Torque Converter Part #

[Rat]

Can anyone tell me what the part # for the 04 Torque Converter is. Everyone says the 04 is a better converter but I can't find any one that has any numbers. I don't want a PI Converter as I had one and when I installed the SC it put the stall speed way higher than I wanted it. Be ok for the strip but the stock is just about right for the terrain that I drive in. I would appreciate it if anyone has researched this any my local dealer says the only way he knows to do it is to pull mine out and check it against the book. That is strictly to get money out of it as I have the part # of the original that Ford changed at about 11K.

Thanks:
Bob :help:

['03BlkMM]

I'm not sure that there is a new PN. It could be that the old part was superceded by the new one when it was introduced. If that were the case then when you go order the TQ conv for your MM you should get the new part. I would like to know this myself as it could be an inexpensive route to a few hundred more RPM's of stall if it is truely a looser converter. I did some searching at the Mach 1 site and it looks as though they may have gotten the different converter in 2004 as well. But I couldn't find much info about it over there either.

[Directedby]

2003 and 2004 have different transmissions.

2004 has a 4R75W. 2003 has 4R70W.

If you order the torque converter for the 4R75W it will be the right one.

[MENINBLK]

2003 and 2004 have different transmissions.

2004 has a 4R75W. 2003 has 4R70W.

If you order the torque converter for the 4R75W it will be the right one.


You NEED to check the TRANS CODE on the Drivers Door label BEFORE you order your converter.
If the code is "R", then you have a 4R75W transmission.
If the code is anything else, than you have a 4R70W transmission.

My Marauder was built 10/31/2003, and has code "R".
So if yours was built before this, I would check the code to make sure you get the right part.
I don't know if there are, but shouldn't be, any fitment/clearance issues with using either,
as long as the front seal, pump shaft, and input shaft are the same for both trannies...

[fast Ed]

The 2004 spec converter, I see listed as p/n 4W1Z 7902 AARM.


cheers
Ed N.

[SergntMac]

When L/M announced the changes for the '04 drivetrain, they included a mention that the TC is an 11.25" unit with a 2800 stall. As I recall it, this is not a change from the '03 specs. The transmission, however, was improved enough to change/add the 4R75W model number, and the changes included a lower 1st gear ratio, enhanced shifting and ECM programming that improved the sluggish response at low RPM. There may not have been any change in the TC at all, just a reguritation of what's in use?

['03BlkMM]

When L/M announced the changes for the '04 drivetrain, they included a mention that the TC is an 11.25" unit with a 2800 stall. As I recall it, this is not a change from the '03 specs. The transmission, however, was improved enough to change/add the 4R75W model number, and the changes included a lower 1st gear ratio, enhanced shifting and ECM programming that improved the sluggish response at low RPM. There may not have been any change in the TC at all, just a reguritation of what's in use?

Everything that I have been able to find lists the 4R75W to have the same 1st gear ratio as the 4R70W which is 2.84.

[SergntMac]

Everything that I have been able to find lists the 4R75W to have the same 1st gear ratio as the 4R70W which is 2.84.
Sorry about your confusion here, seems confusion bites me in the azz too.

Nonetheless, here is the 411 I stored in my head so long ago. Post #47 is 411 from another member, which (of course) is subject to change as L/M overwrites the history of the original 300A Marauder. When it comes to Internet resources, you're only as good as the last guy who posted his version.

I trust post #47 on this 411, considering it's timeliness to the topic when the changes were first announced, examined, and absorbed here. It's much better to read about what was taking place before your eyes, than try to recapture what passed us by so long ago, yes? Here's the specific 411, please read the entire thread for correct context?


notice that 1st gear and 2nd gear are taller ratios, not by much - but new taller 2.82 versus older shorter 2.84 for 1st gear & new taller 1.50 versus older shorter 1.55 for 2nd gear. ALSO noticed that the new torque converter is 11.25" compared to the older 11.5" converter. maybe THE CHANGES are due to a supplier change?

http://www.mercurymarauder.net/forums/showthread.php?t=3466&page=1&pp=40&highlight=transmission+gear+ra tio

Thanks for prompting me to look this up. While I was a new owner collecting facts, I believed that the original 300As came with a 11.50" TC. As time passed, I let this detail slip away from me, mostly due to popular opinions posted here. As the original 300As came to pass, detail about their construction also came to pass. This quote also redirects my attention on specifics I posted ^ there, regarding the origin (and changes to) the torque converter. Guess I remembered the gear changes, but forgot the TC stuff, mostly because everyone else did too.

My bad, eh? Feels good to recover some of our original 300A history, thanks for pushing me towards finding the correct answers.

['03BlkMM]

SergntMac,
I wasn't confused, I was referring to my search results at Google. Maybe you can find something official that actually lists the gear ratios in question? I can see who the confused one is here, if your going by that thread anyway. The thread you refer to says nothing about the actual ratios of the 4R75W in the Ford press release. Its only brought up by one member and he does not cite his sources.

Here is one of the few things I found. Notice the source at the bottom of the info. "Source: Ford 1997-2000 Powertrain Service Engineering Product Guide, Ford 1992-2005 Service Manuals"

http://www.vibratesoftware.com/html_help/html/Ford/Ford_Transmissions_Main.htm

There are several more articles that I found and the 4R75W is listed as having a 2.84 1st gear ratio, I can find nothing "official" that says anything different.

Feel free to keep looking for those correct answers!

[Rat]

That was a good part number Ed we had the 2004 installed last week in place of the 2003. Seems to have a slightly higher stall and according to the Tech the specs were higher (Hp & Torque). Thanks for the help.

Bob



The 2004 spec converter, I see listed as p/n 4W1Z 7902 AARM.


cheers
Ed N.