What does he mean by match the RPM to road speed? Gauges in same position (ie both at 11 o'clock) or is there a particular speed for every gear that needs to be memorised?
Neither! It is best to give an example: Say you're accelerating and tach reaches 1800rpm.
If the next gear up at that speed is 1500rpm you clutch, use accelerator to give the engine 1500rpm and then release the clutch at that rpm. Thus there will be no kangaroo jump at the clutch release and accordingly no stress shock for the driveline to handle. Anyone with a stick-shift do this instinctively. With a big-rig it turns important because the forces at play are so big...
ill be honest, i disagree with part of what he says. my dad shifts most gears without using the clutch, and he has gotten full use out of the transmission, no premature failures. his clutch lasts twice as long, he only uses it when downshifting up a hill. the key is not to force the transmission, you use the foot feed, if it starts grinding raise or lower your rpm till it slides in nice. when you slam it, you wreck stuff. im suprised he didnt mention wrecking the clutch break.
@speed150mph don,t disagree because he explain it very well you just was not listening . It can be done but by pro drivers only who don,t grind gear when they don,t used the clutch . I have a friend who owned his own truck an only used clutch to start and stop nothing else not even hills . an never change a clutch in the life of his truck .
@bonehead1603 HE haven't replaced his clutch yet" but if your talking about an tractor trailer truck...hes' gonna be replacing a "Clutch Brake" instead...
@urbex2007 Saving damage would be learning how to shift. Part of truck driving is operating a non-synchronized transmission. The driver needs to have control, and part of that is having a standard shift transmission which allows the driver to select the proper gear based on situation.
because just like the cruise control , an automatic transmission can not see the upcoming hill and only reacts when it's hitting the slope. Nothing beats the human brain.
thanks, this cleared stuff up. Not sure about the non synced gearboxes tho, seems old. And even with a fully synced it's still possible to fuck up. missing gears, clutching too fast... specially when going hi to lo, miss one and you are free wheeling 40 tons. all bad for the tranny no matter what.
@wertyh11 These transmissions do not have any sycros on the main box just the aux transmission, thats why you have to match speeds when you are shifting
I'm about to learn the art of truck driving, so am really worried about all the shift patterns, Hi/Lo and Spitters... This video has cleared up some of the confusion. Thanks.
this is soo cool
remtheoneilo 4 days ago
he is taking shit when he says if you don't use clutch you'll kill the transmission.i do it every day ,no damage at all,thank you 1parre.
pikuda001 2 weeks ago
@pikuda001 He also mentioned DRIVER ABUSE/IMPROPER SHIFTING TECHNIQUES...ur syncronizer is saving that ass..
Soulja1785 6 days ago
Company BS! cover your A** right, company man
dustbowel20 3 weeks ago
My uncle sifted gears without clutch three years, New owner opened transmission and there wasnt any damage!
1Parre 1 month ago
I would be willing to bet that they got those damaged parts from a SWIFT Trucking maintiance shop.
24preacherboy 1 month ago
What does he mean by match the RPM to road speed? Gauges in same position (ie both at 11 o'clock) or is there a particular speed for every gear that needs to be memorised?
edwardzimmerman 4 months ago
@edwardzimmerman:
Neither! It is best to give an example: Say you're accelerating and tach reaches 1800rpm.
If the next gear up at that speed is 1500rpm you clutch, use accelerator to give the engine 1500rpm and then release the clutch at that rpm. Thus there will be no kangaroo jump at the clutch release and accordingly no stress shock for the driveline to handle. Anyone with a stick-shift do this instinctively. With a big-rig it turns important because the forces at play are so big...
elmerexpress 3 months ago
ill be honest, i disagree with part of what he says. my dad shifts most gears without using the clutch, and he has gotten full use out of the transmission, no premature failures. his clutch lasts twice as long, he only uses it when downshifting up a hill. the key is not to force the transmission, you use the foot feed, if it starts grinding raise or lower your rpm till it slides in nice. when you slam it, you wreck stuff. im suprised he didnt mention wrecking the clutch break.
speed150mph 4 months ago
@speed150mph don,t disagree because he explain it very well you just was not listening . It can be done but by pro drivers only who don,t grind gear when they don,t used the clutch . I have a friend who owned his own truck an only used clutch to start and stop nothing else not even hills . an never change a clutch in the life of his truck .
bonehead1603 1 week ago
@bonehead1603 HE haven't replaced his clutch yet" but if your talking about an tractor trailer truck...hes' gonna be replacing a "Clutch Brake" instead...
Soulja1785 6 days ago
Cool tips. Save a lot of money down the road.
transmissionslipping 6 months ago
what is the usual suspect when th o/d stops working on eaton 13 speed?
smellmyfartgas 1 year ago
Why not make it automatic to save damage?
urbex2007 1 year ago
@urbex2007 Saving damage would be learning how to shift. Part of truck driving is operating a non-synchronized transmission. The driver needs to have control, and part of that is having a standard shift transmission which allows the driver to select the proper gear based on situation.
Drive it right, and it will work for many miles.
Fantafare 1 year ago
@Fantafare Oh too true I learned to drive a truck on a 12 Speed Crash Box and Split rear axle and if you made a mistake then you found out real fast.
Take the load off and allow the gear to simply slide into the next with no load ie roll the revs down and the Box will just slot in 'eh
mozzmann 9 months ago
@urbex2007
because just like the cruise control , an automatic transmission can not see the upcoming hill and only reacts when it's hitting the slope. Nothing beats the human brain.
menkeechang 1 year ago
thanks, this cleared stuff up. Not sure about the non synced gearboxes tho, seems old. And even with a fully synced it's still possible to fuck up. missing gears, clutching too fast... specially when going hi to lo, miss one and you are free wheeling 40 tons. all bad for the tranny no matter what.
TaTaPrib 1 year ago
All exept for the doble clutching; this guy is talking about 1940's trannys without sincroni
wertyh11 1 year ago
@wertyh11 These transmissions do not have any sycros on the main box just the aux transmission, thats why you have to match speeds when you are shifting
Thatsallfoks01 1 year ago
Thanks for this video.
I'm about to learn the art of truck driving, so am really worried about all the shift patterns, Hi/Lo and Spitters... This video has cleared up some of the confusion. Thanks.
numloxx 1 year ago
that was very informative... i guess i am guilty of harming a tranny or two or three and i didnt even know it.
smellmyfartgas 1 year ago
go trucker vid
robotjim2003 1 year ago