A: Acording to Chrysler news, the 4.0L will be going away in '07. My '87 with 5 speed has the big plug and so have the other '87/88s I've had/looked at. I've hauled a few 1500lb plus loads (some in the truck and some on a trailer) with my 2wd BA 10/5, but it was rebuilt by Jeep about 10 years ago (cost the guy @$1500 too!) From: farna@xxxxxxx Subject: Re: 4.0L basic Intro To: mail@xxxxxxxxxxxx Message-ID: <ADVANCES62LTiImUnRE00001b78@xxxxxxxxxxxxxxxxxxxxxxx> Just a couple comments on Jim's (very good!) XJ/4.0L post: 1. The 4.0L is still in production for the Wrangler. It's just not used in the Liberty or Grand Cherokee. 2. 87-88 stick shift models don't have the big connector in the wiring harness. At least the 87 I pulled my first 4.0L from didn't (five speed model, trans was already gone). 3. 87-95 AW-4 models have a separate tranny controller under the glove box. It's mounted on the plastic "knee panel". 96+ models use a PCM (Powertrain Control Module) instead of an ECM (Engine Control Module). The PCM has tranny and cruise controller combined with the ECM into one unit. Some gauges get their input from the PCM instead of separate sending units. Just leave the gauges disconnected and use separate senders for a swap. 4. Renix units get all speed, timing, and crankshaft position information from the CPS, later units just get timing and position info from it. The difference is the flywheel/flexplate. Renix has notches all around, later has a set of 3-4 notches every 120 degrees. Flywheels/flexplates and sensors can't be interchanged. Renix uses an induction coil pickup, later a Hall Effect switch (magnetic switch). If you change to a balancer CPS you have to have the right one for your system. AFAIK HESCO is the only source for Renix balancer CPS kits. 5. As Jim stated, the early five speed (Peugeot BA 10/5) used with the 4.0L is a bit on the weak side for trail work. But it's fine for a street vehicle that sees only light trail work, mainly rough roads, and no heavy loads. In other words, it's fine for yuppies! If you find one in good condition the vehicle hasn't been worked hard, so should carry on fine. If you or your daughter plan on using it for a tow vehicle or to do some real off roading, look for the AX 15. On July 4, 2005 Jim B wrote: > All the years of XJ/MJ/TJ/ZJ and late YJ with 4.0L have their good/bad > points '87 to the end of 4.0L production (good points to know for for > engine > swaps too).