Automatic To Manual Transmission Question.

[onlyinajeep726]

I have a quick question that I'm sure one of you gurus can help me with.

 

I've been doing a little research on the AW4 to AX15 swap and I've seen where you can trick the AW4's TCM to bypass the NSS to allow it to start by jumping a couple of the pins in the harness.  I was wondering though, would it be possible to wire in a clutch safety switch into that so that it can only be started when the clutch pedal is depressed?  It sounds good in theory, just wondering if any of y'all have had success or know anyone who has done it that way.

[CRF136N]

Did this swap in my '96 xj (and love it btw) not sure what year you are working with, but my '96 is OBD2 so its super picky. For now I went to the junkyard an cut out the tranny side of the connector to the trans so I didnt cut ip my factory wiring an just connected the two nss wires together. It works great but I have a check engine light with the nss fault code. Had thought about your idea but problem is every time you push in the clutch its going to act like reconnecting those wires and trigger the CEL if you have one. I have been told throug relays or diodes its possible, but thats way beyond the effort I'm willing to give it. I have also been told swapping the ecu's to a manual unit would work, but the solution I found is a contact-when-pressed button I got at Radio Shack I am going to wire in and mount in an inconspicuous place so in order for it to start I will use the left hand to press the button as I turn the key, that way there will be no connection while the jeep is running and driving triggering the CEL l, and it kind of doubles as an anti theft feature...easily defeated but what kind of car theif in the heat of the moment would suspect a nss bypass button?

 

BTW, if you don't have the tranny yet I was told to get the '94 up for external slave and if you have an '80s model 4x4 mj there may be spline compatability issues between tranny/transfer case. Otherwise its a great swap.

[onlyinajeep726]

Well, I was actually researching this for my XJ if my auto ever takes a dump on me.  But, I am thinking about doing a 4.0 & AX15 swap in my '86 MJ to replace the 2.5 & AX4.  I've been searching craigslist everyday for a '94 - '96 AX15.  I found one tonight that is from a '96 XJ and he claims it worked fine when it was pulled.  No mention of mileage and doesn't have the bellhousing.  Wants $300 for it... Is that reasonable?

[onlyinajeep726]

Also, I have an '88 XJ, so CEL is not a problem lol.

[CRF136N]

Thats exactly what I paid for mine and I knew nothing about it either, was happy to get my hands on one that looked clean so I just made a gamble with it; I thought it was a bit much considering I had to get all the other stuff (hydraulics, clutch kit, flywheel, etc) but whatever. It was 1.5" shorter than my aw4 so if you are lifted consider that for driveshaft length...I had 4.5" lift on my xj, and it grabbed the output by a butt-puckering 1", so I drove very carefully with sandbags in the back for a while to squat the rear and reduce the risk for problems...but then added another 2" lift and put a SYE in so now my xj is stuck until I get a custom driveshaft lol. Turned out to be a good one though; sounds like these are pretty solid transmissions so I wouldnt fret over it too much

[CRF136N]

Oh ya, and I got the bellhousing with mine; not sure how hard/how much that would be...I'd try to get him down in price needing that