Construction and other equipment - International Road tractor 7 speed

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International Road tractor 7 speed

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=65902
Printed Date: 26 Jun 2025 at 12:15pm
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Topic: International Road tractor 7 speed

Posted By: Randy(Mo)
Subject: International Road tractor 7 speed
Date Posted: 25 Feb 2013 at 8:56am

Is it just the nature of a 7 speed (not a 6+1) to shift hard without scratching gears. Practice helps, or can you do anything to help the problem, lighter or heavier oil, tightning up anything? Clutch is adjusted right because stopped you can use any gear and no noise. Anybody with experience throw in a few thoughts. Thanks

Replies:

Posted By: DMiller
Date Posted: 25 Feb 2013 at 10:58am

Practice is all I can suggest. What model truck cab, and is it a Spicer straight seven? Truck from Hogan Leasing(Would be blue paint with a white stripe) ?

If it is a non-synchro seven or even a Fuller 10 it is shifted without the clutch, start off from a stop and have the clutch fully out, put left foot on the floor and shift by throttle.

Posted By: Coke-in-MN
Date Posted: 25 Feb 2013 at 12:14pm

Hmm - have a 610 would be willing to part with /

Find going up in a 10 or 13 is fine without the clutch - if you time shift to RPM - and use throttle right - going down find the clutch works best many times if moving the stick and not just the selector.

Now my old 5 x 4 well double clutch is only way - or there is all kinds of noise and rattle

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: Randy(Mo)
Date Posted: 25 Feb 2013 at 12:59pm

It was a Coke delivery truck that pulled a trailer single axle,(S1900) the guy told me it was a in town delivery truck that it was governed down not to run aver 60, but thats OK

Posted By: DMiller
Date Posted: 25 Feb 2013 at 7:44pm

You will need some practice with it, the seven is wider than a ten or thirteen between gears and just about the time you think you have it mastered you will miss the point a time or two. Big heavy gearbox, goes almost rail to rail under the truck but are genuinely bullet proof as to wearing out or blowing apart.

Hey Coke, I had two instances with 5x4 and 4x4 trannies where they would not respond save for double clutching, most times just easing in and off the throttle does just fine. The old three position 13 speed knobs were tough to get used to, then they adopted the two position with a ten speed toggle, that was a little easier. Worst unit I drove was a spicer 4x4 air shift in a Diamond, rotten mother slammed every shift, awkward knob and hard to use four speed. My preference above all, Eaton three speed rear ends, always a challenge to learn how to use but quiet and effective as well cheap.

Posted By: B26240
Date Posted: 01 Mar 2013 at 7:24am

My favorite was the Spicer 9 speed, in my opinion a very good local work truck transmition maybe not the best for long haul highway use with long uphill pulls. It was in a Mack with a 300.

Posted By: Dipstick In
Date Posted: 01 Mar 2013 at 8:57am

It's been an easy twenty years since I drove a seven speed, but if I remember right, it took a little more time between shifts to clear the gears. That was hard for the boys to do when they had started on Eaton gear boxes, but I learned on the old time stuff. And DMiller, you are exactly right that thee Eaton 3 speeds were the best transmission, but the power dividers sure took a beating and required frequent re-builds!

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You don't really have to be smart if you know who is!

Posted By: KGood
Date Posted: 01 Mar 2013 at 9:26am

I learned on a 73 pete with 13 speed and the guy only used the clutch to take off. Since I was taught that way I guess I drive them all that way if I can. I have been around the guys that do the double step on the peddle every gear. I'd rather not.

Posted By: DMiller
Date Posted: 01 Mar 2013 at 4:07pm

My first teach in a Freightliner Cabover on how to drive a 13 behind a 8V71T 350 HP setup was inclusive of a 42" "Yardstick", the old mechanic that taught me would whop me one if my foot even so much as headed for the clutch at speed!! I remember I learned quite quickly too! Hardest engine/trans set up I ever drove was a Mack Triplex, three shifter set up, was a narrow point of time you used both hands, a slight hit of double clutch and a prayer to get from low side box high gear into the main in 1st. and the aux boxes in 3rd/and 3rd, Never knew why they had so many available gears in those big buggers but you had unlimited expanse of side shifts for best pulling, came in a B611 sleeper conventional cab set, 210HP Thermodyne.

Posted By: Coke-in-MN
Date Posted: 02 Mar 2013 at 2:17am

in the quad dump went from RT 613 to RTO 613 , it puts 12 and 13 in opposite position now,kind of little getting use to,

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."