Gotcha.
I was reading back through a search trying to find a source for an original style fuel pump from my 1935 1!1/2 ton Chevy. No luck (of course!). However, I stumbled across something regarding my 1958 1 1/2 ton GMC (370) grain truck. I'm always looking for threads about the two speed axle. Shortly after I got it the electric shift motor quit working. The brushes had worn completely down. I ended up flipping the brushes and shimming them out. I do use the truck for heavy loads frequently on the farm and split shift it a lot so I know I need to be on the lookout for a permanent fix.
I just read in an old thread that even GMC didn't have electric two speed until the early 60's. Is this correct? I'm the third owner of my truck and it's been very untouched right down to all of the oil change stickers and records. I can't imagine another farmer paying to swap it out - most do what I did for months: get it into high and leave it there. When did electric two speed come into play for the 370?
