2008 FORD MUSTANG 6 CYLINDER AUTOMATIC. IT HAS NO POWER WHEN I ACCELERATE FROM STOP. THE TACH RPMS GO UP BUT CAR MOVES SLOW. wHEN i SHIFT TO #3 SPEED IT WILL TAKE OFF. THEN i CAN SHIFT INTO AUTOMATIC DRIVE. I TOOK IT TO AUTOZONE & DIAGNOSIS AND THEY READ THE p0745 CODE. WHAT DO YOU THINK IT IS? WE COULDN'T FIND TRANSMISSION DIP STICK TO CHECK LEVEL. HELP ME PLEASE! i DON'T WANT TO TAKE TO DEALER OR TRANSMISSION SPECIALIST. THANKS FOR YOUR ADVICE AND HELP!

Any codes?

Does it iddle at 1800-2300 RPS? If so have the TPS changed.

Hi Sherri,what kind of vehicle you have,need year,make,model.

who puts a 4 cyl in a mustang??? 4 cyl cant push that kind of weight,i have a briggs and stratton motor that might work better

Not driving a corvette? Just kidding. More details are important. How slow is your acceleration? Is it 0-60 in 8 seconds, or 20 seconds? What is redline on your car? If redline is 5K then 4000 is a good responsible shift point. If redline is 8K then shifting at 4000 is probably robbing your engine of it's torque and horsepower band. I believe the GTS model has an 8K RPM redline, the GT may be lower, but in that case, shifting at 4K is too soon for strong acceleration. Your Tachometer should have redline clearly marked. For responsible use, stay below that, maybe 10-20%. For economy stay further still, but for power you need to let the engine use it's RPMS, especially smaller and fewer cylinder engines usually don't make their power until they are half way through the RPM range and above.

200 cid 6 cylinder: dwell 35 to 38 degrees, point gap .024 - .026, initial timing: 6 btdc for manual, 12 btdc for automatic. You'll need a semi-decent dwell/tach - something in the 25 to 30 buck range should do nicely. Good luck.

Hi Seth, Check out your engine and gear box mountings! Regards John

I have the same car. So far no problems with the Transmision. I had the Trans oil change out every 60 K Sure sounds like you need to get the Transmision checked. Is the fault light on. I have invested ina fault code reader sure is worth it. 
Good luck.  Vilmos

You really have to think a bit about when those sometimes are. Is it only when the engine is already warmed up? Is it only when the engine is cold? If you have a tach on the dash, what is the real high idle speed of the engine? How many rpms? Does the transmission shift hard or smoothly?