Newbie,in crisis 4R70W - TCCoA Forums
 
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post #1 of 8 (permalink) Old 07-17-2007, 01:39 AM Thread Starter
 
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Angry Newbie,in crisis 4R70W

Hello, I have a 95 thunderbird. First indication that i had problems , i was coming home and tranny stared slipping from a stop then catching at higher rpms. Then after a long drive about a week later. Tranny starts TC lock up. And stalls when shifted into reverse , drive , 1 ,or 2. and when i would shift and jump the rpms to keep engine from stalling car takes of , but the engine rpms will surge up and down for a few seconds. So i decides to change the tranny filter. The idiot i was i bought 5 quarts of ATF TYPE F and change filter and refilled with that. Of course i found that my inital problem was not fixed by new filter because of wrong fluid. Vehicle was only run a couple blocks with wrong fluid. I then drained tranny and torque converter and replaced with the correct fluid mercon 5. I still have TC lock up but isnt as bad and gets better when vehicle warms up. TC lock up seems to be the worst in reverse stalling almost all the time. I also when braking and Tc should break loose if it stays locked up and shouldnt be , engine /RPMS surge up and down and will sometimes slowly stabalize and car will actually idle. Or other times it will surge and lock up increases and car stugles untill eventually stalls if not shifted to neutral or brake released allowing car to move. This is my daily driver and I havnt the time or money to guess or trial and error any more. Please help, I will apprecieate it greatly thank you
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post #2 of 8 (permalink) Old 07-17-2007, 07:48 AM
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If it is definitely the converter staying locked then the odds are that there is a problem in either the valve body or the torque converter clutch solenoid. Those things are much more likely than a problem within the torque converter itself, but that is possible as well.

Like I just posted in another thread, it is really darn hard to diagnose over the internet. You end up with a lot more information than you need usually and most of it doesn't actually relate.

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post #3 of 8 (permalink) Old 07-25-2007, 11:43 AM
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I actually had a similar problem when I would start my car it would be fine but when I put it in gear it would struggle then die and any gear...I would rev it up and would only help for a few more seconds then it would die.

After I switched a few parts and of course there is no check engine light. It turned out to be the TPS or throttle position sensor, I got a new one and my problem was fixed.

Just my .02 about what happened to me.
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post #4 of 8 (permalink) Old 08-01-2007, 01:41 AM Thread Starter
 
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Decided to replace

to simply replace transmission , (I believe) I have found a replacement. However I would apprieciate the help if someone could tell me if this transmission is right for the swap. My vehicle is a 95 Ford Thunderbird LX w/ 4.6L. The replacement I would like is....

4r70w transmission from a 96 Mustang GT.
Was swapped out at around 60k to a manual so everything is pretty much included (except the shifter and ecu.)
Have the shifter cable, B&M transmission cooler, automatic pedal assembly, transmission harness, automatic driveshaft yoke (yoke only!), stock torque converter, and Performance automatic valve body.
He dosn t have the stock valve body.
The springs/servos have been changed to jmod spec's in addition to the upgraded valve body.

I have heard that the TCC and other parts may be different and can cause problems between some years . I am looking for a hastle free swap, and want to make sure I am getting the right replacement.
Thank you in advance for any assistance in confirming the compatablity.

Allwayzon
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post #5 of 8 (permalink) Old 08-01-2007, 09:21 AM
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That is unfortunately not a direct swap. There are several little things that you would need to change to use that and the TCC is one of them.

The most direct swap will be 94-95 v8 Thunderbird or Cougar and 93-95 Lincoln Mark VIII transmissions.

But you can use any year of the Mark VIII or 4.6l v8 bird and Cougar transmissions if you get the proper TCC.

Darrin

01 F150 5.4L 4x4 and a 98 Mustang GT vert sitting engineless and without transmission or converter


All my vehicles tuned by BC Automotive (me)

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post #6 of 8 (permalink) Old 08-01-2007, 09:24 AM
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As Darrin said it's not a direct swap but it's not bad. If you can get a good price on it I wouldn't hesitate. I have an 02 GT trans in mine currently

Birdless

There is no limit to what you can acheive if you don't care who gets the credit.
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post #7 of 8 (permalink) Old 08-01-2007, 12:30 PM Thread Starter
 
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Yes I feel the price is good. Now what exactly are the parts that need to be changed out.. 1. TCC if someone could please tell me what needs changed i would apprieciate it.
Thank You
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post #8 of 8 (permalink) Old 08-01-2007, 01:52 PM
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Pretty much the TCC, the lever and a new speedo gear to account for the fact that the Mustang transmission has 8 drive teeth on the output shaft instead of 7.

Darrin

01 F150 5.4L 4x4 and a 98 Mustang GT vert sitting engineless and without transmission or converter


All my vehicles tuned by BC Automotive (me)

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