Medium and Heavy Trucks
Have Truck Repair Questions? Ask an Expert
good afternoon my name is ***** ***** ill see what I can do to help.
when you hit your max at 35MPH how does the engine seem to run?
one issue with these engines is coolant level. Make sure the coolant tank is topped off to the mark.
any warning light on the dash lit?
I will be completely honest with you.... there are a bunch of things that can cause this issue and it may be next to impossible to diagnose this over a key board. There are somethings that need to be connected to a laptop to diagnose
does the engine seem to have good power up to 35?
does the engine rev up to the 2500 rpm mark?