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Thread: Used 4R70W modding ?

  1. #1
    Join Date
    Feb 2009

    Used 4R70W modding ?

    Thats for your guys help with helping find what was wrong with my GT 4R70W , so I found a 01 4R70W 30,000 , paid 400 for it , I opened it up tonight and it still has the yellow plug , so Im the first one to crack it open , I cleaned it up , removed the Valve Body , and 1-2 / 2-3 springs , when I get the blown trans out of my mustang I will swap out my drilled S/plate .

    My ? is should I do anything to my new/used 4R70W , before I install it next week , maybe new accumulators or open her up replace something that does not need special tools to do ?
    And is the 2001 converter stall different then the 2004 ?

    Thanks for helping out a Mustang guy , as this site is the best for 4R70W info , the Auto Mustang is kind of like the black sheep on most Mustang forums , so not much info can be found out about the 4R70W !
    Last edited by ran260gt; 04-28-2009 at 10:34 PM.
    4R75W SatinBlack 2004 Mustang GT - CAI - ProChamber - SLP LM II - SCT X3 - JMod - 4.10s - Nitto DR.
    mph....104.30 - Atco Raceway NJ.

  2. #2
    Join Date
    Apr 2009
    Brevard County, FL
    Quote Originally Posted by ran260gt View Post
    Thanks for helping out a Mustang guy , as this site is the best for 4R70W info , the Auto Mustang is kind of like the black sheep on most Mustang forums , so not much info can be found out about the 4R70W !
    Foxes, Panthers... We're all in the same jungle...

    The members here are really great people! As a new Marauder owner myself, I have had a lot of questions to ask, all which have been answered here. The beauty of it all is that you get answers from people who know the vehicle and aren't just "hacks" like at some other forums. I owe a lot of thanks to this forum and gladly contribute whenever I am able to...

    2007 CVPI & 2004 Marauder 300A

  3. #3
    Join Date
    Jun 2004
    Carolina Forest, Myrtle Beach, SC
    I'm no expert, but I'd change out the OD shaft/stub. Weak point in the tranny. There are numerous threads here on it. The MM seems to respond well to a higher stall TC, Ford actually went higher with the 04 vs what came in the 03. I believe there is a NIB 3000 stall TC in the classifieds here for cheap.
    2004 DTR Marauder, Built 26 February 2004, Inservice: 02 July 2004 Retired from DD 17 July 2008. Survived the cut, 28 April 2012. Back as a DD as of 18 November 2012.

  4. #4
    Join Date
    Mar 2008
    Couple of car lengths ahead of you
    Not too sure what stall you have now, but these heavier MM demand a 2600-2800 minimum stall upwards to 3500 if s/ced. I would have to think 2800 would be more than enough in a lighter weight mustang if used for a driver/play car. I see you are running 4.10's, those matched with a 2800 stall plus good drag radials i would think would put you closer to the low 1.8's on your sixty. Wait till more advice rolls in as i'm NOT a stall pro. Also make sure and list anything else done to your car if not in your sig, dyno #'s, etc.

    Cobra short block / ProCharger F1-A / Cog drive upgrade / Manley valves / Brian Tooley Racing valve springs / 80# inj. / -8 fuel line / -6 return / Aeromotive 340 pumps and regulator / 2012 GT500 TR6060 six speed / twin disc clutch / Driveshaft Shop GT500 upgraded CV joint shaft / BA5000 blow thru MAF/ 4.10's / Ford Racing 31 spline set up and Girdle / Metco D.S. safety loop / Stainless Works headers, cats, and everything else out back / ClassGlass hood / Bob's hood strut mod / Hurst line lock / Metco control arms / Addco front and rear sway bars / Monroe severe duty shocks all around / Race concepts rotors / Badgeless grille / 35% tint / FBM's interior LED kit and ambient lighting kit / Pioneer FB700 deck / kenwood speaker 4 Ch. / Rockford Fosgate 10" sub and amp / Kicker 6 X 8's all around / back up cam / bluetooth / Pioneer Xm / 704 RWHP 603 RWTQ tuned by Mo's Speedshop.

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