Eagle Posted February 7, 2017 Share Posted February 7, 2017 I have an '88 2.5L, 4-speed, 2WD Comanche. I'm undecided between replacing the 2.5L engine with a low-mileage rebuilt and a 5-speed, or converting to an AW4 with the engine job. I have the AW4 and a 2.5L bellhousing and torque converter. I don't have a 2.5L TCU. Is there a difference? Can I use a 4.0L TCU with a 2.5L? Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 7, 2017 Share Posted February 7, 2017 The TCU doesn't care what the engine is. But I don't know if the harness for your 88 2WD w. manual transmission has the TCU connector built-in. Also, the TCU had slight pinout variations over the years. Link to comment Share on other sites More sharing options...
Eagle Posted February 8, 2017 Author Share Posted February 8, 2017 The TCU doesn't care what the engine is. But I don't know if the harness for your 88 2WD w. manual transmission has the TCU connector built-in. Also, the TCU had slight pinout variations over the years. I have parts heaps -- an 87 4.0L auto, and an '89 4.0L auto. And I have the electrical manual and a soldering gun ... Frank Swygert, a retired AMC engineer who was active on the OLD old XJ bulletin board (the predecessor to NAXJA) had a 4.0L with AW4 running in an AMC Hornet. He controlled the tranny manually, with a 6-position rotary switch connected to the individual solenoids. Anything is possible. Link to comment Share on other sites More sharing options...
strictlyxjs Posted February 8, 2017 Share Posted February 8, 2017 have you seen thd manual shifter from rad designs? http://www.radesignsproducts.com/rail-controller.html Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 8, 2017 Share Posted February 8, 2017 I have parts heaps -- an 87 4.0L auto, and an '89 4.0L auto. And I have the electrical manual and a soldering gun ... Frank Swygert, a retired AMC engineer who was active on the OLD old XJ bulletin board (the predecessor to NAXJA) had a 4.0L with AW4 running in an AMC Hornet. He controlled the tranny manually, with a 6-position rotary switch connected to the individual solenoids. Anything is possible. I remember Frank well. Very sharp guy. Passed many emails back and forth with him picking his brain when I had questions. He always had the time and the answers. Is he still around? Link to comment Share on other sites More sharing options...
johnj92131 Posted February 8, 2017 Share Posted February 8, 2017 Frank was doing an AMC subscription newsletter a few years ago. A good information resource. I got it for a couple of years, then dropped it when I joined jeepstrokers. Pete, I assume you are aware of the manual shift AW4 options that are out there. Link to comment Share on other sites More sharing options...
Eagle Posted February 8, 2017 Author Share Posted February 8, 2017 I have parts heaps -- an 87 4.0L auto, and an '89 4.0L auto. And I have the electrical manual and a soldering gun ... Frank Swygert, a retired AMC engineer who was active on the OLD old XJ bulletin board (the predecessor to NAXJA) had a 4.0L with AW4 running in an AMC Hornet. He controlled the tranny manually, with a 6-position rotary switch connected to the individual solenoids. Anything is possible. I remember Frank well. Very sharp guy. Passed many emails back and forth with him picking his brain when I had questions. He always had the time and the answers. Is he still around? Profile updated August of 2016: http://www.zoominfo.com/p/Frank-Swygert/49380515 Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 8, 2017 Share Posted February 8, 2017 I have parts heaps -- an 87 4.0L auto, and an '89 4.0L auto. And I have the electrical manual and a soldering gun ... Frank Swygert, a retired AMC engineer who was active on the OLD old XJ bulletin board (the predecessor to NAXJA) had a 4.0L with AW4 running in an AMC Hornet. He controlled the tranny manually, with a 6-position rotary switch connected to the individual solenoids. Anything is possible. I remember Frank well. Very sharp guy. Passed many emails back and forth with him picking his brain when I had questions. He always had the time and the answers. Is he still around? Profile updated August of 2016: http://www.zoominfo.com/p/Frank-Swygert/49380515 Guess he's AMC retired. http://www.amc-mag.com/ Link to comment Share on other sites More sharing options...
johnj92131 Posted February 8, 2017 Share Posted February 8, 2017 Well, found he is still posting on theamcforum.com Link to comment Share on other sites More sharing options...
Eagle Posted February 9, 2017 Author Share Posted February 9, 2017 I thought I remembered that he was a retired AMC engineer, but his profile/bio says he retired from the Air Force. Wrong again, eagle -- that's at least twice this year, and it's barely more than a month old. Link to comment Share on other sites More sharing options...
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