Hey folks
Got a question about gear recovery speeds. I will be starting my second week of CDL school next week, yesterday our instructor gave us some homework to do. In the homework is a couple of pages of nothing but 'road speeds', our instructions are to fill in what gear we need to shift into if we miss a shift. Below is the recovery speeds that our instructor gave us as well as some advice from a friend. The only thing that I am not clear with, say for instance I missed a shift running between 35 and 40 mph, what would be the right gear to shift into? I kind of like the advice that my buddy gave me, it seems a lot easier to remember that way.
Instructor
4th= 8mph
5th= 10mph
6th= 15mph
7th= 20mph
8th= 25mph
9th= 35mph
10th= 45mph
This is my buddies advice;
1+0 (10mph)= 5th gear
1+5 (15mph)= 6th gear
2+5 (25mph)= 7th gear
3+5 (35mph)= 8th gear
4+5 (45mph)= 9th gear
Gear Recovery
Discussion in 'Questions From New Drivers' started by Hip Hugger, Jul 12, 2014.
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Your buddy has it right, as this is the way I was taught in school. It works every time but honestly, I never use it. And I bet you won't either once you are in your truck. You'll likely go by the sound of the engine and your perceived road speed. . When you've missed, it's really not a time to do even the simplest of math equations lol!
Pmracing Thanks this. -
I kind of figured I would never use this outside of school, just like double clutching. But if a gear was missed running between 35 and 40 mph, would you go into 8th or 9th? I am guessing 8th
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35mph-- 3+5=8th gear
36mph-- 3+6=9th gear
37mph-- 3+7=10th gear
38mph-- 3+8=11th gear
39mph-- 3+9=12th gear
40mph-- 4+0=4th gear
According to your buddy...... -
Omg. That's it, I'm outta' here.
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Does that little chart thing work?
Last edited: Jul 12, 2014
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Those are general guidelines. But it all so depends on differential ratios too. Generally if you missed your upshift, the advice I was always given is to go back the gear you came out of . The best way to learn is to just rack up tens of thousands of miles.
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24(5+2) - pi= gear
Just pay attention to your speedometer in relation to your gears while it's going good. Eventually the visual of movement and what you are doing will give you a good idea of gear selection.
Example: I take turns in 3,4,5 depending on how fast I take them. Then relate that to your road speed when you are lost. Hmmmm, I'm going a little faster than a quick turn so let me try 6th. Don't panic and go crazy on your rpm bumps.
If you missed a shift you know what gear you were trying to go into. But you have lost road speed so attempt to go back in the gear you just left.
This stuff takes practice. You won't look at any chart and learn it overnight.
When all else fails, grind 'em!Skydivedavec Thanks this. -
You're right, but this is one of those things, like Algebra and cursive that you will never use in the real world. You'll miss gears, but you won't know the right recovery gear until you hear it.
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