Advice on Tuner for GT with Automatic Transmission

I am looking for feedback based on actual experience for those of you who have a GT with Automatic Transmission and have added a Tune and CAI.

I picked up an 05 vert in November (I'm in Minnesota) and looking at getting it ready for spring and have been reading a lot of the past threads on CAI's and SCT Tunes. Car is completely stock with the 3.31 automatic, not looking to do any extensive future mods but for now am getting ready to pick up a kit with CAI (probably JLT) and SCT Tuner. I plan to go with a 92 octane daily drive tune and I've read a lot of good things on Tillman (All Out Tune) and Brenspeed 92 (I'd consider Bama if they were shipping!). My question(s)/concerns are:

1. Are shift so abrupt that even under part throttle accleration am I going to be spinning/chirping everytime it shifts?

2. From a performance perspective it would seem unnecessary wheelspin in 2nd, 3rd, etc. may hurt performance - any thoughts on this?

3. Any comments on each of these tuners and how they perform with the automatic in terms of overall drivability, etc.

4. After I get a tune from one of these companies can I manually adjust the shift firmness via the SCT without getting a whole new tune file from them?

5. Anybody have any real 1/4 mile times for auto's before and after these tunes?

Any other comments greatly appreciated!

Thanks!

Thank for everyone that has replied so far

To sum up - Tires only chirp on shift at WOT, and overall the firmess of shifts are a good thing! Also, 4.10 seem to be the gear of choice for the Auto (not sure if i will pull that trigger or not this year).

Also had positive comments about Brenspeeds tune with the Auto (thanks ViperNuge!). Anyone have any experience with the Tillman ALL OUT TUNE for the Automatic? If so please post some feedback and let me know if you feel you have the best tune possible!

Thanks again!

1TUF2005GT

Update on Auto GT Tune Advice

I pulled the GT out a week ago from storage and put on new 18" Sport Muscle Tach Chrome rims (they look great) on with new 255 Bridgestone RE760's - Great Tire and Rim combo and now I have a tire that actually hooks.

I just installed a JLT CAI and American Muscle Bama 91 Race Tune on 3/18. No issues with install of anything and quite easy for a novice like me.

Overall I'd say there is more total power and car feels stronger and a great benefit for just over $500. Under WOT I get a little 2nd gear spin, and have heard a chirp in 3rd once with two people in car but I've gotta say I think these new tires offer a lot of grip and just wont smoke em like the prior stock PZERO's.

Overall throttle response on the Race tune is touchy at first but under normal driving at various speeds seems totally fine.

Coupe of things- ANY COMMENTS FROM OTHER GT AUTO OWNERS APPRECIATED:

1. Why won't the car downshift into 1st gear while rolling at about 30mph with stock gears? Is this programmed in the tune or a limit of the transmission? 1st Gear runs to about 45 mph and it seems like it should drop all the way to 1st (my 00 vette used to drop into 1st at 35mph and would shift into 2nd at about same 45mph)? Anyone?

2. Under one run while under WOT when car hit 2nd it seemed to shut down (saw TCS light on speedo flash) - think it was the TCS kicking in and pulled me back. Anyone else experience this? Should I run with TCS off?

Again - Anyone else with Auto's and Tune feel free to comment on above.

I'll post more once I get some more time driving under various conditions.

My experience with other Automatics including my past C5 Corvette dropped into 1st up until about 35mph. With the 3.31 gearing in the Mustang Auto 30 mph is only about 4000 RPM's. I think if i punch it down at 50 mph it drops to 2nd and is actually at a higher RPM.

My main question though is this a function of the "tune" or a limitation somewhere else in the car or transmission?