4L60 stuck in Limp mode - The 1947 - Present Chevrolet & GMC Truck Message Board Network

FL72GMC · 03-04-2019, 09:40 AM

Just completed my 2002 5.3 / 4L60 swap into my 72 GMC and the trans seems to be stuck in limp mode. Reverse and 2nd, 3rd while in drive. I have power to the trans but no error codes to the computer. I have not hooked up the TCC but I don't think that would put it in limp mode. Fluid is good and I everything is hooked up correctly. Any suggestions? I am at the point of sending the computer to be programmed to see if the issue is there. I would think I should get some error from the trans if there is a problem.

03-04-2019, 09:40 AM	#1
FL72GMC Registered User Join Date: Sep 2018 Location: Cocoa Beach, FL Posts: 12	4L60 stuck in Limp mode Just completed my 2002 5.3 / 4L60 swap into my 72 GMC and the trans seems to be stuck in limp mode. Reverse and 2nd, 3rd while in drive. I have power to the trans but no error codes to the computer. I have not hooked up the TCC but I don't think that would put it in limp mode. Fluid is good and I everything is hooked up correctly. Any suggestions? I am at the point of sending the computer to be programmed to see if the issue is there. I would think I should get some error from the trans if there is a problem.

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