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Message: <blockquote data-quote="Marky Dissod" data-source="post: 28584" data-attributes="member: 13218">It's not an opinion, 4.8L will never have much torque, and you gave up power under 2500RpM for power at higher RpMs.If you find a converter that will maintain low-throttle drivability AND stall at a higher RpM, you're still never getting any MpGs back.From stop sign to stop sign / red light to red light, 4.56 with 33" will not be that bad, on the highway you'll lose MpG. Maybe 4.30. You know your environment.Many GMT800 4.8L Tahoes & Sielvierrados came with 4.10. Swapping an entire axle outright might be less than changing R&P inside the pumpkin, definitely simpler.</blockquote>