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Hey guys! New here on the forum as I just picked up a 1990 Trooper V6 auto trans with the l430e. Got it for 600 with the infamous “Check Trans” blinking light. Thought I would start with the transmission control module as it seems to have helped others in the past. Wondering if anyone has one lying around in a parts car that I could buy? Runs like a dream just gotta sort out this transmission problem. If this post is in the wrong thread let me know. Thanks in advance!
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A Flashing Check Trans lamp indicates the TCM has detected a 4L30e transmission anomaly. Replacing the TCM is not likely to fix the problem imho. Run the TCM flash code diagnostic to get the transmission Diagnostic Failure Code (DTC) number and troubleshoot that.
 
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