4R70W compability - TCCoA Forums
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post #1 of 5 (permalink) Old 09-08-2016, 08:10 AM Thread Starter
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4R70W compability

Hi everyone! New to this forum and I'm looking all over the net for info. I bought a 95 T-bird LX 2 months ago and it has that dreadful converter shudder. So it's either a rebuild of the trans and getting a new converter or getting another transmission. Luck has it that I found a junkyard that has a transmission from a 04 Mustang GT and I was wondering if it would fit or not since both cars has the sohc 4.6l.
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post #2 of 5 (permalink) Old 09-08-2016, 09:10 AM
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It will physically bolt up, but you will have a few issues to deal with. First off, you will have to get the flexplate out of the 04 Mustang as well, since the torque converter in the Mustang uses a smaller diameter bolt pattern than the tbird. Second, you will need to swap your shift lever, MLPS sensor, and EPC solenoid from the tbird trans into the Mustang unit. Third, you will need to re-pin the main connector to match the Mustang pinout. And finally, the 04 trans uses a magnetic pickup for the speed sensor instead of a drive gear, and this results in different pulse counts per revolution, so you will need to get an extended range speedcal to adjust the signal.

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post #3 of 5 (permalink) Old 09-08-2016, 11:53 AM
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Quote:
Originally Posted by pnilz View Post
Hi everyone! New to this forum and I'm looking all over the net for info. I bought a 95 T-bird LX 2 months ago and it has that dreadful converter shudder. So it's either a rebuild of the trans and getting a new converter or getting another transmission. Luck has it that I found a junkyard that has a transmission from a 04 Mustang GT and I was wondering if it would fit or not since both cars has the sohc 4.6l.
Have you tried draining the fluid in the transmission and the torque converter and refilling them with Mercron V transmission fluid?
Converter shudder is often just old fluid.

Otherwise, if the transmission shifts ok, I wouldn't go through the bother of replacing it. A replacement "stock style" converter isn't very expensive, and you can always get one that would be stock on the Lincoln Mark VIII, Mercury Maurader, etc that would bolt right up and have a slightly higher stall speed for a little better get up and go.

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post #4 of 5 (permalink) Old 09-08-2016, 05:54 PM
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That 04 is going to not work for you a whole lot more than it will. Too much to address to make it compatible.

D

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post #5 of 5 (permalink) Old 09-09-2016, 02:29 AM Thread Starter
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Hey guys, and thanks for the replys. I think I'll just drop the idea of getting a new gearbox. Can't say that I have any problems shifting, except that the turbine is kinda loud in first gear and it makes a funny noise if I pop it in neutral. I think I'll just start with getting new Mercon V fluid in it and if it doesn't work, maybe just getting a new stock style converter might work.
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