Need Help With My Modded 4r70.

Discussion in 'SN95 4.6L Mustang Tech' started by Mr. Rustypwnz, Oct 17, 2013.


  1. Mr. Rustypwnz

    Mr. Rustypwnz Advanced Member

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    Ok, so I have a stock 03 4r70w in my 98gt. It has a huge trans cooler and a manual valve body. Problem is, it just dosent shift that well into 3rd gear. It will chirp the tires into 2nd, but 3rd feels like ****. I have taken the 3rd gear accumulator spring out and it has gotten a little more firm, but I just want it to shift a little harder like 2nd gear does (because of the nitrous!). Anyone know what im talking about?
    #1
  2. flstang65

    flstang65 Well-Known Member

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    could you get a tuner and adjust the settings that way?
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  3. Mr. Rustypwnz

    Mr. Rustypwnz Advanced Member

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    nope! all electronics have been ditched. It has a vacuum modulator on it now.
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  4. sneaky98gt

    sneaky98gt Mustang Master

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    I'd go inquire on the TCCoA and SCCoA boards. There's some guys over there that know the 4R70W like the back of their hand.
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  5. Mr. Rustypwnz

    Mr. Rustypwnz Advanced Member

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    yeah Ive tried to get on clickclickracing, but they wont validate my account. Ill try and find jerry on tccoa later. He engineered the damn thing lol.
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  6. sneaky98gt

    sneaky98gt Mustang Master

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    http://forums.tccoa.com/forumdisplay.php?f=955

    Yea, I'm not sure if Jerry still posts there or not, but there's plenty of other guys that know that transmission pretty darn well, too. RobertP routinely builds 4R70Ws to hold 700+ horsepower.
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  7. 95Vert383AOD

    95Vert383AOD Active Member

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    Hows the Linkage? Is it fully seating in 3rd? Any loose bolts on the valve body? Does the Trans still have O/D? How is the Torque converter? Are you sure thats not slipping?
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  8. Mr. Rustypwnz

    Mr. Rustypwnz Advanced Member

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    It does have OD, just not wired up yet. Im 90% sure its not slipping. It is fully seating in 3rd as well, it has a tad bit of play though. I played with it some more today and I think its just the converter messing with me. It flashes at 43-4400. It pulls hard on the top end and def. dosent feel like its slipping, but I cant verify because lock up is blocked off.
    #8

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