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jorgensensc · 07-15-2013, 04:52 PM

Thanks for the advice. I checked the fuses one more time. They are all good. As an experiment I pulled the fuse for the tranny, then I drove it around the block. Only ha third gear. Then I put the fuses back in. I only had first gear. This seems to validate the two things I have been told about these trannies.
1) When the tranny has no power, it goes in limp mode, third gear only.
2) The 2008 Ecm is not communicating correctly with the 2011 TCM (different operating systems) So the tranny is functioning correctly, but the ECM isn't telling it when to shift, therefore it stays in first gear.
We will see when the new 2011 ECM gets here.

07-15-2013, 04:52 PM	#57
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: She won't fire up. Please help me! I"m at a complete loss! Thanks for the advice. I checked the fuses one more time. They are all good. As an experiment I pulled the fuse for the tranny, then I drove it around the block. Only ha third gear. Then I put the fuses back in. I only had first gear. This seems to validate the two things I have been told about these trannies. 1) When the tranny has no power, it goes in limp mode, third gear only. 2) The 2008 Ecm is not communicating correctly with the 2011 TCM (different operating systems) So the tranny is functioning correctly, but the ECM isn't telling it when to shift, therefore it stays in first gear. We will see when the new 2011 ECM gets here. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE