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**69TowRig** · 07-29-2009, 08:18 AM

3.42s would be a middle-ground between the two. 3.23s are tall gears to push. It really depends on what you had for stock tires, do you remember the size? What you have now is ~32" tall.

As for fuel mileage, it somewhat depends on how and where you drive it. Flatland cruising might see a small drop since the engine is revving much faster, but on the flip side if it is lugging right now on the flats it might improve things. It will reduce the amount of transmission gear hunting since lower gearing will keep you higher in the power curve.

07-29-2009, 08:18 AM	#3
69TowRig Senior Member Join Date: Jan 2005 Location: Raleigh, NC Posts: 897	Re: Gear swap info/help pls 3.42s would be a middle-ground between the two. 3.23s are tall gears to push. It really depends on what you had for stock tires, do you remember the size? What you have now is ~32" tall. As for fuel mileage, it somewhat depends on how and where you drive it. Flatland cruising might see a small drop since the engine is revving much faster, but on the flip side if it is lugging right now on the flats it might improve things. It will reduce the amount of transmission gear hunting since lower gearing will keep you higher in the power curve. __________________ -Chris Building a stripper, one part at a time: 1969 K5, 307, 3spd, 3 seats, hard top. Added Pwr Discs, Pwr Steering, Aux Battery, T-case Skid, Lighted Sidemarkers, HEI, Lock-Right Diff, ECE Class IV Hitch, 32" MT/Rs. Parts to Install: Hand Throttle, Console, Tow Hooks, Dual Horns, AM-FM, Dealer Swing-Away Tire Carrier, Gas Tank Skid. Also building a 1950 Willys CJ-3A and off-roading a 2001 Nissan Frontier on 1-Ton Portals...