5r55s

  1. O

    Transmission Alignment Help

    I’m currently replacing the 5r55s transmission in my 2007 V6 and I didn’t have any issues getting the old one out but when I jack the new transmission into place I can’t seem to get the torque converter studs to line up and seat into the flex plate. I can get close enough to touch the flex plate...
  2. C

    5r55s issue?

    I recently replaced the solenoid pack and valve body on my 08 auto 4L only for it to give me a code for the intermediate shaft speed happened to have a spare parts transmission laying around so i pulled a sensor out of that to test if it was a bad sensor cause i didnt want to reopen the tranny...
  3. metrolink

    5R55S – Lost Reverse and Drive, 1-2-3 Still Work – Likey Not the Sprag

    Hey everyone, I need some advice. I've got a 2006 Mustang GT 4.6 with the 5R55S auto trans. After accelerating to merge on the highway, I suddenly lost both Drive and Reverse — car felt like it slipped into neutral. No movement in D or R, just revs. I was able to drive it home using 1, 2, and 3...
  4. rawdawg

    Transmission Swap

    The 5R55S finally bit the dust in my 08 Stage 3 Roush and I have a T56 Magnum XL on the way. Do I need the engine wiring harness from a manual or can I splice in new connectors to the Automatic harness?
  5. wiseguy83

    5r55s Suggestion

    Hello, New here and haven't browsed message boards since I sold my 87 Thunderbird about 15 years ago (almost did the HO swap, timing chain grenaded, and then I bought the Mustang.) I've got a 07 Mustang GT with getting close to 190k on it, had it since new. Recently, and unsurprisingly, it's...
  6. K

    5r55s issues

    To begin, i have an 06 GT deluxe. I recently did a trans filter change and replaced the trans fluid that i lost when doing so. Afterwards when i went to start my car it would not start. my anti theft was flashing when trying to start my vehicle in park. so i had my buddy unplug my...
  7. T

    Auto to Manual tune file

    So is it as simple as getting a stock tune file from a factory manual car of the same year and overwriting that into my car over the current tune file? If that makes sense. Or is it more complicated than that? Its getting awfully close to spring and all I need for my car now is the tune file for...
  8. T

    Electrical help on 5r55s harness to Tr3650

    2010 Gt swapping the 5r55s to a Tr3650 and keeping the auto harness. I was following the guide that Anthony05GT made on the Stangnet forum and I had to stop at the part where he was saying which colored wires to cut and solder. On the big round 12 wire plug that inserts into the transmission and...
  9. T

    New tune after 5R55S to TR3650 swap

    Im gonna be starting my manual swap soon and am very excited. I know mechanically I can get it all functioning fine. My questions arise when it comes to the electronic side. Ive seen most the old posts of these swaps and the good details in them. My car is a 2010 GT (auto) and I got a donor...
  10. S

    08 Stroker 3v need 8 hole flexplate

    I need advice for an 8 hole SFI flexplate for my 08 stroked 3V with a 5R55S automatic trans. None are listed since the 3v all had 6 hole stock cranks. Going with a Hughes stall converter. Will any of the 8 hole internal balanced flexplates for earlier, or later year mod motors work? Please advise...
  11. D

    Transmission help

    I have a 2006 gt auto 5R55S, needs new trans. Why are the sites showing that 2008 5R55S is not interchangable with a 2006 Mustang GT. It seems there is a difference pre 2/6/2007 and post but cannot seem to find whats the different. I thought the transmission was the same 2005 -2009? has anyone...
  12. N

    built or r6w80 automatic transmisson for 2010 GT

    looking to make 650rwhp in my 2010 gt. I was told I should swap my 5r with a r6w80 or should I just go the built transmission route. going either way could someone point me in the right direction as to how to swap and what all I am going to need to do the swap. thanks
  13. M

    Solenoid Pack replacement 4L2P with 1L2P

    Hello guys, I need to replace the solenoid pack of my mustang v6 2005. The part number I removed from the car is the 4L2P-7G391-AA, i ordered on ebay a replacement and i got the 1L2P 7G391 AF. The seller says that i can use that without any problem, but i dont want to screw my car. Do you know...

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