Re: FW: Jeep 4.0 in an American?

[farna@xxxxxxx]

That's what I'm doing Ben! I was one of the first to drop a 4.0L in an older Rambler, in my case a 63 Classic wagon, which I still drive (but with a stroked 4.0L -- now 4.6L). It's not a hard job, you just need EVERYTHING attached to the computer wiring harness from the Jeep and wiring diagrams for the Jeep model and your car. One hint: don't cut the Jeep harness at the firewall connector. Pull the screw out of the center and pull it instead. It's hard to get to with the brake booster in place (remove it!), but worth the effort. Then you can get the pin-out for the connector from the local Jeep dealer and find the wires easier. The connector is in two halves once pulled -- one half has mainly lights, the other engine stuff. The engine half will have a few ancillary items like the windshield wipers on it, but those are easy to find and can be cut. No, you can't reduce the wiring any! I traced every @#$@$#% wire when I did mine thinking I could cut some of it down. Was a waste!
 d effort! 

You can use any 72 or later transmission, but you're better off to use the Jeep trans that comes with the engine. 2WD versions are pretty common down south, and the AW4 automatic is as bullet proof an auto trans as you can find (at least behind sixes and small V-8s -- Lexus V-8 models use it but have a couple more clutch discs than the 4.0L application). If you use a trans that wasn't designed for the 4.0L you either have to modify the bell for a CPS (crankshaft position sensor) and flexplate for the TF converter if an auto. HESCO makes a $250 or so kit to move the CPS to the balancer (includes a new balancer machined for the sensor) now, which makes things much easier. Advance Adapters has one that's a bit cheaper, but only for the 90+ HO engines. HESCO makes one for the 87-90 Renix system and 90+ HO. 

If you're using the AW4 make sure you get the trans, engine, and controls from the same vehicle. 87-95 Jeeps have the trans controller separate from the engine controller. Trans controller is mounted on the panel under the glove box. 96+ has an integrated engine/trans controller (PCM - powertrain control module). The 96+ also uses an electronic speedo. IIRC it uses an adapter in the trans and a speedo cable can be used. If you use custom gauges any aftermarket electronic speedo will work with the factory sensor. 

On April 18, 2005 Benjamin Lowe wrote:

> I've got a chance to buy a '65 American with a run out flathead, and I was
> toying with an idea that Mark Montoni and I threw around some years ago:
> putting in a Jeep four-liter and using it as a fairly modern driver.  I just
> thought I'd throw it open to the group for y'all's thoughts...
> Ben Lowe
> Jacksonville, Florida
> "Temporarily between AMCs..."
> 
> 
> 
> 
> 
> 
> .


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