Originally Posted by WatchThis!
I see you have made up your mind but I will make a few points for anyone else considering the same thing.
You would have to change your carrier anyways since you have 3:21's so it would cost you more then you think.
The reason people charge more to install used gears is that it has to be perfect to match the wear pattern that the gears have established.
Also new gear sets are not that expensive, you would still have to pay for the install kit and labor. So why save a 100/150 bucks and not have any warranty?
This. Why buy used to save $100 on a $1500-2000 job?
FWIW, I have installed a few sets of used gears. All but one of them I removed myself. Each time I marked the gear pattern and measured the backlash before removal so I would know how they had been run before because "in spec" isn't close enough for used gears, they have to be EXACTLY as they were run before or they will be noisy and will likely fail. Plan on used gear to take twice as long to install as new (probably $400 more per axle in labor) and still expect them to make noise. And if the seller of the used gears doesn't have the pattern and backlash documented you have basically zero chance of them every being right.
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