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Discussion Starter #1
Hey guys, well the transmission in my car seems to be going. I've got 138,000 miles on it. Every time its cold its hard to shift out of park, its starting to shutter now and then but it hasn't slipped yet. I just think its going to go pretty shortly. Anyway I've been looking around trying to see what my best bet is on a new trans and I stumbled across a few things on ebay. But Im not too sure about the swap.

Heres what I came up with on an egay search
http://search.ebay.com/4R70W_W0QQ_trksidZm37QQcatrefZC6QQfromZR10QQfsooZ2QQfsopZ3QQftrtZ1QQftrvZ1QQsacatZQ2d1QQsaprchiZQQsaprcloZQQsbrsrtZd

But what would I have to do to swap this trans into my car
http://cgi.ebay.com/ebaymotors/4R70W-Ford-Mustang-Thunderbird-Automatic-Transmsision_W0QQcmdZViewItemQQcategoryZ33727QQihZ006QQitemZ160120764319QQrdZ1

I mean will it just bolt right up or what? Im definately a noob when it comes to this, thus why I have turned to ya'll for help.

Any info is greatly appreciated,
thanks guys.
:tongue:
 

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when mine went, my research found that 99+ mustang was the way to go. bolts right up. the wireing harness has to have the pins pulled out and rearranged, but i looked up the right diagram, and its really easy. put the plug back together and its wonderfull to not worry about the tranny anymore. i used a rebuilt tbird tc. the best part is i can manually shift this thing all day and it loves it. pop it into second to slow down, or to leave someone in the dust. best money i ever spent on the car. i would recommend having a new dipstick tube at the ready. after the install, I had to wait a few days before i could fill it cause the old one broke(crumbled) at the base.

i drive 140 miles/day to and from work. 4 years now and it was used when i got it. thats my $.02
 

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Fry Rice Specialist
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4,794 Posts
Hey guys, well the transmission in my car seems to be going. I've got 138,000 miles on it. Every time its cold its hard to shift out of park, its starting to shutter now and then but it hasn't slipped yet. I just think its going to go pretty shortly. Anyway I've been looking around trying to see what my best bet is on a new trans and I stumbled across a few things on ebay. But Im not too sure about the swap.

Heres what I came up with on an egay search
http://search.ebay.com/4R70W_W0QQ_trksidZm37QQcatrefZC6QQfromZR10QQfsooZ2QQfsopZ3QQftrtZ1QQftrvZ1QQsacatZQ2d1QQsaprchiZQQsaprcloZQQsbrsrtZd

But what would I have to do to swap this trans into my car
http://cgi.ebay.com/ebaymotors/4R70W-Ford-Mustang-Thunderbird-Automatic-Transmsision_W0QQcmdZViewItemQQcategoryZ33727QQihZ006QQitemZ160120764319QQrdZ1

I mean will it just bolt right up or what? Im definately a noob when it comes to this, thus why I have turned to ya'll for help.

Any info is greatly appreciated,
thanks guys.
:tongue:

second link won't bolt up to yours. you have to look for 4.6 or 5.4 bellhousing pattern.
 

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I put in an 02 Gran Marquis transmission, and love it.

My original transmission was going about like you describe; on its way out.

The new one is great; shifts nice with better gas mileage to boot.

I couldn't buy a rebuild kit and parts as cheap as a newer transmission...

The only things to watch are:

Change the gear selector shaft out with the one from your transmission before you get it bolted up to the engine... :D You will also need the brackets and sensors.

Flush the transmission cooler in the radiator, or replace it. (the radiator)

The diagram in Jerry's thesis (in the tech articles) is reversed, looking at the other side of the connector. Look at the connector, compare to the drawing. The harness is removable; You need to repin the connector one pin at a time; make new holes in the rubber seal with an awl, it will seal better. Seal unused holes with RTV, let it dry, then cover the insides of the connector on the tranny with silicone grease... also seal off the extra two power wires you will have left over. There are other directions, search google.

Remember, the front exhaust comes off much easier with the transmission crossmember loose!

I had mine done in a few hours... over two days, lol :D

The only issue I found with the new transmission is the 3-4 shift can be slow at low throttle settings. I noticed it in a school zone, but never see it in daily driving.

I noticed that this transmission doesn't seem to have the 'binding' feeling my Black Cougar has, and the Red Cougar used to have, on the 3-4 shift. I think that is due to overlap in the shift process, and this transmission doesn't feel at all the same...I wonder if this one can handle WOT 3-4 shifts?? :)
 

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After I flashed my ECU with a tune from Lonnie, it was only a matter of two weeks before my trans had severely delayed shifts, and HIDEOUSLY harsh 3-4 shift. I would not even call it a shift, it sounded like a bomb went off under the car every time.

