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5R55w Servo fix

Discussion in 'Transmissions & Transfer Cases' started by Cb747, September 10, 2017.


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    1. Cb747

      Cb747 New Member

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      Hi I installed the servo fix into the INT servo. I definitely notice an improvement but not 100% Still slips a bit between 2nd and 3rd if I accelerate hard. If I drive it without a heavy foot it shifts fine for the first time sense I've owned the truck so that's a definite improvement! I have not done the OD servo yet. What symptoms would just a bad OD servo bore cause? Thank you for the help in advance :)
       
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    3. BrooklynBay

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

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    4. Cb747

      Cb747 New Member

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      The servo with the O rings
       
    5. BrooklynBay

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

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    6. Cb747

      Cb747 New Member

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      I am going to do both. I have the OD servo already. :) Just ran out of time today so took the truck for a drive and was wondering what a bad OD servo will cause?
       
    7. BrooklynBay

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

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    8. Cb747

      Cb747 New Member

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      Ok thank you BrooklynBay ill do the OD probably next weekend. :)
       
    9. JK080

      JK080 Transmission Moderator Staff Member Moderator Elite Explorer

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      The OD band is for second and fifth gears for this transmission, the intermediate servo is for third. The OD servo wears out faster than the intermediate one and most of the time its the reason for most shift complaints. The servos with the o rings do work but the worn bore can cause any servo to bind and sometimes break off.but they are really your only option short of rebuilding the transmission and sleeving both servo bores.
       
    10. CarlosHRNYC

      CarlosHRNYC New Member

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      Hey BrooklynBay... I just swapped my servos last weekend with the ones with the orings. I still notice the shift flare going from 1 to 2 although when I now let off the gas, it engages much softer than before when I felt a hard jolt. I did readjust the bands but I did 1.5 turns (that's what was on the instructions) instead of the 2 that I'm reading everywhere else.

      Do you think I should retorque and open each with 2 turns this time?

      I'm still waiting for feedback from Andy Wanie but wanted to get your 2 cents since you seem to have extensive knowledge on this issue...
       
    11. BrooklynBay

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

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    12. CarlosHRNYC

      CarlosHRNYC New Member

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      Hey Bruce,

      Did the adjustment, 2 turns and still experiencing flare. Before I did that, I went ahead and dropped the pan, changed the filter and put in 6 quarts of fresh Mercon V. The fluid I drained was dark, not black, and did not smell burned. There wasn't much on the magnet other than the usual sludge but no metal pieces in the pan to be alarmed about.

      Not sure what to do now. Should I take out the OD servo and re-install with a new set of o-rings?

      Considering the flare is much softer than before swapping out the servos, I want to think this is heading at the right direction. Seems as if I hit a wall here.

      Thanks
       
    13. BrooklynBay

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

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      Check the hydraulic pressure at the main port then on the EPC port in each gear range with a 0 - 300 PSI test gauge. Solenoid blocks have high wear components such as the EPC & TCC solenoids which aren't individually replaceable. They are replaced as a single unit by replacing the entire solenoid block. Are any codes present?
       
    14. CarlosHRNYC

      CarlosHRNYC New Member

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      P0775
       

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