The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - LWB 2wd truck with factory buddy seats & factory OVERDRIVE?

Longhorn Man · 01-22-2011, 10:13 PM

probably 10 to 12 like the average truck.
The stock overdrive was more to make up for low gearing.
A lame engine can feel stronger with deep gears (4.11 with a small diameter tire like the typical 1/2 ton) but then it is screaming at road speed, so add another gear on the top end. I'd bet a kick in the daddy parts that the cruise RPM would be somewhere around the same as the same engine with a 3 speed (or 4 speed, doesn't matter) and a 3.07 gear.
It was kind of the same idea as the granny gear 4 speed. 4 speed trucks (other than 307 small block ones) generally had the 3.07 gear (talking 1/2 ton here) It was driven like a 3 speed, but if you needed to pull on something, you'd actually use first. But then in final gear on the freeway, you were doing OK on the RPMs in the 2500 to 2700 area.

01-22-2011, 10:13 PM	#16
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: LWB 2wd truck with factory buddy seats & factory OVERDRIVE? probably 10 to 12 like the average truck. The stock overdrive was more to make up for low gearing. A lame engine can feel stronger with deep gears (4.11 with a small diameter tire like the typical 1/2 ton) but then it is screaming at road speed, so add another gear on the top end. I'd bet a kick in the daddy parts that the cruise RPM would be somewhere around the same as the same engine with a 3 speed (or 4 speed, doesn't matter) and a 3.07 gear. It was kind of the same idea as the granny gear 4 speed. 4 speed trucks (other than 307 small block ones) generally had the 3.07 gear (talking 1/2 ton here) It was driven like a 3 speed, but if you needed to pull on something, you'd actually use first. But then in final gear on the freeway, you were doing OK on the RPMs in the 2500 to 2700 area.