Jdiesel25 Posted August 15, 2014 Share Posted August 15, 2014 Anyone know what this fault code is? Push d and the 6 just flashes and trans won't engage. ThanksIt's a 2012 Mack granite Quote Link to comment https://www.bigmacktrucks.com/topic/36699-fault-code-29-on-allison-4500-trans/ Share on other sites More sharing options...
Fran3682821 Posted August 31, 2014 Share Posted August 31, 2014 It happened to a friend of mine it was. A bad connection on the plug from the controller on the dash and the wire going to the transmission. It was where it plugged on the transmission. Quote Link to comment https://www.bigmacktrucks.com/topic/36699-fault-code-29-on-allison-4500-trans/#findComment-258019 Share on other sites More sharing options...
b61mack Posted August 31, 2014 Share Posted August 31, 2014 AT work ( county highway dept.) we have 6 2007 Internationals 7600 with the 4000 Allison auto, we have had more trouble with wiring going to the transmission than anything else. every year they are looking for bad spots in the wiring because it throws codes or wont move PITA. Quote Link to comment https://www.bigmacktrucks.com/topic/36699-fault-code-29-on-allison-4500-trans/#findComment-258036 Share on other sites More sharing options...
bbigrig Posted September 3, 2014 Share Posted September 3, 2014 I work on Toronto transit buses as well. We go through Allison harness like crazy. We don't even repair them anymore. The loom wears through the coating on the wires. We repair them in one section and 6 months later the break in another. Its been that way since the early 2000's with those cheap harness. Same trans 4000 series. Quote Link to comment https://www.bigmacktrucks.com/topic/36699-fault-code-29-on-allison-4500-trans/#findComment-258397 Share on other sites More sharing options...
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