amailloux Posted April 29, 2014 Share Posted April 29, 2014 I have a few trucks in a fleet with a harsh 1-2 shift, and harsh 3-2 downshift. All others are ok including 6th gear. There are a couple 450s including 1 in my bay that really bang. I replaced a main control body and repaired 1. I have done the adaptive drive a few times, and they seem to come back with a harsh 1-2 and 3-2 only. I see solenoids are available as long as they are matched, but having a good 5-6 leads me to think the solenoid must be ok. I have not removed the valve body. Anyone else seeing a harsh 1-2 only. 1 Quote Link to comment Share on other sites More sharing options...
amailloux Posted May 1, 2014 Author Share Posted May 1, 2014 Well, I put the latest software in, cleared TCM KAM, and adaptive tables, and got her hot. Performed the adaptive drive and now 2nd is extremely harsh and 6th is harsh as well. So I replaced the 2-6 solenoid and went through the KAM reset, adaptive reset, and adaptive drive and she shifts like butter. It looks like I will be replacing a few more, as they come in for service. 1 Quote Link to comment Share on other sites More sharing options...
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