will old fluid make trans buck an***** while shifting down got trouble code P0740
May 31, 2011 at 3:36 PM
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F4I_GUY
CAR REPAIR CONTRIBUTOR
3,302 POSTS
Old/low fluid could play some part in your transmission problems. But your code is for your torque converter clutch circuit. Make sure your fluid is good, and then test the TCC circuit.