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Spreadsheets are showing no way to have the 4.8 at a useful RPM for towing with a 2.73:1 or even 3.08:1 axle, I'm considering selling my SM465 and my 4L60E to get a NV3500 with the 3.49 / 2.16 / 1.40 / 1.00 / 0.73 gearset. SM465 is 6.55 / 3.58 / 1.70 / 1.00
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