A guy on F150online having issues with 4r70w - TCCoA Forums
 
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post #1 of 10 (permalink) Old 02-21-2013, 08:42 AM Thread Starter
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Cool A guy on F150online having issues with 4r70w

Hey guys. Maybe you can help. I'm a member at F150online and there is a guy there who is having an abrupt shifting problem. the way I understand it, he put a '96 4r70w from an F150 into his 2002 F150. He says everything matched up when he put it in the truck. He says that it shifts so hard from 1rst. to 2nd. that it feels like the truck is gonna break in two. He says it does it going into 3rd. but not as severe. I suggested to him that it may be modified, but he doesn't seem to think so. I told him to come here for some answers. Could it be that it's modified and just shifting really hard? Or does it sound like a problem? He seems to think there may be a problem with his pin outs.
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post #2 of 10 (permalink) Old 02-21-2013, 09:45 AM
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If someone had jmodded the 96 4r70w, that would account for the hard 1-2 shift. At the most "open" setting, you can really chirp the tires and it would be absolutely unpleasant to drive on the street (perhaps similar to what he's observed).

All that's involved is drilling out a few holes.
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post #3 of 10 (permalink) Old 02-21-2013, 10:37 AM
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Has a broken 1-2 accumulater spring

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post #4 of 10 (permalink) Old 02-21-2013, 10:41 AM
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Originally Posted by RobertP View Post
Has a broken 1-2 accumulater spring
Thats what I was thinking too.

1995 SC------------------1994 SC----------------1993 LX
Black----------------------Red----------------------Grey
3.8-------------------------3.8w/bent rod---------5.0
4R70W--------------------M5R2--------------------AOD
2.4 AR in works---------2.0 Auto Rotor---------N/A
24psi----------------------15+----------------------none yet
450RWHP----------------322RWHP -------------who knows/who cares
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post #5 of 10 (permalink) Old 02-21-2013, 12:18 PM
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Probably broke the 1-2 spring but if 2-3 is also severe then I bet there is a Jmod in there. Someone might have removed the 1-2 spring altogether when doing the Jmod. Only way to tell is open it up.

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post #6 of 10 (permalink) Old 02-21-2013, 12:29 PM
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Uncaged 94:
FWIW, opening it up merely means dropping the transmission pan to gain access to the valve control body. It's kinda messy and you'll be spending a few bucks on transmission fluid but with an F150 at least you should have no problems getting underneath it.

While underneath there, depending on the level of wear, you may also consider replacing the pressure regulator valve and solenoid (discussed in that link I posted previously). Wear on these items can cause hesitation for the car to get into gear initially and while you are up in there, you might as well swap them out (ex: you go from Neutral to first but when you step on the gas there's a slight hesitation before the car starts moving).

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post #7 of 10 (permalink) Old 02-21-2013, 12:29 PM
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Also the 94-97 were bad to break the spring on the 1-2

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post #8 of 10 (permalink) Old 02-21-2013, 12:52 PM
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I third the broken 1-2 spring theory...

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post #9 of 10 (permalink) Old 02-21-2013, 07:32 PM Thread Starter
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Cool

Thanks guys. I knew this was the place to find the answer. I'll post this info up over there. Thanks again!
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post #10 of 10 (permalink) Old 02-26-2013, 11:21 AM
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Lightbulb

& It's always said that the Truck 4R70w Main VB's were 'diiferent" ... & certainly any 2002 Main VB better than a stock 96 Main VB so if he has his prior 2002 Main VB & it's clean then he might want to swap that too while he's in there - In all lilelihood the 96 aint 100% Stock or it would be dead.

GET OFF MY LAWN~! ... & Let's not forget guys... There's still a dead Imaginary Ex-Girlfriend out there...
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