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Author Topic: Can I use a trans. other then the 904/727 in my 2wd Concord?  (Read 2289 times)

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Offline shaggimo

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Re: Can I use a trans. other then the 904/727 in my 2wd Concord?
« Reply #15 on: July 11, 2012, 07:58:25 AM »
No prob, and I think that's where I made my mistake as my reverse lamps do not work, lol. ah another "micro" project for me. What year did you source your parts from, or did you get a whole donor jeep?
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81 malibu 4dr- Identity Crisis
81 SX4- gf's
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Offline eaglefreek

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Re: Can I use a trans. other then the 904/727 in my 2wd Concord?
« Reply #16 on: July 11, 2012, 08:38:29 AM »
I went to the Junkyard and cut the transmission harness and TCU from a 95 XJ. I bought an AW4 from Strike Eagle, but it is from a 2000 XJ. So I have to install an earlier extension housing, output speed sensor and rotor from a 91-96 XJ and either install the TRS (transmission range sensor) connector from the earlier years or install a whole TRS from a 91-96.  I'm going to do a write up when it is all said and done to help others who may want to do it. I've spent quite a few hours going over all the information and misinformation on the net. I absolutely do not want a box that I have to keep switching to change gears. Engineers have spent a multitude of hours to figure out how to control the transmission and it doesn't make sense to me to negate that with some toggle switches.
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Offline 1982AMCCONCORD

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Re: Can I use a trans. other then the 904/727 in my 2wd Concord?
« Reply #17 on: July 12, 2012, 12:25:42 PM »
Wow... you guys have really taken this to another level!!!! Congrats!

Offline shaggimo

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Re: Can I use a trans. other then the 904/727 in my 2wd Concord?
« Reply #18 on: July 12, 2012, 12:41:55 PM »
I went to the Junkyard and cut the transmission harness and TCU from a 95 XJ. I bought an AW4 from Strike Eagle, but it is from a 2000 XJ. So I have to install an earlier extension housing, output speed sensor and rotor from a 91-96 XJ and either install the TRS (transmission range sensor) connector from the earlier years or install a whole TRS from a 91-96.  I'm going to do a write up when it is all said and done to help others who may want to do it. I've spent quite a few hours going over all the information and misinformation on the net. I absolutely do not want a box that I have to keep switching to change gears. Engineers have spent a multitude of hours to figure out how to control the transmission and it doesn't make sense to me to negate that with some toggle switches.

Very cool, that's why your diagram looked odd to me, lol, I've only tore into a Renix harness (PITA I might add). What have you planned to address the electronic speedo that those have? I know there's companies out there that offer a converter box, but kinda pricey, maybe you have another trick up your sleeve for that? (or are you using the stock t-case) Eventually, the sx/4 will likely get an aw4 as well, the jeep was my experiment to see if it was within my capabilities to make work. When I go about it, I plan on using another renix version for the swap (the electronics anyway), that way I can retain a mechanical speedo.  I'll be watching for the write up  :occasion14: .
88 xj cherokee- ((4)(4))2
81 malibu 4dr- Identity Crisis
81 SX4- gf's
84 Eagle 4dr sedan- it followed me home... ::)
http://www.cardomain.com/id/Oldsmoletic
CNY

Offline eaglefreek

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Re: Can I use a trans. other then the 904/727 in my 2wd Concord?
« Reply #19 on: July 12, 2012, 01:33:19 PM »
I believe 87-95 use the same connectors and the transmission harness should be the same. I'll confirm that at the junkyard next week. The speedo is on the transfer case and doesn't come into play on a 4wd. The AW4 doesn't use any VSS info, only the engine computer. The transmission gets it's speed info from the rear output speed sensor that is on the tailshaft of the transmission. The only difference that I could find from the Renix to the the HO TCU is that the Renix sends 5v through pin D1 to the TPS. The Renix engine computer uses a TPS signal that is backwards, so on the Renix throttle body you will have a dual TPS. One for the engine computer and one for the transmission computer. The one for the transmission sends info just like the later HO TPS, so Jeep just tapped into a single TPS on the HO and deleted the 5v source from pin D1 on the TCU. So doing this with a carbed engine it is best to use the Renix TCU, otherwise you will have to have a 5v stepdown regulator to supply 5v to the TPS. But those are only about $10-$15.  
« Last Edit: July 12, 2012, 01:35:20 PM by eaglefreek »
"I know he'd be a poorer man if he never saw an eagle fly,
Rocky mountain high"  John Denver
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