Reprogramming 2001 GT auto trans

Steve Curry · May 1, 2005

I purchased my first Mustang this past Saturday (4/30). I have been a GM guy since 1975, and know nothing about Fords. My 2001 Mustang GT has an automatic transmission, and the calibration is terrible. The shifting is very slow, spongy, and uninspiring. What is the best way to firm up and quicken the shifting of the trans? Do I need to buy a programmer to electronically adjust the transmission, or do I use a valve body shift improver kit?

Any suggestions and product recommendations would be most welcome!

Thanks
Steve

Kilgore Trout · May 1, 2005

The Predator hand held engine computer will reprogram your engine AND your transmission. There is an announcement thread at the top and in it is a discount on the Predator for Stangnet members, $49 off the $399 price.

You are awesome for buying a Mustang! Why did you decide to abandon the evil GM empire?

white99gt · May 1, 2005

Actually the best way is to firm it up VIA the "jerry mod" .Its basicly a shift kit designed by the guy that designed the auto tranny in the stangs.

Doing it via the computer adds to much pressure and can actually hurt parts.

A lot of your answers can be had HERE

ceyko · May 1, 2005

The debates will go on. Jmods work, the tuner works, shift kits work. They all work. *I* vote Predator from RWTD with one of their tunes.

Take care,
Ceyko

Kilgore Trout · May 1, 2005

Actually the J-mod instructions are located here: http://www.tccoa.com/articles/tranny/index.html

OUR01GT · May 1, 2005

Decide on what you want to do with the car (modifications). If you only want the tranny working better use a shift kit. If you want to improve the motor/tranny just buy a tuner but be careful with adjusting the shift pressure.
If you install a shift kit and use a tuner/programmer, set the tranny shift pressure option to stock (with the tuner). If you don't you will have some serious problems with the tranny!

white99gt · May 1, 2005

ceyko said:
The debates will go on. Jmods work, the tuner works, shift kits work. They all work. *I* vote Predator from RWTD with one of their tunes.

Take care,
Ceyko

Actuall not ALL shift kits work.Follow the link i posted .There is a post in there by jerry himself stating why not to use a shift kit like transgo..

Kilgore Trout · May 1, 2005

I think everyone can agree that if you increase the shift pressure you should install an additonal transmission cooler. The stacked plate type are the best...

ceyko · May 1, 2005

Kilgore Trout said:
I think everyone can agree that if you increase the shift pressure you should install an additonal transmission cooler. The stacked plate type are the best...

Yes, this is true and noted in several places in the jmod stuff. However, I have a friend who upped his and monitoed his TFT and it is did not exceed 170 at WOT or normal driving. The trick is if you have gears. I have not had a chance to monitor mine. Also, this assumes the data from the datalogging utility is accurate.

white99gt - I understand what you are saying and it needed to be noted for clarification. My point is that there is more then one way to skin a cat. The original poster will need to do his or her own research to determine the pluses and minuses of each tactic. (Jmods likely being the most bullet proof, but the most difficult to impliment) As far as I could read, the draw back to using a tuner is the higher likely hood of busting seals under WOT with the extra pressure. *I* find it a good excuse to upgrade.

Take care,
Ceyko

Steve Curry · May 1, 2005

Kilgore Trout said:
The Predator hand held engine computer will reprogram your engine AND your transmission. There is an announcement thread at the top and in it is a discount on the Predator for Stangnet members, $49 off the $399 price.

You are awesome for buying a Mustang! Why did you decide to abandon the evil GM empire?

Well, I have been an Oldsmobile owner since '75. My very first car was a '68 Hurst/Olds. Have alway loved Oldsmobiles. When GM killed off Olds in '00 to die a slow lingering death until '04 (107 years in business making cars) while keeping a car line like Saturn alive was too much for me.

