The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Looking For Info on 3-Speed Trans Ratios

C10 - C90 Bill · 01-07-2007, 01:32 AM

I've never proved what ratio I have, but I feel pretty certain about it being a 3.73. Check back to my second post, if you would, and you can read about my over-revving on the highway problem.

If GM didn't offer a trans with a much higher first than a 2.85, then it's almost like someone along the line replaced first gear with a much different ratio. Which, I guess is possible. I'll probably just try another trans one day.

01-07-2007, 01:32 AM	#9
C10 - C90 Bill Registered User Join Date: Nov 2001 Location: Moneta, VA USA Posts: 3,064	Re: Looking For Info on 3-Speed Trans Ratios I've never proved what ratio I have, but I feel pretty certain about it being a 3.73. Check back to my second post, if you would, and you can read about my over-revving on the highway problem. If GM didn't offer a trans with a much higher first than a 2.85, then it's almost like someone along the line replaced first gear with a much different ratio. Which, I guess is possible. I'll probably just try another trans one day.