Originally Posted By: KenO
Originally Posted By: NHGUY
Is the gear ratio the same? Your speedo may be off.
Speedo is driven off the trans, so no it won't. But, I'm going from a 3.73 to a 4.10. Spoke to my tuner (truck has an 0411 PCM swap and custom tune) and he said the shift points should be the same between both gears, so he said I should be a-ok to just swap.
IF the speedo is driven from a VSS on a FRONT wheel, the rear end ratio doesn't matter, but if from the transmission it does.