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Solenoid Block Replacement

Discussion in 'Transmissions & Transfer Cases' started by tmeraw, December 11, 2007.


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    1. tmeraw

      tmeraw New Member

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      City, State:
      Victor,NY
      Year, Model & Trim Level:
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      I need some expert opinions: I have a 2003 Explorer XLT 4wd 4.0l ohc and believe after reading for hours and hours on this forum that I need to replace the Solenoid Block. I believe that my trani is a 5r55w(agreed?). I found a guy selling new solenoid blocks on e-bay for $100 which is a good deal if it is the proper one. Dealer told me part number was 4L2Z-7G391-AA but this one is listed as 1L2Z-7G391-AE (see listing:
      http://cgi.ebay.com/ebaymotors/02-0...013QQitemZ230202156786QQrdZ1QQsspagenameZWDVW

      Is this the right part for my truck?

      Thanks,
      Tim
       
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    3. btexpress

      btexpress Active Member

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      Do you have a solenoid code directing you to replace the solenoid pack? Just wondering why you would come to this conclusion
       
    4. tmeraw

      tmeraw New Member

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      No I do not have a code but based on my symptoms and what I have read I believe that this is the fix. It is a long sad story about how all my problems started when I had a simple filter and gasket replacement at a local AAMCO..I won't go into it now.

      The problem is when the trani and vehicle are cold it will not easily go into reverse or Drive from Park and if still cold will slip from D into Neutral when sitting at a light. The gear can be slowly engaged by a quick feather of the throttle bring RPM's up to the 2-3k range and it feels just like letting a clutch out. Once it is well warmed up there is no noticeable problem. I think it is the EPC solenoid so a block replacement is in order.

      If anyone thinks I am wrong or it could be something else I'm all ears...short of a rebuilt trani that AAMCO is offering for $1800...minus the parts and labor they spent creating my problem of course.
       
    5. BrooklynBay

      BrooklynBay Moderator & long time member. Staff Member Moderator Elite Explorer

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    6. Jack Flash

      Jack Flash Active Member

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      wow, thanks for that link, Brooklyn. I spent about an hour looking at it.

      I think I'll wait before tackling one of those. looks like some 'spensive parts inside that baby ! **

      .....jjf

      ** not going to find many of those in the discard pile to rob parts from..... :)
       
    7. Quagmark

      Quagmark New Member

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      That link doesn't seem to be active anymore. Was it instructions on how to do the solenoid block swap? I have a 2003 Explorer with the P0775 code and am about to do that swap, some instruction would be great.

      Thanks,
      Mark
       
    8. BrooklynBay

      BrooklynBay Moderator & long time member. Staff Member Moderator Elite Explorer

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    9. MROSARIO1127

      MROSARIO1127 New Member

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      I have a 2003 ford explorer with a fault code PO775. The O/D light keeps coming on and off and the need service soon light is on. It seems there is pressure control problem when I am shifting gears. Do I need a new solenoid block and can I repair it my self.
      Thanks,
      Jersey guy
       
    10. BrooklynBay

      BrooklynBay Moderator & long time member. Staff Member Moderator Elite Explorer

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    11. Quagmark

      Quagmark New Member

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      I replaced the solenoid block and did a band adjustment and it didn't fix mine. It's probably the servo bore on mine. I sent it to the transmission shop for a rebuild. The servo bore seems to be a very common problem on vehicles with more than 70,000 miles that have the 5R55W trans. Sorry.

      Mark
       

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