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In a message dated 11/25/2001 1:09:53 AM Eastern Standard Time, [EMAIL PROTECTED] writes: > dale: > i was baffled when the 3.70 gears showed up. i had always seen 3.73 listed > and to be quite frank had never seen 3.70 or 3.07 listed before. oh well > another of gm's great mysterys.there isn't a day goes by that i don't learn > something new about CHEVELLES. i also noticed the list for 1967s on team > chevelle didn't have the 2.73 ratio listed. i wonder why there were so many > ratios so close? > > Larry > Probably to get just the 'right' total torque multiplication ratio given the particular equipment used with the vehicle. Total torque ratio = rear end ratio * tranny ratio. But as you said Larry, it is hard to believe that in this case that the .03 difference (3.73 to 3.70) would make much of a difference. Check out the packet from the GM customer info center. There is some good info under Power Team Combinations with a matrix of engine, tranny, induction equipment and axle ratio. The chart is a little ambiguous, and lists an overdrive application (what overdrive???), but clearly shows the 3.73 ratio used for Chevelle SS applications. For the 66 model year, it shows the 3.70 gears only being used in small block applications. The chart also shows the 3.73's were standard on the L34 (360HP) w/ M35 (powerglide) cars, while A/C cars got the 3.07 ratio. Most of the 66 SS's that I have seen around here had the 3.73's in them, all though a couple had the 4.10's. BTW, all that I looked at were non A/C cars. I would bet very similar Powertrain combos were available for the 67 model year. --------------------- Kurt Ehrhardt ACES #1280 66 Malibu 66 SuperSport Enfield, CT ----------------------------------------------------- To Unsubscribe please visit www.chevelles.net/list.html To start a new topic, send mail to: [EMAIL PROTECTED]
