I have an opportunity to get some used 4.10's that only have a 1000 miles on them; are used gears ok or should I buy new? I've heard you should only by gears new, but I think I've seen some for sale on here before. I'm running 33's now with no immediate plans for upgrading, and the 3.21's are killing me...

thanks ahead of time for all the advice

 

Bump
Any thoughts ou there?

 

You should be o.k. with them if the mileage is that low. Setting up used gears is sometimes problematic because of the wear pattern in the previous vehicle. It depends on who sets them up as much as anything.

 

ditto...........

 

Ok thanks. I'll check with some local 4wd shops and see what they think about setting them up.

 

i bought a set of 4.10's from ebay for $80. Just had to buy a shim kit and the install is easy. There are a lot of companies selling them for cheap that have only a hundred miles or so on them. Mine came.. .looked brand new. There are also a lot of the limited slip units out there for short money in the same condition.

Ohh.. side note. Just had the dealership do an oil change. they noticed some gear oil seeping around pinion seal. So they resealed the pinion. No one said a word about the different gears.

 

I had used gears installed in my JK and zero problems. The guys at Randy's R&P told me that it was really common and they rarely saw any problems.