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very bad transmission problem

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Old 05-20-2014, 12:46 AM
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Default very bad transmission problem
Hello all. I recently purchased a 99 f150 4.6 4x4 auto extended cab. It had a bad transmission. Replaced the tranny with one from a 98 that I know is good. Got it all back together and took for a drive. Runs and drives great in first gear. In drive as it shifted in to 2 gear....it felt like it locked right up or like it was slammed into reverse. I quickly threw it into neutral.

No clue what is going on. Need some ideas. Any help would be greatly appreciated. Thanks
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Old 05-20-2014, 02:22 AM
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OMG! It's just a faulty TPS sensor or Connector
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Old 05-20-2014, 08:25 AM
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Originally Posted by w0lvez
OMG! It's just a faulty TPS sensor or Connector
This made me chuckle. .
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Old 05-20-2014, 09:22 AM
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Sounds like you used an e4OD instead of a 4r70w.
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Old 05-20-2014, 10:05 AM
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Originally Posted by w0lvez
OMG! It's just a faulty TPS sensor or Connector
What is the tps? Another sensor of tranny? Not throttle position sensor?
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Old 05-20-2014, 10:06 AM
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Originally Posted by '95flareside
Sounds like you used an e4OD instead of a 4r70w.
It's a 4r70w. Took it out of my 98
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Old 05-20-2014, 10:28 AM
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Originally Posted by yeahford
What is the tps? Another sensor of tranny? Not throttle position sensor?
Throttle Position Sensor
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Old 05-20-2014, 10:34 AM
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Originally Posted by w0lvez
Throttle Position Sensor
Should I just swap the one from my 98 and clean the plugs? I didn't know that the tps could cause craziness like that
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Old 05-20-2014, 10:41 AM
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Yeah, you need an impact screw driver to remove the screw without damage. A Vise Grip will also work but will damage the screw.

Much easier if you have Multimeter.
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Old 05-20-2014, 02:36 PM
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Originally Posted by w0lvez
Yeah, you need an impact screw driver to remove the screw without damage. A Vise Grip will also work but will damage the screw.

Much easier if you have Multimeter.
Is it worth testing? What else could cause the issue I'm having? Or do you mean test reference and ground
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