2007 Mustang GT auto Transmission
07-23-2010, 11:03 PM
#22
2nd Gear Member
Join Date: Apr 2006
Location:
Posts: 298
Yes I've read over the years that these automatics are bulletproof and can handle a LOT of torque. I wouldn't worry about the transmission or engine in this car. the base model on the other hand, I met a guy who drove it normal on commute and broke his OHC without overdoing it while doing his daily driving. tranny was fine though.
07-24-2010, 11:57 AM
#23
5th Gear Member
Join Date: May 2007
Location: Central Texas
Posts: 2,388
Your results will vary. Just recently a guy locally blew his tranny with a stock setup. Rare, sure, but it happens.
The 5R55S is "rated" to 550 hp. HOWEVER, there are several significant weak parts that affect its life. Mostly, the 2 servos (intermediate and overdrive) are not designed to stand up to a lot of abuse, and will wear out (and cause bands to wear quickly). TCI makes a nice set of upgraded servo kits for these, as does Level 10.
Also, the input shaft is a little weak with higher-power applications; a hardened input shaft solves that as well.
Good cooling and good fluid are crucial as well.
Lastly and very important is a good tune. There's a lot that goes on during shifts with these trannys, and someone who understands how to properly tune them can mean the difference in one lasting a week vs. years.
Whether you need any upgrades will depend on the power you are putting through it of course.
Here's a couple pics of parts I put in mine, but then again, I'll be putting over 500 to it very soon.
One of the servo kits:
Hardened input shaft:
The 5R55S is "rated" to 550 hp. HOWEVER, there are several significant weak parts that affect its life. Mostly, the 2 servos (intermediate and overdrive) are not designed to stand up to a lot of abuse, and will wear out (and cause bands to wear quickly). TCI makes a nice set of upgraded servo kits for these, as does Level 10.
Also, the input shaft is a little weak with higher-power applications; a hardened input shaft solves that as well.
Good cooling and good fluid are crucial as well.
Lastly and very important is a good tune. There's a lot that goes on during shifts with these trannys, and someone who understands how to properly tune them can mean the difference in one lasting a week vs. years.
Whether you need any upgrades will depend on the power you are putting through it of course.
Here's a couple pics of parts I put in mine, but then again, I'll be putting over 500 to it very soon.
One of the servo kits:
Hardened input shaft:
07-25-2010, 03:18 AM
#24
6th Gear Member
Join Date: Jan 2008
Location: North Pole
Posts: 6,716
^^
nice.. I plan on taking apart my auto trans this coming semester (Ford Assets program), and adding the level 10 clutch pack and upgraded input shaft..
sure beats a ton of money to get it done. I seen this old timer rebuild a subaru auto trans like it was a simple puzzle lol Amazing what years of experience teaches you!
nice.. I plan on taking apart my auto trans this coming semester (Ford Assets program), and adding the level 10 clutch pack and upgraded input shaft..
sure beats a ton of money to get it done. I seen this old timer rebuild a subaru auto trans like it was a simple puzzle lol Amazing what years of experience teaches you!
11-05-2011, 09:36 PM
#26
Join Date: Jul 2010
Location: USA
Posts: 2
I'm not finding that part anywhere MBT Meli Tan online, but that's not to say it doesn't exist. I may have to take it in. What do you recommend - transmission shop or dealership???
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