Transmission Question

I'm in a 2018 international automatic and its shifting is bugging me. I don't know if it is normal for an International to not want to shift until it hits 1500 rpm. This is a problem on roads where speeds are 35, 45, 55. The stubborn thing wont shift into a higher gear at these speeds. It just sits around 1400rpm and guzzles my fuel. I have to accelerate a couple miles an hour above those speeds before it will shift, then bring it down to the speed limit. Very annoying! Also when I resume the cruise at 58mph it sometimes wont shift into 10th unless I turn the cruise control off.

In contrast, the Freightliners seem perfectly happy to shift at 1200rpm if you let up even a little bit on the accelerator.

Is this just the way Internationals are or is there a problem with the transmission?

RD, what does it do if you use manual mode?????

A lot of the parameters are set at the factory by what the company requested, but all trucks can be different. Talk to some boss in the shop at a terminal. Not a parts changer, but someone that actually knows something for a fact. What about manual mode? Is that an option? When I have had an auto, I always tried to shift between 1100 and 1250, depending on the speed.

RD, what does it do if you use manual mode?????

I was going to ask the same question.

Manual mode... Looks like it is an option but I've never had the option on my other trucks and I'm not sure how to use it. Can it be turned on and off while moving? I don't want to mess up the transmission doing something stupid. I wonder why they train people on one truck and throw them into a different type when they go solo. In some ways it's a big adjustment.

I know in the freightliners you can shift up or down manual even while its still in auto mode, maybe try that in your international? Unless youre out of line with the shift like trying to down shift when you're high rpms in current gear it should do what you ask.

Sure you can use it while moving, just pull it down into “M”. Once there, push the button up to the next higher gear and see what happens. It should display somewhere the gear you are in. If you stay in Manual Mode, it will stay in that gear, even if you stop. You may need to remember this when you try to go again on green and it is still selected to be in 7th gear.

Manual mode... Looks like it is an option but I've never had the option on my other trucks and I'm not sure how to use it. Can it be turned on and off while moving? I don't want to mess up the transmission doing something stupid. I wonder why they train people on one truck and throw them into a different type when they go solo. In some ways it's a big adjustment.

You can turn manual mode off and on while driving. Just be aware if you turn it on it will not shift itself so you have to do the shifs yourself. I'd just try and shift in your instances while staying in auto and use manual mode for snow driving and grades as needed.

I'll give it a try on a safe stretch of road. On this model it looks like you push in a button at the end of the wand to engage manual then push the wand forward+ or pull it-. Thanks ya'll. I'm still going to ask if the shift points are where they are supposed to be.

I'll give it a try on a safe stretch of road. On this model it looks like you push in a button at the end of the wand to engage manual then push the wand forward+ or pull it-. Thanks ya'll. I'm still going to ask if the shift points are where they are supposed to be.

If it's like the freightliners you can shift up For down without turning on manual mode, this is considered suggesting the shift to the transmission, if it agrees it does it. Use manual mode for when you don't want the truck to shift unless you tell it to. Like driving up an incline in the winter where the roads are a bit slick. You dont want to shift and lose momentum in that situation.