Question about a 67 GMC 4speed with aux trans (twin stick) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70BLAZERX2 · 12-30-2010, 07:07 PM

Anyone know the gear ratio's of a spicer aux trans...I bought a 67 gmc ton a few years ago,had a 351 V6 and a spicer 4speed trans..behind that was another 4 speed trans..with a mini driveshaft and a seperate shifter..

Truck was an old moving van..long wheelbase..and was a calif. truck.

Is this an overdrive unit? in 67 build book it does say that aux trans was avail.

I will have to dig it out to get pics..truck is long gone..I saved the whole setup.

12-30-2010, 07:07 PM	#1
70BLAZERX2 Registered User Join Date: Jan 2010 Location: GREENEVILLE TENNESSEE Posts: 1,310	Question about a 67 GMC 4speed with aux trans (twin stick) Anyone know the gear ratio's of a spicer aux trans...I bought a 67 gmc ton a few years ago,had a 351 V6 and a spicer 4speed trans..behind that was another 4 speed trans..with a mini driveshaft and a seperate shifter.. Truck was an old moving van..long wheelbase..and was a calif. truck. Is this an overdrive unit? in 67 build book it does say that aux trans was avail. I will have to dig it out to get pics..truck is long gone..I saved the whole setup.



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