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post #1 of 12 (permalink) Old 05-21-2010, 12:21 PM Thread Starter
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4R75W Trans

Hey All!!!

Long time no talk to a lot of you, i have a question that hasent been answered on my stang forums. My new 04' Mustang GT has a 4R75W Trans. I wanna throw a shift kit-j-mod or valve body in it. would the 4R70W specs work for the 4R75W? Hoping Jerry can spot me an answer on this, thanks in advance!!

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post #2 of 12 (permalink) Old 05-21-2010, 12:55 PM
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Might be a long wait for Jerry himself as he has retired from public life. Your 4R70W has a lot of "j-spec'ed" holes already, you'd want to get with one of the two transmission gurus on here to take care of that for you.

Also, I bet your sig doesn't last long...

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post #3 of 12 (permalink) Old 05-21-2010, 07:23 PM Thread Starter
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why wouldn't my sig last long? i mean i know the real diff between the 70 and the 75 is the torque it can handle, but im really unsure if the 75 has the same vb specs as the 70.

Also i know when i got rid of my tbird i had well over 1000 posts....wonder why it dropped to 294....

Hayden Trans Cooler, R2C Cold Air intake, BBK Tuned Shortie Headers, Pypes High Flow Cats, Flowmaster 40's, SCT VMP Custom Tune, 06 spinner center caps, Mach 1 Chin Spoiler, Smoked Fogs, Blackout headlight covers, 8000K HID Headlights, Sequential Tails.
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post #4 of 12 (permalink) Old 05-21-2010, 07:58 PM
No, Mr. Lemmywinks, No!!!

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why wouldn't my sig last long?
10 line max, no pix even for members.

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.


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post #5 of 12 (permalink) Old 05-21-2010, 08:20 PM Thread Starter
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its a link

Hayden Trans Cooler, R2C Cold Air intake, BBK Tuned Shortie Headers, Pypes High Flow Cats, Flowmaster 40's, SCT VMP Custom Tune, 06 spinner center caps, Mach 1 Chin Spoiler, Smoked Fogs, Blackout headlight covers, 8000K HID Headlights, Sequential Tails.
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post #6 of 12 (permalink) Old 05-21-2010, 09:47 PM
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Quote:
Originally Posted by TbirdSims View Post
i mean i know the real diff between the 70 and the 75 is the torque it can handle, but im really unsure if the 75 has the same vb specs as the 70.

Also i know when i got rid of my tbird i had well over 1000 posts....wonder why it dropped to 294....
Darrin made an interesting post about the differences awhile back, you may want to reach out to him.

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post #7 of 12 (permalink) Old 05-21-2010, 09:50 PM Thread Starter
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yeah after i posted this i remembered Darrin helped me out with trans issues with my bird a long time ago, sent him a PM ,

Hayden Trans Cooler, R2C Cold Air intake, BBK Tuned Shortie Headers, Pypes High Flow Cats, Flowmaster 40's, SCT VMP Custom Tune, 06 spinner center caps, Mach 1 Chin Spoiler, Smoked Fogs, Blackout headlight covers, 8000K HID Headlights, Sequential Tails.
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post #8 of 12 (permalink) Old 05-22-2010, 12:31 PM
No, Mr. Lemmywinks, No!!!

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i mean i know the real diff between the 70 and the 75 is the torque it can handle, but im really unsure if the 75 has the same vb specs as the 70.
This page lists changes by model year for the transmissions...

http://www.p71interceptor.com/tranny...bers/crownvic/

The biggest diff is that there are no 4r75w trannys that will work for our cars without major modification; they have different sensors. The tailshaft and tailhousing would have to be swapped.

Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.


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post #9 of 12 (permalink) Old 05-22-2010, 01:24 PM Thread Starter
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Thats not my question, i have an 04 Mustang GT, with a 4R75W, the question i have is, will any valve body modifications ( Shift Kit, J-Mod, VB) for the 4R70W work with the 4R75W.

Hayden Trans Cooler, R2C Cold Air intake, BBK Tuned Shortie Headers, Pypes High Flow Cats, Flowmaster 40's, SCT VMP Custom Tune, 06 spinner center caps, Mach 1 Chin Spoiler, Smoked Fogs, Blackout headlight covers, 8000K HID Headlights, Sequential Tails.
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post #10 of 12 (permalink) Old 05-22-2010, 01:47 PM
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Originally Posted by TbirdSims View Post
Thats not my question, i have an 04 Mustang GT, with a 4R75W, the question i have is, will any valve body modifications ( Shift Kit, J-Mod, VB) for the 4R70W work with the 4R75W.
Yes it has the same valve body as the 4r70w, but like mentioned above you will find that some of the holes are already drilled to spec. Just drill out the rest and you're good to go.
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post #11 of 12 (permalink) Old 05-22-2010, 04:32 PM
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Personaly I think the 08+ 4r75 valvebody is the best of all. They don't need modified to be great. Put a sonnax Pressure regulator valve in them and change the acumulator springs to get the shift feel you desire. As far as jmodding them I don't think any of the holes will benfit from any of the drill bit sizes, they are all already larger.
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post #12 of 12 (permalink) Old 05-22-2010, 09:22 PM Thread Starter
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ok cool deal, so my best bet is to just get an sct tuner and tune it if the vb is already good to go...

Hayden Trans Cooler, R2C Cold Air intake, BBK Tuned Shortie Headers, Pypes High Flow Cats, Flowmaster 40's, SCT VMP Custom Tune, 06 spinner center caps, Mach 1 Chin Spoiler, Smoked Fogs, Blackout headlight covers, 8000K HID Headlights, Sequential Tails.
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