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How much hp and torque can a stock auto tranny hold? im asking because i bought a vortech v3 non intercooled supercharger for my car and want to make sure my auto tranny can hold the power without any problems.
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2007 Mustang Gt Performance White Automatic, Bamachips Tune, Mac AxleBack Exhaust, C&L CAI
Probably a lot. You see a lot of broken T-5s since the GT 5 speed is an upgraded transmission. My GT has the same tranny and I'm turbocharging, most likely.. I don't forsee a problem! You should get a nice power boost with your setup. You may also benefit lots if turbocharging with some headers.
Well the weak point on the auto transmissions is the same as the manual transmission for the 05-10 GTs, its the input shaft, it is only a 10 spline. They seem to break at different points, some people say that the internals of the motor will need to be forged before the transmission. Unless you do a lot of hard launches at the strip with slicks/drag radials. I personally have not seen one break at the strip yet, but i do know from other forum post that it does happen from time to time. As far as going with the Vortech V3 non-intercooled kit, you should be fine on the stock auto transmission.
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Alloy 2007 GT Deluxe Manual
Factory 3.55 Gears, 20% Tint, Roush STS, FRPP CAI & Brenspeed Tunes, 20"x9" & 20"x10" Black/Machined CS 40, GT500 Conversion, CHE LCA Poly/Rod & K-Member Brace w/ Torque Limiters, Comp XFI NSR Stage 2 Cams, Pypes LT Headers and High Flow Catted H Pipe with FRPP "Stinger" Axle Backs
Last edited by moburto07GT; 10-04-2009 at 01:50 AM.
Vehicle: 2006 Mustang GT Premium Auto - Vista Blue
Location: Deep in the <3 of Tx
Posts: 2,836
Quote:
Originally Posted by Casey4s
Ford rates the 5R55S transmission at 500 ft lbs, the torque number is usually considered mnore important in rating the Auto trans than HP.
It's actually 550 ft/lbs, hence the 55 in the name - but that's AFTER torque multiplication of the TC. If your engine makes that much, you'll be going way over the rating.
Here's what 5R55S stands for: 5R55S (5speed, Rear drive 550 tq rating multiplied @ converter) Short ratio
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s197 auto tranny?
