The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What is the best cruising RPM ?? I need a good rear ratio and tranny!

Longhorn Man · 02-07-2007, 07:05 PM

If I'm not mistaken, the tremec 5 speed is not an overdrive.
2000 - 2500 RPM is what I would say you should shoot for.
Any idea on what kinda torque numbers this engine will pull? If it has a bunch of torque down low, then a low gear would be wasted. The caddy motors make so much low end power that you can run real low gears, like a high 2.something, and it'll still pull like crazy from the lights, yes loaf along at 2000 RPM in a one to one final gear. With a tall gear, there is no need for an overdrive, and you indicated cost being an issue... there are no low cost overdrives that'll handle your engine... not for a long peroid of time anyways.

02-07-2007, 07:05 PM	#14
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: What is the best cruising RPM ?? I need a good rear ratio and tranny! If I'm not mistaken, the tremec 5 speed is not an overdrive. 2000 - 2500 RPM is what I would say you should shoot for. Any idea on what kinda torque numbers this engine will pull? If it has a bunch of torque down low, then a low gear would be wasted. The caddy motors make so much low end power that you can run real low gears, like a high 2.something, and it'll still pull like crazy from the lights, yes loaf along at 2000 RPM in a one to one final gear. With a tall gear, there is no need for an overdrive, and you indicated cost being an issue... there are no low cost overdrives that'll handle your engine... not for a long peroid of time anyways.