Here's short video clip I took while was logg trucking with my friend the other day. Truck is Scania 164 and has 16 -liter Scania V8 engine tuned up and dynotested putting out 750hp. Up hill he's puliing up to doesn't seem much on the clip but he has dual wheel spike chains on on all rear wheels, all full lockers on at rears and still pulling up hardly on 2nd gear.
Turn the volume all the way up and enjoy!!!