That said, what do you want out of your bird? Is it a daily driver? Weekend car?

I wanted an overall race feel to my car, and had Darrin build me a mild Jspec trans. $1500 later, my car shifts super crisp and very quick. WOT runs get my tires spinning pretty hard at ~60 mph, 2-3 shift!

Cant go wrong with Darrin built trans! It will long outlast the car, at a lower cost than a full rebuild of the junk stockers.
 

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Discussion Starter #6
After I flashed my ECU with a tune from Lonnie, it was only a matter of two weeks before my trans had severely delayed shifts, and HIDEOUSLY harsh 3-4 shift. I would not even call it a shift, it sounded like a bomb went off under the car every time.

That said, what do you want out of your bird? Is it a daily driver? Weekend car?

I wanted an overall race feel to my car, and had Darrin build me a mild Jspec trans. $1500 later, my car shifts super crisp and very quick. WOT runs get my tires spinning pretty hard at ~60 mph, 2-3 shift!

Cant go wrong with Darrin built trans! It will long outlast the car, at a lower cost than a full rebuild of the junk stockers.
Thats exactly what I want, I mean its a daily driver car but I would still like a lot of performance out of it.
 

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Um, I thought the chip tuning to firm up shifts was supposed to increase the life of the transmission. Is that incorrect? I may be second thinking that mod. I can't afford a new tranny as well.
 

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My 97 would shift out of park just fine in Florida untill I spent a winter in New York. Had about 120,000 on it at the time. In the cold weather it refused to shift out of park untill it warmed up. If I turned the heater on and blew warm air to the floor for a 15 minutes it would come out of park like brand new. Been a few discussions on this but no real solutions. It does not effect to transmission shifting when in gear. But then again I did experience some shudder soon after and found that switching to Merc V did solve the shudder problem. I have since replaced the whole shooting match since I plan on keeping the car.
 

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Um, I thought the chip tuning to firm up shifts was supposed to increase the life of the transmission. Is that incorrect? I may be second thinking that mod. I can't afford a new tranny as well.
Don't worry, a good tune from someone like Lonnie won't cause a transmission to go bad.

If the transmission fails it was going to do it anyway. I think its probably the "This is a blast!" style of driving on a car with a new tune is what the killer is. LOL

Darrin
 

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Replacing the transmission for a minor shudder still won't fix the "can't shift out of Park issue". That is going to be the shift interlock more than likely. Someone spilled half a can of soda in mine, and it did that for awhile until I got it all cleaned up. I had a week of shifting it to Neutral with it off, starting it there until I could take it apart and clean it up.

When does it shudder? You have tried a 7 dollar bottle of tranny shudder fix or have Mercon V in it already?
 

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Hey guys, well the transmission in my car seems to be going. I've got 138,000 miles on it. Every time its cold its hard to shift out of park, its starting to shutter now and then but it hasn't slipped yet. I just think its going to go pretty shortly. Anyway I've been looking around trying to see what my best bet is on a new trans and I stumbled across a few things on ebay. But Im not too sure about the swap.

Heres what I came up with on an egay search
http://search.ebay.com/4R70W_W0QQ_trksidZm37QQcatrefZC6QQfromZR10QQfsooZ2QQfsopZ3QQftrtZ1QQftrvZ1QQsacatZQ2d1QQsaprchiZQQsaprcloZQQsbrsrtZd

But what would I have to do to swap this trans into my car
http://cgi.ebay.com/ebaymotors/4R70W-Ford-Mustang-Thunderbird-Automatic-Transmsision_W0QQcmdZViewItemQQcategoryZ33727QQihZ006QQitemZ160120764319QQrdZ1

I mean will it just bolt right up or what? Im definately a noob when it comes to this, thus why I have turned to ya'll for help.

Any info is greatly appreciated,
thanks guys.
:tongue:

Mikey, did you switch to mercon v yet? Ford had a bulletin out for torque converter shudder on the tbird. Mercon V is supposed to help it or practically eliminate it.

Switching the trans out isnt hard to do, but I'd rather try to get the most out of it untill its "done." Save your money ma man.
 

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Discussion Starter #13
Mikey, did you switch to mercon v yet? Ford had a bulletin out for torque converter shudder on the tbird. Mercon V is supposed to help it or practically eliminate it.

Switching the trans out isnt hard to do, but I'd rather try to get the most out of it untill its "done." Save your money ma man.

Yeah I hear ya, but no I havent switched to Mercon V yet, Ive just been affraid to do anything to it yet because Im worried about how the trans will react. Its definately got some more miles on it, but I can definately tell it isnt performing like it used to. But as far as shifting out of park, it only gets really bad in the winter, but after my car warms up and I drive around for a little bit, it works a hell of alot better.
 
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