Now to get to reverse and low, there's a bit of a wall here. How students see a 13- or 18-speed transmission shift pattern on first encounter. The only time you're going to use low is if you're starting off with a really heavy load - a set of super B's at a hundred forty thousand pounds or sixty three thousand five hundred kilograms, or you're pulling out of a loading dock, or just need to go slow, hooking up to trailers and those types of things where you need a bit of control.Īnd you use low gear or you're starting off on a really steep grade and you're just trying to get the truck going.īut for the most part you're just going to use first gear. Now the first part of a non-synchromesh transmission is the shifting pattern: reverse, low sometimes, called bull - 1,2,3,4.įirst, second, third and fourth - and what confuses students or causes challenges for students is that yes it is a basic 5-speed pattern, but you drive it like a four speed - 1,2,3,4. I will cover some of the other transmissions, but for the most part 13- & 18-speed transmissions.
13 SPEED SHIFT PATTERN HOW TO
This is for drivers going to driving school and learning how to drive a big truck.Īnd this particularly is directed towards 13- and 18-speed transmissions. Rick with Smart Drive Test talking to you today about shifting theory for a non-synchromesh transmission. So today, we're going to talk to you about shifting a non-synchromesh transmission and the theory behind it. Those three things have to match or it's not going to go into gear. It is the driver's job to synchronize the transmission. You don't want to let the clutch out, but it'll go back into first.Ī non- synchromesh transmission on a big truck you can take that stick out of high gear and try to put it back into first gear.you'll break the stick off before it goes back into first gear.
13 SPEED SHIFT PATTERN MANUAL
In your car or light truck a manual transmission is a synchromesh transmission, which essentially speaking or simplistically speaking means that you could go down the road at 100 kilometers an hour, take it out of fifth gear stick it back into first and it'll go into first. Rick with Smart Drive Test talking to you today about shifting theory for non-synchromesh transmissions. You got to slow the vehicle down - bring the RPM all the way down to a thousand to downshift. It's different than normal cars and light trucks. The last piece for non-synchromesh transmission: when you're down shifting, slow down to gear down. Don't ride the clutch on any vehicle! Downshifting Therefore you have to adjust the other two variables to compensate for that.Īnd again the last piece: and this goes for any manual transmission, not just a non-synchromesh - don't ride the clutch.Īs soon as you finish shifting the gear, get your foot off that clutch.
To Shift a Non-Synchromesh Transmission you have to match the engine speed, the road speed, and the gear.Īnd as well, geography is going to start having an impact on your shifting because downhill-uphill is going to affect the road speed. One of the other things that you have to do as well is you have to double-clutch: once into neutral another clutch into gear - ba dump, ba dump, ba dump, ba dump. When you engage the clutch brake you to slow the gears down in the transmission and you're going to get a rough shift. Top of it's the freeplay, the friction point, the dead space and then the clutch brake.Ĭlutch brake has to be engaged only for starting gears - 1st & reverse.Īfter that you only push the clutch in 1-inch because if you push it farther than one inch you start to engage the clutch brake. The clutch is very different than that you're going to find on a car or light truck. Red is 13-speed, blue is 15, grey is 18-speed. If you're going from fifth to fourth, push it down before you come out of fifth and it'll shift as you go through neutral. You're going from 4th to 5th, pull it up, andf shift to fifth. The only time you use the range selector is between fourth and fifth. What allows a 5-speed transmission to become a 10-speed transmission is the range selector. Modern Diesel Engines Demand Progressive Shiftingĭouble Clutch When Learning to Drive a Big Truckĭriving a Big Truck is NOT a Spectator SportĪll transmissions are basic 5-speed patterns. "A Crash Box" or Non-Synchromesh Transmission How to Shift a 9, 10, 13, 15 or 18-Speed Transmission | Truck Driving Driving a non-synchromesh transmission is complicated.
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