ERF B Series Cummins NHC 250 with Jake Brake loaded test drive

Another ride along road test of my 1980 ERF B series with a mate driving, new diff with a better ratio just fitted (4.88:1 from 6.17:1) loaded trailer to see how she performed, turns out pretty well. Cummins NHC 250, Fuller 9 Speed, Eaton 19120 single drive with rear lift tag axle.