[maple_leaf_eh]

I suspect your truck was well looked after in the service. Airplanes need fuel and bowser drivers weren't assigned based on the shine of their shoes. Driving a flammable load near airplanes is considered to be a plum job.

However, afterwards I expect that chassis was overloaded every trip it made.

For that reason, suggest you inspect closely. Look for broken leaf springs. Look for cracks in the frame. Have a look at every repair plate and understand why the last guy repaired what he did. The clutch is probably worn down to the steel as the driver feathered the pedal every shift. And that is just the first things to cross my mind.