Originally Posted by jeffro1965
I have an 06 X 4.0 auto. Dana 35. Factory 3:73. Can I install 4:56 gears without changing the carrier?
You won't need a new carrier for either axle, your present 3.73 carrier is good for 4.56 in both the D30 and D35 axles.
But for future regearing jobs, don't sweat a new carrier. They are low in cost ($60-80) and have to be removed & reinstalled during a ring & pinion installation anyway so there is no additional labor cost involved in the swap. Given how much the total bill is for regearing both axles, the cost of a new carrier is insignificant.