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  1. C

    NP231 Rattle

    I have a 1994 YJ with the 4.0/aw4/Np231 out of a 1987 Cherokee. The donor XJ had 300k miles on it. When I first got this thing on the road, it had a horrible rattle that sounded like the transfer case chain any time I lifted off the throttle at highway speeds (40+). I bought another NP231...
  2. C

    Renix to HO swap questions

    I have a 1995 YJ which I have swapped in a 1987 XJ 4.0.AW4. I have converted the engine to 1993 4.0L electronics with a 1993 computer, distributor, and harness. everything except the TPS has been converted to 1993 specs. I used a HESCO kit for the CPS. I had it running last night for the...
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