[biblewonk]

No, it's just that you couldn't push soft enough on the throttle, while the tranny was locked in, to cruise at 60 mph.

[brianl703]

Sounds like something wasn't adjusted quite right.

Did it by chance have the idle set to 1500RPM or so?

[Jack of all Trades]

Your problem with the Olds diesel was probably due to a misadjusted or bad fuel pump. In that pump the throttle pedal moves a fuel governor assembly which in turn controls a fuel metering valve. In effect the driver is not directly controlling injected fuel quantity. If the governor or metering valve were not spec'd and adjusted correctly you could have some very abrupt speed/power changes.