Our 2010 D13 with ishift has that warning but comes and goes. With no load it shifts 1first-5th-9th-12th with no problem-nor error. When with a heavy load it shifts 1-2-3-4-5-6-7-8-9 etc. and I get the "Check transmission" error but no "low air warning" and air stays mostly at 100-105# Then the truck shuts down and have to pull over, shut off and restart. What does that tell? thanks Francis
Shifting is normal under load they have suspension sensor for trans that changes shift pattern. Need to check what the code is when you get check trans might be something with clutch Sydney or something electrical with trans if you can post up code on dash I can point u in the right direction
Aloha, Nasriza, two codes, but neither seems relevant. Mid 144 PSID 230 FMI 5 and Mid 140 Pid 77 Fmi 5 thanks Franciss
