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Discussion Starter #1 (Edited)
I have a 04 lly with 85,000 thousand miles on it, i have put a 3 disc torque converrter, afe cold air intake, a diablo predator programmer and, a 4 inch magnaflow. how do i fix the tcm error?
 

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Are you getting codes from the TCM? If so, need them to help diagnose your problem. What converter did you put in?
 

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Discussion Starter #3
its a daaco convertor i thought that would fix the problem after i put it in but it still does the same thing. who can diagnose that problem?
 

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Discussion Starter #5
when im in overdrive and i go to accelerate it will down shift and stick in gear
i geuss this is what you call limp mode.
 

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sounds like you need to upgrade the clutches too. Your question is vague at best though. What codes you have?
 
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