Shifting a ten speed

Have you tried going up/down on the rpm range at all? We have 75 of the same trucks at work and I swear they all shift well at different points.

 

Your rushing it.

Take that truck up to 1650 or a little more. Clutch in, and knock her out of gear. Wait a heartbeat, add clutch again and your next gear RPM should be reached already and waiting for you to finish the shift up.

When you grind, your transmission is either spinning too fast or the road speed etc is simply not a match to the engine.

All manual trucks have one RPM you shift up at and one RPM you must down shift at to avoid lugging.

Those to numbers you hit everytime. Forget the floating etc. And don't depress your clutch too deep and hit the brake and slow the transmission too much. You would have to attempt either a return to your previous gear or the one below it as your rig begins to slow if flat or upgrade and pickup speed downgrade. Which requires you to go up one or more to match the transmission.

Transmission is non syncro. You ARE the syncro. It will do it at two particular RPM more or less up and down. Anything else is just a workaround.

Grinding is like mature profanity from a baby. You accomplish nothing. Stop it. It's NOT BAD... but that truck is saying ow, stop that.

 

The sweet spot is roughly 400 rpm lower as you shift higher.

 

Agreed many engines shift in a range of 400

This excludes the older engines from say the 60's or 70's those used to shift say 2100 out of 2300 down to about 1800 and pull. If dropped below 1500 the whole rig might as well just roll over and die.

Todays rigs can be shifted two ways. Im not going to try to get into it. It concerns at what point you shift up so that you literally walk away from anyone without burning much fuel or revving drama. You will get all that someday.

 

There is nothing to teach yourself sir. Just allow the engine and truck to correct you with bad noises when you are doing it wrong.

Stop, take a minute, walk around get back in and fire it up. First gear. Second gear. work your way up the tree. You know when you get into a hurry inside you are going to scratch it. Don't you will be driving for weeks or months, aint no hurry.

 

A short story, 1973 international school truck on 695. Car cut me off a little bit I hit brake, she lugs then noses down at about 45 traffic is unhappy. I try to down shift too slow for next one down, she ground.

I sit there and stand on the shift GRINNNNNNND Instructor had to collect himself there for a minute. I finally just stirred the box in high range GRRRRIIINNNNNNNNNNNNNNNNNNNNNNNNNNNNNNND 30 now....

GLUNK Found a gear. Engine was way on the rev max RPM. Traffic was clearing a path. Trucks gone nutty, get out of here... Espeically when plastered with STUDENT all around... Ugh.

Instructor told me oh &^%$ dont you go pull it over here.

What had happened was I pushed the shift range down by mistake and got into what i thought was 5th high. but it's first. Had the clutch come out...

heh... she will do her best to roll onto her roof ...

oh the shame.

In every training situation there is always one student who will downshift at any cost. It must down shift one gear. SO he bends forwards pressure on the stick GRINNNNNNNNNNNNNNNNND and revving the engine up and down trying to find that little no grind to get it. But the road speed had dropped too much poor thing did not understand the overall situation. But he tried his very best to grind that transmission to a pile of shavings.

To this day I have never seen a truly destroyed transmission. Those things are really tough.

 

when you are about to change gears and you feel like it wont shift, press the gas lightly to rev up the rpm and it should shift. If for some reason you still having trouble apply clutch. It takes time to get the tractor to float smoothly dont stress it.

Good luck.

 

I can answer the shifting problem because I had some training. That was just a little poke at no training. You could get in bad spot on big hills out west or in the snow.

To shift 1-5 gear is pretty simple to fix and no grinding gears. The trick is to shift at 1,000 RPMs or less. Like 800 or 900. Because at that low RPM you DON'T have to match the gears. The truck has enough power to pull at 800 or 900 or 1,000 RPM to get rolling. You DON'T need all the power the engine has in the low gears.

So you start it in First gear bring it up to 1,000 RPMs then shift to second. It will go in gear because of the low RPMs. You will go through 1-5 gears just to get rolling half way through stop light. That's how fast you will go thru the gears.

When you get ready to switch to high rang like gear 6-10 bring engine up to 1,600 RPMs. Because you now need the power to pull the next gear. Their is usually 400 RPM step between gears. So 1,600-400 is 1,200 RPMs. The truck should go in gear at 1,200 RPM and that also the most pulling power. So put in gear let the clutch out and step on the pedal and let it pull.

If you miss that gear then go to nextt lower gear 1,200-400 is 800 RPMs that's when it should go in next lower gear.
800 just happens to about the lowest RPM it can still pull.