Can an OEM A/T handle a heavy modded 01 GT

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chalosf

New Member

Apr 4, 2003

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San Francisco, CA

Jan 25, 2008

#1

• Jan 25, 2008

• #1

I was wondering if i were to install a turbocharger, LT headers plus other mods to my car (2001 gt), will the oem automatic transmission be able to handle it without dying or would i need to switch the transmisson to a better one

 

CobraRed_96_GT

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May 20, 2006

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UCSD/La Jolla

Jan 25, 2008

#2

• Jan 25, 2008

• #2

04yellowgt has put plenty of power into his 4R70W with no real problems to speak of. Will a built auto help? Yes, but it can handle a good deal. Just make sure you get a tranny cooler

 

MrGame

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Nov 8, 2006

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Jan 25, 2008

#3

• Jan 25, 2008

• #3

You can't have LT's and a turbo from what I understand

 

02LaserRed2V

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Jul 30, 2004

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Augusta, GA

Jan 25, 2008

#4

• Jan 25, 2008

• #4

My stock auto couldn't handle the all mighty 360rwhp.

 

DBMSTNG

I fantasize about it being BIG!

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Apr 23, 2002

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Jan 25, 2008

#5

• Jan 25, 2008

• #5

my auto is holding 400+rwhp like a champ.

 

scupking

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Sep 18, 2005

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Enfield, CT

Jan 25, 2008

#6

• Jan 25, 2008

• #6

DBMSTNG said:

my auto is holding 400+rwhp like a champ.

Click to expand...

Man I want 400+. Are your only mods the ones listed in your sig?

 

C

chalosf

New Member

Apr 4, 2003

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San Francisco, CA

Jan 25, 2008

#7

• Jan 25, 2008

• #7

DBMSTNG said:

my auto is holding 400+rwhp like a champ.

Click to expand...

Damn sweet..l...I just always hear people say manuals are better...I was hoping to be between 400hp and 500hp so hopefully it doesn't blow it.

 

joshjwc9

Active Member

Jun 12, 2006

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Palm Harbor, FL

Jan 25, 2008

#8

• Jan 25, 2008

• #8

scupking said:

Man I want 400+. Are your only mods the ones listed in your sig?

Click to expand...

Key word is only...

 

02LaserRed2V

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Jul 30, 2004

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Augusta, GA

Jan 25, 2008

#9

• Jan 25, 2008

• #9

Avoid the "manual" downshifts. I think that took a toll on my auto.

 

04YELLOWGT

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Jun 29, 2005

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Indiana

Jan 27, 2008

#10

• Jan 27, 2008

• #10

I was pushin 430rwhp on a Mustang Dyno with my old SQ-Trim blower. That was also only reving the car to 5700rpms and I normally take to 6700 so Im sure there was more power there. This was a completly BONE STOCK auto, not even a tranny cooler on it. I always woundered what the record HP and 1/4 mile time was for a bone stock 4R70W, I would think I would be close to it. I know if I could get the car in the 10s with the stock tranny this year but Im not going to risk breaking at a track thats 1.5-2hrs away from home.

The problems are starting though. Its sliping in 2 and 3 gear which is hurting my power and also the covertor was unlocking on the dyno hence why we only took it to 5700rpms. Im getting a built tranny w/ stall put in Feb 4th along with a tune for the new blower to fix these problems.

It all depends on how you drive the car and how much you race it. Im pretty easy with it on the street and race it maybe 1-2 times a month for the past 2 years with the blower on it. It only started acting up in July so really it held up pretty well.

 

04YELLOWGT

Active Member

Jun 29, 2005

1,135

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Indiana

Jan 27, 2008

#11

• Jan 27, 2008

• #11

chalosf said:

I was wondering if i were to install a turbocharger, LT headers plus other mods to my car (2001 gt), will the oem automatic transmission be able to handle it without dying or would i need to switch the transmisson to a better one

Click to expand...

Lets just say your motor should go out before your transmission will.

 

DBMSTNG

I fantasize about it being BIG!

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Apr 23, 2002

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Jan 27, 2008

#12

• Jan 27, 2008

• #12

scupking said:

Man I want 400+. Are your only mods the ones listed in your sig?

Click to expand...

i do have a forged shortblock with ceramic coated pistons. i think the ceramic coating makes a sizable difference. i seem to be making more power than similar cars. i made 380rwhp at 11.0:1 a/f ratio and 16* timing with the stock converter, LMAF, and SVTF pump. I have since leaned it out to 12.0:1, replaced the stock converter with a lighter and stronger PI triple disc, and had to replace the LMAF and SVTF pump because i maxed them both out. and this is all non-intercooled on 93 octane.

 

SVT32VDOHC

waiting for the next hack atta

Founding Member

Nov 22, 2001

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Motor City

Jan 28, 2008

#13

• Jan 28, 2008

• #13

The auto transmissions in the 99-04 Mustangs were the best 4R70W's yet. My tuner runs a 9 second Mach 1 through that transmission. It was stock through the entire 11 second and 10 second season. The winter before he ran 9's he pulled it and had his builder rebuild it. His builder told him there was nothing really wrong with it, but he still beefed it up.

I would at least add a big trans cooler with a fan and good fluid. A shift kit will also be plus as well.