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Re: Best gear ratio for lq4 or lq9 w/ 4l65e
Tire height plays a huge role in rpm. I have a 27" tire and 3:42 in my suburban It needs more rpm for performance and towing. Cruise on freeway it's great.
Same goes for my work truck it has 32" tire and 3:73. It needs at least a 4:11 to work the way I wish it would. Even a 4:56 wouldn't be out of the question.
Play with the rpm calculator and decide what you want most out of the truck. Hwy cruiser or performance hauler. Remember the Denali trucks came with 4:11 and 32" tire and they are quick.
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