Hey yall, I just bought a 79 Chevy C60 Wrecker. 366 BBC, 5 speed, 2 speed rear, dual winches, dual swivel booms, etc. I know this site mainly focuses on pre 73 stuff, but I figure the good folks in the Big Bolts section will know a bit about the later big trucks as well. I'm a bit new to the 2 ton stuff, myself. My 1 ton is getting too beat down pulling heavy so I needed a bigger truck.
One odd thing about it is the rear end looks like it was possibly swapped. For one it's a 6 lug instead of the usual 10 lug or spoke wheel hubs I usually see on them. The 2 speed wires either weren't ever hooked up when the new rear end was put in or something went wrong with it and they snipped them. An IH Loadstar 1600 that a briefly had a couple years back had the same 2 speed box so I'm guessing it came in quite a few different trucks.
So which wire hooks up to what? There's 2 coming from the box and 3 coming from the frame, so I'm guessing one is a ground? I've tried having a touching the wires together while my friend flips the switch to see if I can hear it shift. But I guess I need to figure out which is the ground before that does any good.
Also, right now, I'm not sure which gear the rear is in right now. It currently tops out at an honest 60 mph give or take a few so I'm guessing high. That sound about right?
Onto some photos of it. Red Wrecker front Red wrecker rear
. Holmes 500 bed 20's
. 9.00R20 fronts with the normal 10 bolt wheel on 5 lug hubs like every other MD chevy I see. 22.5's
. 11-22.5's. 6 lug 2 speed box
. Looks like the typical eaton 2 speed box to me? Diff
. Does that rear end look factory?
Other Misc pics of the truck. Interior Shifter Engine bay 366
I guess that about covers it. Any help would be appreciated.