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...
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?
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.
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.
Company BS! cover your A** right, company man
dustbowel20 1 day ago
My uncle sifted gears without clutch three years, New owner opened transmission and there wasnt any damage!
1Parre 1 week ago
I would be willing to bet that they got those damaged parts from a SWIFT Trucking maintiance shop.
24preacherboy 3 weeks 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
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 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 3 months ago
Cool tips. Save a lot of money down the road.
transmissionslipping 5 months 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 8 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
what is the usual suspect when th o/d stops working on eaton 13 speed?
smellmyfartgas 1 year ago