Why can't American trucks have synchronized transmissions?

yes that is true but if you are a little careful syncros are not problem just shift it little slower and more gentle and if you are use double clutching they can least almost as truck life time

we have 24year old mercedes with zf 16s160 gearbox and still no problems with sincro this is tipper truck it works only in town(1100 000 people and lot of traffic jams) so all time changing gears

torque growth over the years has been tremendous increase for example if we return 15-16year and saw 144 530 with its 2300nm and compare it with today g/r440 with same torque or with r730 with 3500 so it is more than 50% of torque grown, and not every transmission can handle it.


personally i would not like to have it during delivery( single delivery per customer) with construction truck i use mobile phone with my shoulder use hand to hold steering wheel and to shift gears and use other one to find papers to hold map or using my other phone or use navigation and this syncro box allow me to be more focused on driving

but i like engine sound while downshifting unsyncro g-box

and i also do it on syncro it is more healthy for transmission

 

No doubt. I learned how to double-clutch and drive a truck in a firetruck at 16 years old. If I can do it and you can't then you should seriously consider a new line of work.

I've always wondered why I can't get a manual tranny in a four-wheeler without synchros so I didn't need to use the clutch all the time!

 

LOL wtf?

If that is so, why are the 22 series eatons and Spicer boxes used almost exclisivley for HH and Road train work out here?

Face it, euro trucks have to have syncro and ever more increasingly automated manual due to the fact, that like everywhere else, drivers are becoming even more lazy....

 

torque is big problem for transmission for a long time 2700 was top of the end, than 3000, than 3100, than 3150 now 3500

not only lazy but there are some advantages of automated gearbox it is more safety, less strain on drive train , longer service life of some components more comfort, and better fuel economy

personally i dont like automated transmission if something go wrong repair is much expensive also they are not too good for construction truck ( there are special software´s for offroad but it is still not same thing

and usually those automated gearboxes have smaller overwall ratio and i want truck slow in reverse and in 1st gear

 

Funny, I was just wishing the other day that my pickup had a non-synchronized tranny in it, so it would more easily shift without using the clutch and I'd have a better choice of transmissions for hauling cattle and horses.

I guess if you need a synchro tranny or an automatic, you'd probably like to have an automated backing system so you wouldn't have to learn how to do that part of the job, either.

 

yes i would like to have it

i was at even worse places every day

 

Looks like some of the places builders used to ask me to put 66-70ft long loads of roofing iron... LOL.

i dont miss the tight access work.

 

a real truckdriver can shift a (crash box) eaiser and faster than a wanabe driver with a sycro box any day.

 

interesting here is harder and harder to sell used truck with manual transmission

mercedes actros mp3 is equipped serial with powershift 2 automated gearbox and even, also daf in some states , daf and volvo with some package of equipment-very popular ones you get it in package

over 95% of iveco´s have them

scania sell least trucks with automated gearbox because scania owners are mostly OO and their pride often do not allow to them to have automated g box and until 2009 scania opticruise was one of worst solution on market

specifying truck with long diff ratio and automated g-box can save a lot of fuel

and in this case there is more shifting but you dont care about it g box do all work

now 2.59:1 is pretty popular at scania

also scania make some calculation that longer ratio trained driver automated g box additional spoilers can save over 25% of fuel ( comparing to standard avarage truck)

scania runs their own fleet of trucks and they are low liners (95cm high 3foot and 1-2inch) 5th wheel) with mega trailers(almost 10feet of loading height ) ( higher than normal trucks and have lower tires so they should have worst fuel economy

and they do 350000km/year and fuel economy 26L /100km=9mpg loaded with 88000lbs


but this is really interesting to me here almost all cars are manual and more and more trucks are automated ( maybe around 80%)

and in US is opposite....here we look more at profit

for example automatic car is about 2000€ more expensive and you don´t get any advantage except comfort....

but truck you can get automatic from 1700-3500€ and it will be soon returned through fuel and other stuff

personally i have only few times driving automatic car ( 2010 audi a6 3.0tdi 241hp) and it shift really nice you can force it to shift at 4400rpm which really high for diesel and shift fast without any mistakes, but i still dont like it

 

Because you think it's still the worlds best. They have troubles with bearings and gear teeth falling out here behind 630 hp C-18 Cats, and no, it's not the drivers, they have driven decades with Fullers. These days American companies are making crap only, there's nothing good coming out there.