4R70W w/ OD

Discussion in 'Engine & Performance' started by jake1, Sep 24, 2013.

  1. jake1

    jake1 Junior Member

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    Help everyone, I seem to be having an issue with my transmission. From a stop everything goes fine, but once I hit about 70 mph in od I cannot remain there on the smallest incline. It will shift between 3rd and od until I reach level road again. I like to run shoot 68-70 that puts me right around 2k rpm. This is running empty no load what so ever. Any input ifs welcome. Thank you

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  2. 07Fx2

    07Fx2 Full Access Member

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    Sounds like it's not a tranny issue but a power problem. How many miles is on your truck and what model/motor?
     
  3. iowaredneck

    iowaredneck Administrator Staff Member

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    We need more info....doesnt sound that uncommon

    sent from area 51
     
  4. 07Fx2

    07Fx2 Full Access Member

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    That's what I'm thinking. If it's a 4.6 it's pretty common haha :3
     
  5. jake1

    jake1 Junior Member

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    Sorry, 95 f150 5.0 with 78k mi.2 wd sc lb.

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  6. ak_cowboy

    ak_cowboy Penguin Hunter

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    When was the last time the fluid was changed?
     
  7. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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    ^^^ This
     
  8. jake1

    jake1 Junior Member

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    Trans was serviced last year with fresh filter and fluid. Less than 5k mi

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  9. Roush PSD Interceptor

    Roush PSD Interceptor Straight Piped Diesel Staff Member

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    Reading about other people with a similar problems:

    Wires at transmission were damaged.
    VSS (Vehicle Speed Sensor) flaky defective (at rear diff)
    may not be sending a steady speed signal in turn telling
    the transmission it needs to shift from OD to third and back and forth.
     
  10. UtahFord

    UtahFord FFS best looking guy

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    What he says ^^ replace your speed sensor see if that helps its about $20 for a new one

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