cfr865

Iagree with hiroller 100 %, I've asked this questionon another forum , serveral people have chimed in with a/t and s/c with now problems with many runs, and some alot more then450 rwhp.

stangoil

when ford dealer put my supercharger they told me that the stock torque converter sould be changed as well as staying under 10 psi boost. they have been great the dealer has said from day one if don't exceed their recomended upgrades they will cover all failure due to mechanical failure they now puting cams and spring in the car 539 hp and nevera problem FIND A GOOD DEALERSHIP AND STICK WITH THEM!!!!

zkiller

here is a quote from another forum from someone else who has had their automatic die.

I think Sidmanic also had his tranny die.

cfr865

Update; Mine tranny died at 1500 miles 4 runs at the track and some hard street driving 455 rwhp.Dealer said these trannys can't handle this kind of power. Brent at Brenspeed broke his 3 gear band. My tranny got hot for some reason, I'm getting the deep dish pan from Brenspeed, dealer said this should help some. If I had to do it over I would have stuck with the cai and tune. I'm afarid to drive hard now, can't afford to keep replacing trannys.

zkiller

Brent broke his 5R55S running 600 RWHP on the dyno. He is going to put a 4R70W transmission conversion kit behind that 600 RWHPturbo motor but that motor recently puked on Brenttoo.
I have been flogging my Stage III 5R55S tranny and so far it performs perfectly but likes to spit tranny fluid out the vent after hard driving. It has weathered hard launches with slicks and 1.6 60' times so far!