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Old July 24th, 2014, 07:12 PM
willyc1's Avatar
willyc1 willyc1 is offline

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Cool Tranny Problem

I have a 2005 F-150 4x4 5.4 automatic. It will go into reverse every time I try, it will sometimes go into drive or the other 3 gears, but not always, sometimes it takes going in reverse for awhile then might go into a forward gear, and seems to go into a forward gear if give it some rpm's, Once in a forward gear it goes fine, for example if I can get it going in 2nd I can keep the rpm's up and step on brake to keep it in 2nd. Any ideas out there. I'm new to this site and would appreciate any help. Thanks Willy C. P.S. It shows codes PO720 and P2106

Last edited by willyc1; July 24th, 2014 at 07:17 PM. Reason: added info
Old July 24th, 2014, 09:26 PM
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MR_Pete MR_Pete is offline

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Hi willy, welcome to the club. Sorry to hear about your tranny problems. My next door neighbor is a tech at a local Ford dealership and I intend to try and recruit him into our club. In the mean time, I will bend his ear and see if he has any ideas on whats happening with your truck.

04 FX4 Scab 5.4

God, Guns & Guts made America Free; Let's Fight to Keep all Three

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Old July 25th, 2014, 06:49 AM
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ASwaff400 ASwaff400 is offline

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this is what my search shows up as:

P0720 - Output Speed Sensor Circuit Malfunction


-Check Engine Light will illuminate
-Vehicle will not shift properly
-Decrease in fuel economy
-In unusual cases, there are no adverse conditions noticed by the driver
-In some cases, there may be performance problems, such as dying when coming to a stop after driving on the freeway and/or misfire-like symptoms

Common Problems That Trigger the P0720 Code

-Defective Output Speed Sensor
-Defective Shift Solenoids
-Defective Engine Coolant Temperature Sensor
-Defective Valve Body
-Dirty transmission fluid that restricts the hydraulic passages
-Defective Output Speed Sensor wiring or connector

P2106 - Throttle Actuator Control System - Forced Limited Power

Possible causes
- Throttle actuator control motor is stuck open or closed
- Faulty Throttle actuator control
- Throttle actuator control motor harness is open or shorted
- Throttle actuator control circuit poor electrical connection


'95 F150 XLT, reg cab long bed, swapped 351w,
4.56 gears, 4-link SAS, 14" coil overs.

SAS Thread!!!

'04 F250 Lariat, crew cab short bed 4x4 6.0L PSD, 3.73 gears, straight piped,
sinister coolant filter, welded egr, CAT EC-1 coolant, blue spring.
60 gallon fuel tank/tool box, SCT X4 w/IDP custom tunes, SOON TO BE STUDDED!!

a bunch of boats

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ASwaff400 , BigBlue79 , Booba5185 , glc , MR_Pete , OffRoadBum , Sydney , willyc1

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