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Truck Repair/Freightliner ISX500 get randomly stuck in 2nd and reverse gear


I have a 2009 Freightliner ISX500 Argosy. I would like to get some advise on the problem of getting stuck in gears (automatic or manual). The problem started about 3 months ago with the gearbox got stuck several times in 10th and 11th gear. The agents for Freightliner in Namibia replaced the gearbox controller and xy selector with various valves on gearbox. This made the problem better, but it still randomly gets stuck in 2nd and reverse gear.

When the gear gets stuck, all I need to do is to move the truck for about 20-40m (forward or backwards depending on which gear it is in) and it will automatically correct itself. This, as you can imagine is a huge problem when you move in small spaces. The error on the display indicates flashing "Check transmission" and F2 ör FR flashing. It won't allow me to change to Neutral, and with a loud beeping sound it will remain in gear.

Thank you for taking time to give me your best advise.

i'm guessing what you have is a eaton autoshift. That's what freightliner normally uses there is 3 sensors on it two in the top plate for your countershafts and one is your tailshaft sensor. We've had a lot of problems with those sensors acting up. That's in Volvo trucks a eaton auto should be the same regardless of what truck it's in. Another problem we've had is the transmission harness the newer harness has some kind of capacitor in it that the older one's didn't have. That's a small harness goes from those three sensors too the transmission ecm. I would try the sensors first.

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Jeff Drumm


I Can answer any question pertaining to semi trucks and trailers. Have no experience in the automotive field so not able to help in that area.


My experiences in Semi Trucks is. I own my own truck and i presntly maintain a 80 truck fleet. Can handle any questions pertaining to a truck have tore apart and rebuilt every aspect on them. Fleet I deal with is Mainly Volvo trucks and a handful of freightliners. Work on automated transmissions on a daily basis along with carrier apu's. With engines my specialty is the 60 series Detroit but do work on the cummins isx the n-14 and the ism. and also the Volvo engines.

Have a College Degree from university of northwestern ohio in diesel and agriculture mechanics. Have 10 years behind the wheel driving a truck and 4 years working on trucks full time. Also have grown up on a farm so have been tinkering on trucks and tractors all my life.

Awards and Honors
I've gone through online schooling and have received certificates from webb wheel, Timken and Volvo academy.

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