I've heard of putting a TJ front axle shaft into the passenger side of a YJ to bypass the vacuum mess. What else do you need to do? Put a seal down in the diff? Somewhere else in the tube?
somebody over on naxja did it in his XJ witha vac. disconnect on it. i think there was grinding on the inner housing to get a sal in there...look for 95.5 yj sahfts to get the 297x joint but still keep the vacum disconnect set up.
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