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    Champion RC12ECC spark plugs

    My 1999 4.0 Jeep TJ has the Champion plug RC12ECC right on the label under the hood. I ve been running these and typically change them at 40-50K miles and they still look great. Gap might grow a little but can’t see a change in engine performance or measurable mpg. Due for another plug change...
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    Hack and tap 231 question

    Had a post a couple weeks ago getting some help on H&T. After more research here’s a question I have…. Ordered a new drive flange and going to pull driveline and old plate off. It appears the wear/wobble I have is at the existing drive flange but don’t know if t/c output shaft splines wore or...
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    Questions about SYE with double cardan driveshaft

    Have a Rubicon Express double cardavan driveshaft on my 99 TJ and a SYE setup. Had to replace the u-joints about 8-10 yrs ago and now starting to clatter/shake again. Upon further investigation it appears the u-joints still ok but the splined plate on the front of the driveshaft that bolts to...
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    IPF 900XSD conversion to LED s

    Have a ten year old set of IPF s 900XSD with H9 65w bulbs. Has anyone done a conversion to LED bulbs and if so 1) how simple was it, did U find a bulb that screwed right in with no modifications? 2) any part numbers, brand of LED bulbs used? I talked to ARB and they now have the units with LED...