Eagle2000GT

Situation 1: Think about it. Tires are not turning and all of that horsepower hits the clutch, transmission, and rear end all at once. The stickier the tires, the harder it is on the drive train. That is why axles and other things break when running slicks. So yes, it is harder on your car than driving like your grandma. But we are all going to do it anyway. My feeling is that the drive train can take it as long as you're running street tires.

Situation 2: Why would you do that?

Situations 3 & 4: I routinely downshift. Sometimes I downshift and punch it to pass. Sometimes I downshift and motor brake. Sometimes I do both, motor braking into the corner and punching it as I come out. I have alway driven that way and I have never torn a transmission out by downshifting (motor yes, transmission no). My mustang has nearly 110,000 miles on it and I have no transmission problems.

35thAnni99GT

Case in point: Manuals are fun. Autos win drag races.

No driveline shock
~.10 sec shift times (after a shift kit/valve body)
Never miss a gear

JamesDean

Really because I beat an SRT8 Charger. Barely but I did and I drive a 5speed. 1/4's are usually won at the line. That's where I toasted him. I will say that autos are more consistent though. My buddies T/A puts down 13.5 almost every time. Sometimes I do 13.3's and sometimes 13.7. And once a 14.3 when I missed third, my hand slipped off the stick. lol

mustangman02232

put it this way, im about to pull tranny #3 out of my buddies 04 mach 1 with 65k on it due to powershifting, hopefully this time he learns

Fobra

^ buddy needs to learn how to drive

35thAnni99GT

Haha, this was good for a funny read at least. I still don't see your point. My point is you're not going to see alot of guys running track-duty, straight line cars with three pedals.

You might have won a stoplight grand prix against that SRT8, but I'm sure you didn't mention all the 9 and 10 second street cars running two speed 'Glides that would hand you your *** even if they let off at the 1/8th mile.

Jbauer

Automatics Suck, Manuals don't..it's a very simple concept.

I powershfit my mustang every time at the track. Second gear i keep it *near WOT* (to prevent slamming into the wall) and all the rest i powershift at complete WOT while slamming the gear..never once had a problem on my T45.
Change the fluid out and stuff..take care of it, and it should last. I could powershift it night and day and i still think it would take a while to fail. I truly believe powershifting is only bad if your running drag radials or slicks. Of course, the T45 isn't notorious for syncro failures as the 3650 is but still..Mustang transmissions recieve a lot more crap from people than they should..the tremec in our cars is a pretty solid transmission no matter what anyone says imho.

rockstar1725

as long as you match your speed and rpms you should be fine, and dont slam the shift hard when you shift. if you slam ur shifter to hard you can damage you shift forks for those gears, and i never power shift( keeping the gas to the floor while shifting) i just learned to clutch and shift fast, if you learn to do that well ul be able to shift with a low rpm drop.

35thAnni99GT

Before I even say anything, I used to have a T56 in my 1999 GT, so yes I'm very much aware of what manuals can and cannot do.

It's also a very simple concept to grasp that computers will never miss a gear. Humans do. Computers can shift in the time that most people depress the clutch to the floor. Only drivers with extensive seat time can even properly execute a true powershift. Automatic transmissions can load the drivetrain and suspension at the line for smoother, more predictable launches. Manuals shock the drivetrain at the launch with WOT clutch drops decreasing the effective life on seals, gears, bearings, u-joints, and clutches and making for more volatile, but very cool-looking, launches.

It's also common knowledge among enthusiasts that the T45 is inferior in terms of longevity and durability when compared to the T3650. I would not trust one at the track for any period of time on sticky tires. It's all a matter of opinion, however, because while I used to be a staunch propenent of one and I know guys like ZW have had great sucess using them.

Mustang transmissions also deserve every single bit of flak they get. From the Borg-Warner T5, to the T45, to the T3650, with the exception of the new Tremec T-5 in the S197s. When compared to the competition we recieve inferior components to lower the cost of the final product. There's a reason why the 03/04 Cobra recieved the same T56 that came standard with a GM F-body since '93. They are strong transmissions, but Ford wanted to make the Mustang GT an affordable platform so instead we got weaker transmissions and steel driveshafts.

Quicktime_GT

When I first bought my car I use to abuse the hell out of it, after pulling the transmission out twice around LT headers I realized it wasn't worth it.

I use to power shift like this:

Take off
WOT
when rpms got to 5800-6000,
Depress clutch about half way, just enough to release clutch and pressure plate
Never let off the gas
Shift really fast
Start letting off the clutch while shifting into next gear.

If you do everything right, you'll hit the next gear just in time.

If you're bouncing it off the rev limiter you're not shifting fast enough