I have a '46 Chev 1/2 ton that had a rebuilt '54 235 put in it along with an NOS heavy duty "gear jammer" 4 speed in 1986. This is the no synchro transmission that requires double clutching at every gear change. At the same time I went to the larger "heavy duty" clutch. This truck is driven about 2000-2500 miles per year. The entire arrangement is still in service. Clutch chatters a bit when the truck is cold, but smooths out completely once it's warmed up. Oh yeah, not doing any burnouts -
(couldn't if I wanted to). Yes, you read that right - I've run it about 55,000 miles since the rebuild.
David Bush
