No adapter is needed. AMC straight sixes and V8's share the same bellhousing bolt pattern. The problem you will run into is the crank position sensor. The 4.0 engines have it located on the flywheel (flexplate on an auto) and your bellhousing will need to be adapted for the sensor to bolt to it. Unfortunately a flexplate which has the sensor in it won't bolt to the torque convertor on the T400. One way around both problems is a harmonic balancer mounted CPS from Hesco. It is expensive though, but I don't know of any other options. Check Novak Adapter's website to see if there's any info there. They tend to have more technical knowledge than Advance does and build better adapters IMO. www.novak-adapt.com
This is exactly what your talking about CSP correct ?
4.0L Crank sensor relocation kit.
This kit aids in the installation of a 4.0L engine into an early model Jeep that does not have a provision for the stock sensor.
It can also be used when installing a Turbo 400 or 700R4 transmission. This kit re-locates the firing pattern and crank sensor to the front of the engine. This eliminates the problem of drilling the bellhousing and indexing a stock sensor.
So, if this solves that problem, thats cool. What exactly do I need to get then ? Getting a 4.0 should be hard, it's finding a donor in my area thats the hard part. So, what exactly is needed ? CSP, you done this before or what ? lol
A good friend of mine just did the 4.0L swap into his '79 CJ7. This CJ also has a non-stock TH400/D20 combo (probably from a Cherokee).
He did relocate the crank sensor to the front.
Overall, I think he has just under $1K into this swap. The 4.0L (from a '94 ZJ) is WELL suited to the TH400 in this light vehicle, it has great acceleration, easily chirps in 2nd, and is getting ~19 mpg...
I'll ask him to check in on this thread, maybe he can help with other questions, like the flexplate, etc..
Once I plan this out, I know it will be well worth it. Gas mileage, power and fuel injection. I was looking at over all horsepower, and its like 180 for the 4.0, my V8 if I rebuild it is at 150. For a daily driver, and hunting rig, the 4.0 really makes the most sense.
Now, getting the parts to make it work wont be hard, getting a donor vehicle/motor and accessories at a good price, I think thats the hard part.
Hesco for the reloacation for the sensor
Novak for the flexplate ( still gotta look for that on thier site/email em )
Progress..thanks guys, for the time and answers. I am feeling more confident everyday. Now to convince my wife on this idea. She already wants garage back, but CJ is down to frame.
Antman check with www.jeepconnection.com for the crankshaft dampner kit. They sell Hesco parts and are usually cheaper than buying directly from Hesco. They may not have it listed on their website, so be sure and call them if you don't see it.
Here is a copy of the wright up that I put on another board.
My friend of 35 years helped me. We made a bracket to bolt to the 4.0 for the crank sensor and planed to notch the transmission, but the flex plate wouldn’t clear the torque converter. Plan B was to get the crank senor relocating kit from Advanced Adapter (this was a good move) the new damper went right on but the belt hit the sensor bracket. I called AA and was told that they just re-engineered the kit for a two-bolt sensor and forgot to look at the belt (sent a new belt no charge). Installed the belt, no spark. We used a VOM to read the new sensor and compare it to the one I got from the Grand, not even close. Called AA, bad sensor, sent out a new one no charge.
The fuel came from a ’99 Ford Ranger (Part Mike told me to use a Ranger pump?). What I did was drop the tank pull the sending unit measure the depth of the tank and the length of the pick up tube. I cut the pick up tube and installed the pump to the longest dimension to just keep it off the bottom of the tank ran the wires through a hole drilled through the top of the sending unit using a grommet and some hardening gasket stuff to seal the hole. The filter was one that looked like it would work and one the guy at Advanced Auto recommended. I used rubber hose from the sending unit to the filter and hard line from the filter to the fuel rail so keep that in mind when picking out a filter.
The fuse / relay box, along with the harness and computer came from the ’94 Grand. I had to lengthen some of the wires because I mounted the computer on the left side of the firewall under the master cylinder and the relay box of the right fender. We had to run through the wires three times not knowing the computer was the problem that it wouldn’t run longer that a second or two. The Grand had a VTSS (vehicle theft security system) and was working with no way to dis-arm it the bone yard let me exchange it for one out of a ’92 Cherokee.
I had to do the swap in my friend’s garage because I didn’t have the headroom to pull the engine so it took 18 days start to finish (not working every day).
All is well and runs like h--l.
If you have any questions, let me know maybe I can help.
Well, found out what GrandCJ did to make the flexplate work....
"I did however use that plate as a pattern for drilling holes in the stock 4.0 flex plate. But the 4.0 flex plate had a big lip that the crank sensor reads and would not fit over the converter. So I cut and ground down the lip and it works fine."
Sounds like all my answers are answered.
Sensor reloaction bracket from Hesco
Computer and Harness from Hesco
Bushing made for my torque converter to fit
Some drilling and drinding of the 4.0 flexplate
*question about the flexplate, drilling and grinding will affect weight, this shouldnt be a problem correct ? I think not...just making sure.