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

**Bob B.** · 01-01-2011, 12:02 AM

Wow, that is an oddball. Spicer 4 speed aux. transmissions were a common option, but only on 7500 series and larger GMC's in '67. Most likely some enterprising former owned stuck it in there. Does the transmission have model number plate on it? While we are on the subject, Warn (of winch and locking hub fame) manufactured a 2 speed aux. gearbox for manual transmission equipped GMC pickups in the late 60's. I would like to see one of those units, but I would imagine they are very rare.

01-01-2011, 12:02 AM	#8
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,395	Re: Question about a 67 GMC 4speed with aux trans (twin stick) Wow, that is an oddball. Spicer 4 speed aux. transmissions were a common option, but only on 7500 series and larger GMC's in '67. Most likely some enterprising former owned stuck it in there. Does the transmission have model number plate on it? While we are on the subject, Warn (of winch and locking hub fame) manufactured a 2 speed aux. gearbox for manual transmission equipped GMC pickups in the late 60's. I would like to see one of those units, but I would imagine they are very rare. __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.