Going thru the gears on my '78 GMC Brigadier Detroit 6V53 10 gear RR

About GMC Brigadier

The GMC Brigadier is a series of heavy-duty trucks that were assembled by the GMC Truck and Coach Division of General Motors. The second generation of the H/J-series heavy-duty conventionals, the Brigadier was produced from 1978 to late 1989, as a WhiteGMC for the last year and a half. Slotted between the largest medium-duty C/K trucks and the GMC General, the Brigadier was a Class 7-8 short-hood conventional similar to the Ford L-Series and Mack Model R. Configured in both straight truck and se...