You will just have to determine what series the carrier is for the 2.56 gears and whether or not there is a 3.42 gear set for that series of carrier. One of the many differential parts suppliers should be able to help you figure it out. According to what I'm seeing from both Yukon and Richmond, the carrier will need to be replaced with a 2.73 and lower carrier. You may want to verify that.
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Originally Posted by G-NUT
Thanks for the info.
I'm wanting to change to a 3.42 and a limited slip. Can I do this with this 10 bolt 8.5 axle that contains an open diff and 2.56 gears? I've read some say you can while some say you cannot.
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