55 second series 3 speed overdrive questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**WIDESIDE72** · 03-21-2015, 09:22 AM

I am usually on the 67-72 side and have redone a 71 GMC custom swb step and 72 cheyenne swb step. I have a 55 big window that ive owned for 30 yrs (!) that i need to get going again. Back in the eighties my brother installed an overdrive that if i remember correctly came out of a 58/59. Unfortunately the donor truck didnt have any of the wiring or controls. My truck is all original but needs a full restoration. I found a wiring harness from Jim Carter but does anyone have any more info about getting the overdrive working correctly?

03-21-2015, 09:22 AM	#1
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,496	55 second series 3 speed overdrive questions I am usually on the 67-72 side and have redone a 71 GMC custom swb step and 72 cheyenne swb step. I have a 55 big window that ive owned for 30 yrs (!) that i need to get going again. Back in the eighties my brother installed an overdrive that if i remember correctly came out of a 58/59. Unfortunately the donor truck didnt have any of the wiring or controls. My truck is all original but needs a full restoration. I found a wiring harness from Jim Carter but does anyone have any more info about getting the overdrive working correctly?



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