Volvo I-Shift low rpm 10,11,12 gear problem NO CODES see video

Yeah, I hear that I shift is pretty nifty……………… When it’s working.

with the engine and transmission talking to each other and computers controlling everything, I don’t think you can diagnose it without plugging it into a computer.

someone can correct me if I’m wrong.

start with the obvious first, did you check the fluid level?

 

Just a thought, but maybe something electrical. Bad ground wire somewhere causing loss of electrical power to the transmission controller?

 

Need to pull and see if there is any sort of codes this could be a few different things, even parameters set up could cause the rpm like this, noise thats a different story.

 

Do you know if you have a kick down option on your trans or premium shifter, i shift has a problem rpm for down shift its to low and if not programed with the other two options makes for very pain in the ### driving specially on hills, second thing you need to check is also check make sure your leveling valve is working properly and keep the airbags at the right level

 

Did u find out solutions please let me know

 

I had a problem that I thought the truck didn't have power in low RPMs and was developing vibration and the only solution was to downshift manually but then it seem like the RPMs were too high, replacing all 3 engine mounts solved the problem, 2014 Volvo d13 with ishift I had about 460k miles at that time. A year later still runs fine.

 

was it any particular gear that you felt the vibration in? I am having trouble when loaded heavy, uphill, when it goes from 12 to 11th gear around 50 mph, it starts to vibrate. The humming of the engine starts going in and out as if it is cutting out but the rpm needle doesn’t drop or fluctuate with the sound.

 

Did you ever figure your issue out?