I've been driving about a year and a half, however I have always had an automatic tranny.
I switched over Monday to a 01 International 9 speed. I chose to have this tractor due to my load size ( I haul beer).....but I am having to learn the shifting on my own.
I have got upshifting down pretty much perfect, no grinding or anything, but downshifting is causing me problems. I know its only been 2 days of driving but any pointers would be great.
Basically I have trouble when I am having to slow down to around 10mph or so to turn into places, warehouses etc...I have been told that 6th gear serves sort of as a rescue gear, but even with reving up the RPM's I cant seem to get into gear.
Any pointers?
Thanks in advance!
New to the 9 Speed...downshifting killing me
Discussion in 'Questions From New Drivers' started by D3m3nt3d, Jan 14, 2009.
Page 1 of 4
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
What disturbed me the most here was seeing tranny and beer in the same post... lol j/k
The trick with downshifting is knowing the rpm where your lower gear likes to be hit at. Sometimes you have to tap the accelerator to get the rpm to match right other times you just listen for the right sound and let it fall in. There is both a high RPM and lower RPM shift point as well as what is known as a dead or ghost shift (which is no RPMs or not very many usually only the really low ones when taking off at stop lights etc). Also, with clutching think of the Adams family song particularly the, "dunt-dunt-dunt-dunt-snap-snap," part because that is exactly the same as the rhythm that your clutch likes to pop-out and pop-in at so it helps to have the song do that in your head. On the first snap you come out of gear and on the second go into it. It will at least get you sensitized to how your shifting should go. The RPMs can be different on each various set up and truck, but the clutching rhythm and concept is the same.Another Canadian driver and Baack Thank this. -
When getting ready to downshift, slowdown (break urself if u have to) to 1000 rpm, then start saying to your self outloud : "CLUTCH" (shift to nuetral), "FUEL" (step on the fuel enough to get u bout 1500 rpm), "CLUTCH" (downshift to wanted gear). If u practice saying these 3 steps outloud (CLUTCH, FUEL, CLUTCH) you should pick up downshifting pretty quick..repetion and coordination is all it takes, as u probably already know...Hope this helps, it did for me.
Canadianhauler21 and Another Canadian driver Thank this. -
I appreciate the advice so far! I finally got the upshifting today about perfect - seems it likes to fall it right at 1500 RPMS.
As for the downshifting, since I face alot of stoplights, I dont really have long distances where I have to start downshifting....I more or less face where I just have to break, and then downshift when either turning into a place, or when the light changes to green and im still doing around 10-15mph.
I thought I seen a chart one time that showed you a general idea of what mph each gear should represent...such as
1st 0-5mph
2nd 5-10 mph
So on and so forth? I know it has more to do with rpm's, but I feel like maybe this would help me understand which gear I need to shoot for since I would know how fast I was going.
Again thanks for the helpAnother Canadian driver Thanks this. -
9th gear 45 mph, 8th 35, 7th 25, 6th 15, 5th 10. around 11 rpms could also be an indicator, and rev up to around 15.. Instructor said you can use the method of minus 4. Ex: say you top end at 15rpm in 5th gear. your now in 6th. to down shift back to 5th you have to be within 4 rpms of that top end of 5th which is 12,13,14,or 15 rpms, and each gear accordingly.
just tryin to help.
school boy.Another Canadian driver Thanks this. -
9 Speeds, next to an auto shift is prolly the easiest tranny to drive. Youll get the hang of it.
Another Canadian driver Thanks this. -
Turning into drives in 6th gear... Maybe. Maybe not. Gear selection is the first step. I know this is obvious, but I've done it myself. Tried endlessly to get the gear I thought was right, only to discover it wasn't my timing at all. Usually moving too fast, and picking too high a gear for down shifting. When I tried tapping the brakes to slow way down,and moving down to say 5th, sometimes even 4th... she practically shifted herself.
If you timing and method is sound, it's just a matter of pickin' the right gear ...Another Canadian driver Thanks this. -
When downshifting from 7th at that speed I would try revving it up 800 and going to 5th. 10mph may be too slow for 6th on a 9 speed. Grabbing 2 gears on the downshift always seemed to work best for me at school.
-
next time you're in the yard, hit 6th gear, run it up to 1500 rpms and hold it there, and write down the speed.
next time you want to downshift to 6th, brake down to that speed, shift to neutral, rev it up to 1500, and shift into 6th.
you should really do it for every gear though, and memorize it.Another Canadian driver Thanks this. -
Now THAT is the exact right way to know.Another Canadian driver Thanks this.
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
Page 1 of 4