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

**WorkinLonghorn** · 01-07-2007, 02:26 PM

Well,unfortunately I only have data for 1969 from the original GM "Truck Data Book" from that year and they only list the two 3-speeds I listed in my first post;regular (2.85-1) and HD (3.03-1).There was also an overdrive unit available on the C-10 with 4.11 rear only,but it has the same 2.85 1st gear.
These two 3-spds were fully sync'd.-cougar

01-07-2007, 02:26 PM	#12
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,855	Re: Looking For Info on 3-Speed Trans Ratios Well,unfortunately I only have data for 1969 from the original GM "Truck Data Book" from that year and they only list the two 3-speeds I listed in my first post;regular (2.85-1) and HD (3.03-1).There was also an overdrive unit available on the C-10 with 4.11 rear only,but it has the same 2.85 1st gear. These two 3-spds were fully sync'd.-cougar __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.