Re: FW: Jeep 4.0 in an American?

["Jim Blair" <carnuck@xxxxxxxxxxx>]

A: You can also go with a 999 auto from a 2WD Wrangler which has the 
bellhousing hole for the HO CPS and use the flexplate as well. (I have a 
core case from a 2000 TJ in my 4 sale stuff)


From: farna@xxxxxxx
Subject: Re: FW: Jeep 4.0 in an American?
To: mail@xxxxxxxxxxxx
Message-ID: <ADVANCES62L1c00goZo000003e7@xxxxxxxxxxxxxxxxxxxxxxx>

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.