Transmission Opinion Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sjarrett71 · 12-27-2010, 10:58 PM

My 72 GMC currently has a granny low 4-speed in it. Eventually I want to go back to an automatic (it was originally an auto from the factory) but I found a 3 speed manual close to me that is reasonably priced. I don't know the different gear ratios in the transmissions and I understand the granny low is basically like a 3 speed with the low gear.

My question is, would going to the 3 speed benefit me in any way such as speed or gas mileage or lowering my RPM's?

Thanks.

12-27-2010, 10:58 PM	#1
sjarrett71 Registered User Join Date: Dec 2006 Location: Rolla, MO Posts: 2,463	Transmission Opinion Question My 72 GMC currently has a granny low 4-speed in it. Eventually I want to go back to an automatic (it was originally an auto from the factory) but I found a 3 speed manual close to me that is reasonably priced. I don't know the different gear ratios in the transmissions and I understand the granny low is basically like a 3 speed with the low gear. My question is, would going to the 3 speed benefit me in any way such as speed or gas mileage or lowering my RPM's? Thanks. __________________ -Scott- Last edited by sjarrett71; 12-27-2010 at 11:10 PM.



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