I have tried to do some research on my own. Are the front differentials different on the 96-00 and 01-02 models? I am trying to swap my front diff from my 99 to my 01. I want to swap my e-lcoker setup over but my 99 is 4.30 ratio and the 01 is 4.10. I have read somewhere that the 96-00 uses vacuum lines and the 01-02 models don't.