It is a 2013 Freightliner with a new transmission. I don't know what brand the transmission is.
He has 30 years of driving experience. I asked him why he downshifts at 1100 without revving up the engine. I asked him did you read instructions to do that in the manual for the transmission or the manual for the truck. He said that he downshifts at 1100 without revving up the engine because that is how he has always downshifted through his 30 year career. So if it only works because it is a synchronized transmission, he must have been driving trucking with synchronized transmissions all his life.
Downshifting without revving up the engine?
Discussion in 'Experienced Truckers' Advice' started by expedite_it, Oct 28, 2021.
Page 2 of 10
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
-
As god prefers diesels said.
And being able to float shift helps.God prefers Diesels Thanks this. -
Both ways is called being a good operator. The old timers that I grew up with did it both those ways. It depended on the many different situations you encounter while “pushing a diesel”. Back in the days of no mufflers Ed’s way would be done during times when you were trying to keep your smoke and noise down. I.e Late at night passed residence’s or places where you don’t want to be a loud sob.
Ed is most likely just using more brake to slow truck down with that style.Rideandrepair, Midwest Trucker and God prefers Diesels Thank this. -
Still can’t wrap my head around the fact that if you are in 10th at 45mp rpm’s at approximately 1100 you downshift to 9, you need rpm at approximately 1500.
unless double clutching and you drop it in 9th and the rpm rises naturally?
That’s the part I don’t understand is the rpm either will rise naturally or you need to raise it to prevent a hard strain on the drive train no?Rideandrepair, Last Call, flightwatch and 1 other person Thank this. -
Its very simple. for most trucks there is a 400 rpm drop between gears. so you need 400 rpm rise. split shifting with 18 you have a 200Geekonthestreet, mitmaks, Eldiablo and 5 others Thank this. -
The old guy that I saw do it always seemed the that the shifts were done at a much lower rpm than than one would normally downshift... Like maybe shifting at around 1000 rpm, in an old corn binder that I would downshift at like 1600. And it was never a very quick shift either... Maybe the transmission had alot of wear or slop... IDK. I've never been able to replicate it at anything above an idle.expedite_it, gentleroger, Don379 and 1 other person Thank this. -
gentleroger, Midwest Trucker, Isafarmboy and 2 others Thank this.
-
Ed doesn't have a synchronized transmission.
Even if Ed is double clutching you still have to match rpm to road speed to gears.
Ed is most likely pulling it out of gear and then braking to slow road speed to match next lower gear. Ed isn't driving efficiently. Ed isn't using engine braking. Don't be like Ed.
What Ed is doing is pointless. Yeah you can pull it out of fear and coast and brake and then let it slip into the next gear but if you are slowing to stop you will have to pull it right back out of that gear and down to the next.
I skip gears while down shifting all the time, but to do so you have to increase your engine speed a lot. But you get better engine braking that way, with or without the Jake brake. -
Bean Jr. and Cattleman84 Thank this.
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
Page 2 of 10