Can you beef up a 5r55s?

[Nemesis]

Is there anyway to beef up the 2007 mustang auto tranny?

 

[RedMOsesSC]

Ive read that 5r55 does not have much room for imporvement because they fit a 5 spd in a 4 speed housing, the issue is the bands are too thin.

Most guys who want to beef things up in a Auto S197 switch to 4R70's.

 

[REAPERRR]

I have seen some things about installing a hardened input shaft, and a few other things.... I advise you to check out an s197 specific forum for some more tech. there are people in the low 11's on the stock tranny with a good tune. higher horsepower guys have been switching to the 4r70w like moses said.

 

[Nemesis]

how about a good tranny cooler any recommendations

 

[zipperhead]

When I was down to JDM this year they has a few cars running in the 10's on stock transmissions. Key here was to make sure they were up to temp when running and they had a overflow pan installed so when they get really hot the fluid doesn't puke on the ground. Problems occur when shifting down from overdrive under high boost. Snaps the input shaft etc

 

[Stangerang]

I have seen some things about installing a hardened input shaft, and a few other things.... I advise you to check out an s197 specific forum for some more tech. there are people in the low 11's on the stock tranny with a good tune. higher horsepower guys have been switching to the 4r70w like moses said.

The auto in the s-197 has gone into the 10s, with no work on the tranny it self. Definitely potential!

 

[Stangerang]

When I was down to JDM this year they has a few cars running in the 10's on stock transmissions. Key here was to make sure they were up to temp when running and they had a overflow pan installed so when they get really hot the fluid doesn't puke on the ground. Problems occur when shifting down from overdrive under high boost. Snaps the input shaft etc

x2. HotRodHarry's s-197 car runs into the 10s with his Stock Tranny, AND stock motor, and a bunch of other stock parts.

His car is also worked by JDM.

 

[Stkjock]

the stock tranny with a converter has run 9s! IIRC they are rated to 550 ft/lbs stock.

yes you can get a built 5r55s, several shops do them.

Level 10
TCI