Seriously, I drove a 10 speed until it was time to turn that truck in and then they gave me one of those frakenshaker automatics with 12 speeds and everything except eco mode locked down.
It shifts like ####, even when you are loaded to 79980 it starts in first gear and shifts to 4th revving the engine up to 2100rpm. The whole time its skip shifting causing the truck to jump and twist even when you try to start granny slow.
On top of that it uses the jake break to slow the engine down when shifting so the #### thing sounds like a sick dinosaur.
About half of the time you have to manually override it because it will get itself stuck by shifting too high causing the rpm to drop to like 900 or 1000 where the truck has so little power that it actually starts slowing down even with it mashed to the floor.
This thing is a piece of ####.
To rub more salt in your wound, the stupid thing has built in "georgia over-drive" that throws it into nuetral any time you let off the trottle to coast, which is a pain when you are trying to slow down for those speed zones.
Did freightliner intentionally set out to make a crappy automatic transmission?
Discussion in 'Questions From New Drivers' started by ravaughn, May 9, 2017.
Page 1 of 14
-
Dino soar, rabbiporkchop, Canadianhauler21 and 11 others Thank this.
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
I don't think the transmission itself is crappy, it's the eco-mode that screws things up. I'm convinced the economy shift points and engine response were optimized on a dyno in an R&D facility by an engineer that has never had to drive a truck loaded to gross.
They got the nice mpg numbers to hand the sales dept and called it a day.snowlauncher, rabbiporkchop, Oldironfan and 5 others Thank this. -
No- freightliner did nothing intentionally-imo-but
your story sounds like the operation of this truck is Unsafe.And you,as a professional driver,have the Authority to put that bad boy OUT of SERVICE.
Walk in,throw em the keys n say "you drive it-you'll see".
Then,politely ask em for a different truck.Good luck.88228822, NoBigHurry, Oldironfan and 4 others Thank this. -
How do you like it when it tries to start you out in low gear when bobtailing?
Honestly, freightliner couldn't even figure out how to keep rain out of the cab or mount a bumper straight... how can we possibly expect them to make a fool-proof transmission?shanman, jsnell, snowlauncher and 9 others Thank this. -
Not trying to put you down by any means, but everything you describe is what it's supposed to do.
Insofar as the skip shifting, it will do that if you mash down in the accelerator. Ease the pedal and you'll avoid hard shifting.
Keep your Jakes in auto mode (all the way up) and it'll shift smoothly.
I have the same transmission and I love mine. Works great and saves me a ton of fuel.SoulScream84, KANSAS TRANSIT and JReding Thank this. -
FozzyNOK, Oldironfan, Grubby and 12 others Thank this.
-
-
These guys have everything setup for trucks with 40,000ish gvw and expect it to work with a truck at 80000gvw. I actually got better fuel mileage with the 10 speed even though I wasnt trying.
If you get better fuel mileage with the dt12 perhaps you need to watch youtube videos about shifting? Its not like you couldn't do anything the dt12 does on a 10 speed. Especially as slow as the dt12 shifts, I could shift 2 times in the time it takes the dt12 to shift once. Thats part of the reason my fuel mileage hasn't improved actually, with a heavy load you need to shift instantly or else you will cause the truck to slow down during shifting which causes you to burn fuel trying to accelerate back to your original speed.Last edited: May 9, 2017
Oldironfan Thanks this. -
1st off, it's not a race to go thru gears.
2nd, getting 8.57 MPG for the 2nd quarter of this year is nothing to turn one's nose at. Lifetime for my truck is 8.10 with 103K so far. That means the breaking in period is just about over. I fully expect to hit 9 MPG by year's end. That's running 48 states and 75K lbs gross 95% of the time while loaded.
My 10 speed manual Cascsdia got 8.42 MPG lifetime over the course of 396K miles. Both trucks only had 1 driver...me.
As far as the videos, simply search "how to drive DT 12." You'll get dozens of videos from Detroit, Freightliner, and driverssnowlauncher, strollinruss, arrogant steve and 2 others Thank this. -
snowlauncher, Oldironfan, KANSAS TRANSIT and 3 others Thank this.
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
Page 1 of 14