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  #1  
Old 07-19-2009, 10:09 AM
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funky shift

so i do the shirt kit and all is well after disconnecting the battery for 20 minutes. Yesterday I do the IDM mod. The truck runs fine but when the truck starts and put into drive the first time it will hold first a long time then the rpms will drop then rev then drop then shift. After the first time it will shift like normal until it is shut down and restarted then the process starts again. Disconnecting the battery is my first move today. Any suggestions would be welcomed.
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Old 07-19-2009, 10:13 AM
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could be your TC messin up......could just be low on fluid.....could be a shift syliniod clogged???? not sure on that but in chevys it happens.....


so id say check your tranny fluid level....
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Old 07-19-2009, 10:20 AM
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fluid checked out fine. tranny was rebuilt 15k ago I had no issues until the IDM mod. Does the idm effect tranny performance?
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Old 07-19-2009, 10:22 AM
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couldnt honestly tell you.....idk any thing about the electronics of the auto haha.....just type in idm in the search box and see what posts come up about it....
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Old 07-19-2009, 10:24 AM
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ok never mind scratch that idea it didnt work i tried.....
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Old 07-20-2009, 06:43 PM
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Sooooo.... I called a buddy in Reading. I told him I did the IDM mod and he did a little research for me today. Local tranny shop told him the IDM has alot to do with trans shifts. Looks like new IDM for me. The wife is not happy

Any body got a spare IDM-100 they would part with?
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Old 07-22-2009, 02:09 PM
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Found a junkyard idm and swapped them out. Shifting is back to normal. Johnathan at Swamps said idm should not effect the trans. So I am going to swap the modded idm back in to see if that is the problem.
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Old 08-09-2009, 07:23 PM
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DId you find the problem? I have the same problem with mine, but I didn't do anything to cause it.
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