I have always liked the '93-'04 GT's and Cobras. And the new '05 Mustang knocked my socks off!!! THEN, there is going to be a new GT500 Shelby!!! All this happening a Ford, while GM considers the Monte Carlo it's competitor to the '05 Mustang!?? GM sucks, and their leaders are idiots. I sold my '95 Camaro and bought the '01 GT, and I feel just fine about it, thank you.

I still have a '68 442 which is a work in progress. You can see it here: http://members.cox.net/rocketman_garage

Oh, and back to the topic, thanks for suggesting the programmer, and info on the discount!

Darkhorse845 · May 1, 2005

Kilgore Trout said:
The Predator hand held engine computer will reprogram your engine AND your transmission. There is an announcement thread at the top and in it is a discount on the Predator for Stangnet members, $49 off the $399 price.

You are awesome for buying a Mustang! Why did you decide to abandon the evil GM empire?

I second that get the Predator!

Kilgore Trout · May 1, 2005

Awesome 442 webiste, great project!

propellerhead · May 1, 2005

Another thing to consider is the tuner approach lets you undo the mod in 3 minutes, if you so decide it's not what you were looking for. If you think the software approach is not your answer, you have to option to uninstall it, sell it and go with a shift kit or jmod. You can't do that the other way around. As ceyko said, the options are on the table. Everyone feels strongly about the option they chose. The reader still needs to do the research and make the final choice.

Steve Curry · May 1, 2005

OUR01GT said:
Decide on what you want to do with the car (modifications). If you only want the tranny working better use a shift kit. If you want to improve the motor/tranny just buy a tuner but be careful with adjusting the shift pressure.
If you install a shift kit and use a tuner/programmer, set the tranny shift pressure option to stock (with the tuner). If you don't you will have some serious problems with the tranny!

I plan to buy a cat-back system soon. I am thinking the Flowmaster American Thunder set up, (if it doesn't create too much interior noise). I will add a new air inlet pipe and filter ( maybe the BBK set up). And later a set of full length headers, X pipe and high flow cats. And that'll be about it for performance mods. I'd like to do some cosmetic mods such as the Mach 1 clone stuff with the shaker scoop, etc.

Steve Curry · May 1, 2005

propellerhead said:
Another thing to consider is the tuner approach lets you undo the mod in 3 minutes, if you so decide it's not what you were looking for. If you think the software approach is not your answer, you have to option to uninstall it, sell it and go with a shift kit or jmod. You can't do that the other way around. As ceyko said, the options are on the table. Everyone feels strongly about the option they chose. The reader still needs to do the research and make the final choice.

Thanks for the response, guys. I think I will try the programmer. As you said, if it is not what I am looking for, I can un-do it and go with the shift kit.

Darkhorse845 · May 1, 2005

Steve Curry said:
I plan to buy a cat-back system soon. I am thinking the Flowmaster American Thunder set up, (if it doesn't create too much interior noise). I will add a new air inlet pipe and filter ( maybe the BBK set up). And later a set of full length headers, X pipe and high flow cats. And that'll be about it for performance mods. I'd like to do some cosmetic mods such as the Mach 1 clone stuff with the shaker scoop, etc.

:OT: The Flowmaster American thunder (40 series) catback will make
your stang sound awesome!
You can get the Flowmaster catback at mustangsunlimited.com .

ceyko · May 1, 2005

Cat-back - Recommend Magnaflow products. They are all cool though. Check out www.mustangexhaust.com and try to find the sound you like. Some like flos, some like bassani..etc

Tuner - Also don't discount the SCT products. Likely, you'll desire the Predator but be sure to research both products prior to buying. I'd hate for ya to buy the Predator - when by some chance the SCT product would've done you better.

Ceyko

Steve Curry · May 1, 2005

How about the Hypertech 41005 programmer? How does it compare to the Diablo Predator or the SCT?

ceyko · May 1, 2005

The hypertech and that other Superchips one are not popular at all. You also want to make sure you can find tuners for them. SCT and Diablosport have a big network of people who know their stuff.

Kilgore Trout · May 1, 2005

Hypertech = teh suck

You must choose between SCT or Predator.

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