a living. This is the primary reason I support deregulation, and recinding government controls on most anything. Next thing on the agenda would be to tie the tree huggers asses to their species of choice because they are strangling everybody with ropes that should be used on them.Rob

Get some time in the saddle before you start thinking of changing. That duplex is a fine transmission and if a 72 series, "hell for stout" in the application it's in now.Rob

Hi Carl, this sounds like gearset wear to me. Overdriven transmissions are always hard on that gearset no matter the horsepower or torque rating of the engine. You might try to wrap the transmission in a blanket to see if the noise is attenuated. Don't do this long as the heat will not be rejected from the operation. This is only an isolation method. Another source of noise is slip/spline wear in the driveshafts. This can usually be attenuated by greasing heavily and test driving although it always returns. Rob

I have seen driveline noise propagate through the driveshafts and bearings. There is actually a product that "foams" the inside of a driveshaft that is very effective. This usually cancels out "ringing" that is sometimes heard under acceleration when loaded.Many manual transmissions of yesteryear use gearsets based on the 14 degree contact pressure angle. These are very strong in application but noisy in operation. This is part of the whine you hear from drivelines. Heavier weight gear oil is usually the solution for this. Rob

That or they fancy silk.Rob

I was just thinking of expanding into the transportation industry too. Well shucks. Guess I'll just have to expand my packaging operations.......Rob

I just hope he keeps the rubber on the road with that truck........Rob

It probably started as a 350 block. Engines can be built to whatever. The pump and governor settings are what controll this. There are variations to the base engines to allow them to withstand the higher stresses of higher calibration setting and therfore horsepower, but one can't be certain of what is what unless the truck is dyno'd.I would think a 350 block derated to 250 would last a good long time with decent routine maintenance. Rob

I'm just babbling myself. Hope somebody is smart enough to figger it out.Rob

They really don't have to match as far as tread design. They do need to be round with no flat spots, (as in skidded) or out of round. They must be the same in diameter on all four corners.Rob

It is predominantly those numbers from the injection pump tag, and the governor tag you will need to work with. For the most part torque and horsepower curves are generated by these parts and their calibration(s).The absolute best thing to do is go to a truck shop and have them chain it down and dynomometer the truck for horsepower and torque curves. Install a pyrometer prior so you can watch one of the most important things, (exhaust temperature) so you don't melt things. With a competent shop doing the work this will be no worry as they will use external equipment fitted to your engine. I know you are dealing with a hodge podge of parts put together. Rob

Suppose that would be me eh? Rob

That state is pretty much lopsided to the left also. Uncle Rob

I'm down on supplies right now. With all those political passengers riding on taxpayer's expense we depleted the nationwide supplies of rubber gloves as we certainly didn't want to "catch something". We are currently negotiating with "Trojan Man" for an emergency fullfillment order. If this is an emergency, we do have an allocated stash that is made in China we could use on you, I suppose. I'll keep you posted. Rob

Has anyone ran "chase" with you yet at the speed in question? It may jarr your teeth to maintain a speed that is shaking the truck apart but a lot can be learned with somebody actually watching the driveline and tires from outside as the vehicle is operated.The drive tires really do need to be within 1/2" diameter of each other on the rears to not induce problems and if yours are different in height by much, they need changed. I never really put a lot of thought to it until your photo of the axle chained up. I was thinking since you replaced them, they all matched. Rob

Oh that's a relief. I was afraid it was a chunk of "outta cheeze" lodged in there.Rob

You can pull the rear cover but not the top. It is always easier if the trans is out of the truck.Rob

I can't reason that this would do any good on mechanical parts involved. The inter axle power divider would be 100% slipping all the time and this would seemingly rapidly cause wear to the cam and plungers from this slippage. I may be incorrect but it sure seems this thing is going to try to keep the differentials together.Rob

I wouldn't purchase that cab sight unseen. The description of starting to show some rust is considerably worse in the structure.Rob

I've never had/purchased cable television. Kids hated me for it but they came out alright. I watch most things on You Tube.Uncle Rob

That makes sense. Your spring brakes are on the rear drive?Rob

I don't think it was a dumbass idea but am surprised it worked. I would have thought the torque bias would have been routed to the axle that is off the ground causing it to spin. Of course with you not hammering the throttle there was probably enough preload to not let it slip. I'll bet if you would have asked for hard acceleration it would have been really loud as the peanuts started skipping from the slip of breakover torque.Rob