Need help on doing tug test and clutch

Tug test + Poke your head under
there and visually check that the
latch closed over the kingpin
Use a flashlight since it’s generally
dark underneath

Been a rash of dropped trailers
lately at the yard

Only takes a few seconds to double
check and keep yourself out of trouble

 

When you shift gears from stopped. You shift at 1,000 RPMs or less. Because you won't have to worry about grinding the gears and you don't need a lot of power to get rolling. So you will shift like the first 5 gears just to get moving and thru a intersection. That's the low side of transmission.

Then when you get ready to flip the switch for the high side. You bring the RPMs up to 1,600 and shift. Because you need more power once you're rolling. Then let the RPMs drop to 1,200 and it should go in the next gear. Truck general have 400 RPMs difference between gear. So if you shift at 1,800 RPM then it will go in the next gear at 1,400 RPM or 1,600 RPM then it will go in gear at 1,200

The

 

Truck has massive torque. Heel toe isn’t necessary the clutch alone can bring you up to like 7 or 8 mph if you just shift without even touching the throttle

 

How can you not use the throttle, yet build enough rpm to shift into the next gear?

 

Cause the momentum is enough to keep you from stalling. You can run up 1st through 5th without using the throttle. Try it it’s true

 

So my truck is idling in gear at 600 rpm and I want to shift up to the next gear and the engine stays at 600 rpm, do i just use my foot on the shifter and hope i can kick it hard enough to force it into gear????
You grind a lot of gears i bet?
I might shift as low as 1000 rpm, but not at idle speed.

 

Jwhis is telling the truth. It's how I teach people that have never double clutched before to double clutch.

You use the same rhythm at an idle as you do at speed. It's kind of like some voodoo black magic trick or something

 

No, not voodoo, just basic physics. A truck transmission has an input and an output shaft. As the truck gains speed that output shaft is spinning faster and faster. You change gears to keep those shafts in sync. In fact, this syncing in the basic mechanics of shifting period!

 

I dunno. I'm not seeing it either. With a 400 RPM step between each gear I really do not see how you can pick up gears without dropping the transmission input RPM.

 

As I stated in my last post, stop thinking about the transmission's input shaft and think about the output shaft. Of course, there will be some RPM changes, that's to be expected. However, you can do this without adding throttle and keep the engine safely within its normal operating RPM range. Warning though about this. NEVER start practicing doing this and lugging the engine. Lugging an engine is one of the best ways I know of to do severe internal damage.