The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Overdrive for 3-speed

rickf · 09-18-2007, 02:15 PM

I've seen a couple mentions of Chevy 3-speeds with an overdrive. I'd like to know more about them.

My truck is a 64 C10, 3 on the tree.

What years/models of vehicle would come with an overdrive that is compatible with my truck's 3-speed? (If any.)

Does the overdrive directly replace my stock tailshaft?
I mean, will it bolt right up, is the same length, same bushing diameter, same splines, and my same drive line is going to fit?

Could the tailshaft/overdrive exchange be done with the transmission still in the truck?

What was the normal in cab control for the overdrive?

My C10 does indeed haul its share of 1/2 ton loads, will the overdrive hold up?

09-18-2007, 02:15 PM	#1
rickf Registered User Join Date: Dec 2005 Location: Lake Oswego, OR Posts: 318	Overdrive for 3-speed I've seen a couple mentions of Chevy 3-speeds with an overdrive. I'd like to know more about them. My truck is a 64 C10, 3 on the tree. What years/models of vehicle would come with an overdrive that is compatible with my truck's 3-speed? (If any.) Does the overdrive directly replace my stock tailshaft? I mean, will it bolt right up, is the same length, same bushing diameter, same splines, and my same drive line is going to fit? Could the tailshaft/overdrive exchange be done with the transmission still in the truck? What was the normal in cab control for the overdrive? My C10 does indeed haul its share of 1/2 ton loads, will the overdrive hold up?