The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Switching Rear-Ends

**Palf70Step** · 07-12-2005, 09:03 PM

With your engine mods in the Chevy, I think you'd be better off the way they are. The 3.08 will lower your RPMs, but if you have a heavy cam, it is probably going to want the revs and not lug at low RPMs. You might even see a loss in your gas milage. BTW, just so you'll know changing out the rear end gears would throw both vehicle speedos way out of wack. probably in the neighbor hood of 10-15 mph off.

To me if anything, I think I would switch tranny's. put all the mods in one truck, and use the GMC as a daily, stock driver.

07-12-2005, 09:03 PM	#4
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,468	With your engine mods in the Chevy, I think you'd be better off the way they are. The 3.08 will lower your RPMs, but if you have a heavy cam, it is probably going to want the revs and not lug at low RPMs. You might even see a loss in your gas milage. BTW, just so you'll know changing out the rear end gears would throw both vehicle speedos way out of wack. probably in the neighbor hood of 10-15 mph off. To me if anything, I think I would switch tranny's. put all the mods in one truck, and use the GMC as a daily, stock driver. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 07-12-2005 at 09:05 PM.