P0720 Reverse No Forward / Limp Mode

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WhiteFalcon

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May 13, 2016
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Location
Charleston,SC
On my 2005, I changed the fluid one week ago. It was dark but not totally burned. Had about a tablespoon of friction material on the magnet. Yesterday while driving on the freeway it started shifting erratically and then the o/d light started flashing. When I got off, I lost forward and reverse gears and the throttle position sensor warning came on on the dash. I scanned it and have the p0720 code along with a wiring circuit code. Changed the Output speed sensor and got back reverse but it will barely drive in forward gears. I can get to maybe 15 mph and it rumbles feels like it’s slipping. Any ideas of what I can do short of having the transmission rebuilt? Does this sound like and electrical issue? It is weird because this issue came out of nowhere.
 

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