5r55s

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...

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...

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...

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...

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...

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...

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...

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

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...