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slipping transmission

Discussion in '2001-2005 Explorer Sport Trac' started by kmartin, January 12, 2019.

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    1. kmartin

      kmartin Member

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      I just notice it this week. 2004 Sport Trac 102,300 miles. When I do a light acceleration at about 2000 rpm the transmission will slip. It will do it for a little bit soon after your driving and then function like normal.
       
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    3. domct203

      domct203 Pilots The Beast Elite Explorer

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      Is this always in the same gear/MPH, or is it every gear at 2000 RPM?

      Regardless, slipping transmissions usually get worse, not better. Any transmission fluid leaks? When was the last time the transmission pan was dropped for a filter & fluid change?
       
    4. kmartin

      kmartin Member

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      First time it happened, I was going around slight turns in a road at around 40-45 mph and slightly pushing on accelerator to bring up to speed. Did it for a little bit. Second time, I was pulling out going up to speed. Both times it happened soon after I started driving and it all happened within a week. Transmission flush was done at around 46,000 miles. Fluid is still red the last I checked. So basically this means a tranny rebuilt?
       
    5. boominXplorer

      boominXplorer Elite Ranger Elite Explorer

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      Sure you have enough fluid in it? Level has to be checked when engine is running in park.
       
    6. domct203

      domct203 Pilots The Beast Elite Explorer

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      Also, make sure the transmission is at its operating temp when checking fluid level. I’ll usually drive around for 15 min or so first.

      If this is a 5R55 series transmission it could be a worn intermediate servo bore. This could be a 2nd to 3rd shift flare you are experiencing. If that is the case, there is a semi-permanent fix that can be done without removing the transmission.

      Ford Lincoln Mercury Explorer Mountaineer Navigator Servo Bore Fix

      How many miles do you have on the vehicle?
       
      Last edited: January 13, 2019
    7. kmartin

      kmartin Member

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      102,300 miles. No leaks that I know of. Need to go check the level. Didn't see the OD light flash yet
       
    8. david4451

      david4451 Active Member

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      Have you adjusted the bands? There are two bolts with lock nuts on them on transmission, drivers side under truck. Search for how to do this.
       
    9. Paul Fithian

      Paul Fithian Elite Explorer

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    10. kmartin

      kmartin Member

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      Thanks for the replies. I won't be attempting to do a lot of these suggestion. I am going to be in contact with some transmission shops, but I have a feeling they aren't going to suggests anything short of a rebuilt. Never heard of adjusting bands.
       
    11. david4451

      david4451 Active Member

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      Search for '5r55e band adjustment'. If it's your shop that hasn't heard of this find another shop!
       
    12. domct203

      domct203 Pilots The Beast Elite Explorer

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      +1

      If after band adjustment has been checked you experience RPM flares between gears/during shifts it is most likely worn servo bores, which is a relatively quick and easy fix with the transmission in the vehicle.

      If the transmission is slipping while in a gear, that’s another story, and most likely internal.
       
    13. kmartin

      kmartin Member

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      If the transmission is slipping while in a gear, that’s another story, and most likely internal.
      Would this mean a rebuilt/remanufactured job?
       
    14. domct203

      domct203 Pilots The Beast Elite Explorer

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      Depends on the root cause. It could be a valve body, or It could be a worn band, and so on.

      That determination would take a mechanic who works on transmissions, not one who just installs them.
       
    15. boominXplorer

      boominXplorer Elite Ranger Elite Explorer

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      Have you checked the fluid? What's it look like?
       
    16. kmartin

      kmartin Member

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      Yes I have. It is red. Crawled under to verify no leaks. No leaks.
       
    17. kmartin

      kmartin Member

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      Check engine light came on yesterday for same issue and pulled a code. One code and P0193 is it. Looks like not a tranny issue.
       
    18. Turdle

      Turdle Has Pleasure Chamber Staff Member Moderator Elite Explorer

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      Are you sure it wasn't p1903?
      ( kickdown solenoid low voltage)

      OBD-II Diagnostic Trouble Codes (DTCs)

      I'm not sure our vehicles have a sensor to log a P0193 ( low fuel pressure sensor) code but I could be mistaken.
       
    19. boominXplorer

      boominXplorer Elite Ranger Elite Explorer

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      Yes job 2 Sport Trac starting in 02 got the fuel temp/pressure sensor as well as flex fuel capability
       

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