• Register Today It's free! This box and some ads will disappear once registered!

^^Searches ExplorerForum.com^^

For all you M5OD swappers. . .


JC3006

New Member
Joined
May 14, 2020
Messages
2
Reaction score
0
City, State
Kentucky
Year, Model & Trim Level
1991 Explorer Sport
Hey guys. I'm debating an M5OD swap sometime later this year, but I want to get all my ducks in a row before I even consider it. I have a 91 Sport A4LD/1354E which I've been slowly rebuilding. The trans still does "OK" but I'm starting to drive this truck farther and farther away from home on little roadtrips, and the aging slushbox is always in the back of my mind. . . I hate the thought of being broken down and stranded.

Anyway, I picked up a cheap 94 Sport for parts, with M5OD and 1354E. It has 150K miles, runs great and SEEMS to shift good as well (it is complete minus the rear differential, so I can't actually test the trans).

My question concerns the ECM. I know I can't use the 94 ECM in my 91 truck, but the major issue is that I simply can not located a 91 manual ECM anywhere near here. I work at a NAPA Auto, and I would typically just order a "new" remanufactured ECM, but there is a whole laundry list of possible ECM calibration codes, and I'm not sure where to start.

F17F-VA
F2PF-ZA
F07F-ZA
F17F-XA
etc, etc, etc. . .

I assume some this concerns power windows/locks, Electric shift Tcase, Cruise Control, etc. . . Does anyone know how to read/decipher the factory ECM codes?

Also, it will get a new LUK clutch kit and all new clutch hydraulics. Is the metal 1991 style Slave Cylinder preferable, or the plastic bodied 1994 stye? Also would you guys recommend LUK hydraulics or stick with new OEM ford parts? In recent years I M5OD swapped a Bronco II, which was fairly easy, so I'm no stranger to this, but I wasn't nearly as particular about the BII. This truck is very special to me, reliability is KEY, and I want it to look/perform like it was a 5 speed from the factory, no shortcuts on this one.

Sorry for the long post. Thanks a bunch for any help.

Explorer.jpg
 


Join the Elite Explorers for $20 per year. Gets rid of the ads! New $5 per month option.

Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose fix problems yourself and learn which modifications work without having to experiment on your own. Elite Explorer members see no advertisements, no banner ads, no double underlined links, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create and save more private Conversations, and more. Join Today. Your support is greatly appreciated.




Rick

Pumpkin Pilot
Staff member
Admin
Elite Explorer
Joined
February 8, 1999
Messages
32,105
Reaction score
1,013
City, State
Wayoutin, Aridzona
Year, Model & Trim Level
'93 XL Pumpkin Edition
Callsign
AB7FH
I don't think you will have an issue using the stock automatic ECM with the manual transmission. It's when you go the other way that there would be issues.

Hopefully someone else can confirm that.
 




MrQ

Smokey the clutch is; Missed shift you did
Elite Explorer
Moderator Emeritus
Joined
October 5, 2008
Messages
3,043
Reaction score
318
Location
Humid, Damp, and Hot
City, State
Houston, TX
Year, Model & Trim Level
'98 EB, '93 Limited
You can use an auto PCM. You will need to tie the neutral position switch of the manual into the park neutral position harness of the auto. The PCM will also throw 2 or 3 codes at you, basically dealing with the TCC lockup and 3/4 OD that it will no longer see.

Also, from experience, the engine will idle higher with the manual since it is tuned to compensate for the load of the torque converter. Fortunately these PCM's are pretty dumb so as long as you don't mess with any sensor directly related to the engine (which you shouldn't need to do), it'll run just fine with the manual.

If you can find a 92 manual PCM, that will also work. The ones that are the hardest manual PCMs to source are for the non Cali '93s (2 O2 sensors, no EGR, no Camshaft positions sensor, different PWM for the injectors, no barometric sensor), so you can't use a 91,92, or 94.

Also, Ford sourced LUK clutches for the manuals, so they are OEM without the Motorcraft markup.
 
Last edited:








yostyexplorer94

Yost Offroad
Staff member
Moderator
Elite Explorer
Joined
September 6, 2006
Messages
678
Reaction score
126
City, State
South Central PA
Year, Model & Trim Level
1994 Explorer
Callsign
yosty
I ran the 1994 auto factory computer with my m5od for several years and there were no ill effects. I swapped a 1994 manual ecu out of a 2 door sport and I personally did not notice any change in engine idle or engine braking. Others have reported a difference though so your results may not be the same. In my experience, you can definitely and reliably run the auto computer. It will always have (if I remember correctly) two "soft" codes that are visible with a code scanner. They Do Not turn on the check engine light. I ran like that for years.
I had read that the "soft" codes can be corrected by removing two solenoids from the auto trans and wiring them in to "trick" the computer to thinking everything is copacetic. I never found it necessary so I did not try it.

If you have not read through this thread, al4d to m5od swap it is worth a read. It should have most everything you need to know. I fixed all the pictures awhile back so they should be there.
 




410Fortune

Flood Season
Staff member
Moderator
Joined
August 3, 2000
Messages
25,110
Reaction score
1,310
City, State
NORTH IDAHO, 7B
Year, Model & Trim Level
B2 "Slightly" Modified
yes you can use resistors to fool the pcm into thinking the auto is still present and remove the"soft codes"
DO NOT USE CHEAP HYDRAULICS
LUK or FORD only.........
 
  • Like
Reactions: imp




ghosttrain2

Elite Explorer
Joined
April 7, 2008
Messages
437
Reaction score
37
Location
Winnemucca,NV
City, State
Winnemucca,NV
Year, Model & Trim Level
1986 Bronco 2 XLT
I sort of did this in my Bronco 2, installed a 1994 4.0 from an Explorer parts rig I have, that had a bad A4LD, bought a M5OD, and converted it. I used a ECM from a 1994 Explorer with a M5OD, Part #s F47F-12A650-KB or F47Z-12A650-KB, with Federal emissions. If you need a CA emission one, look for a F47F-12A650-CTA, or F47Z-12A650-CTA. The part numbers can be found on Rock Auto's site. I bought mine on EBAY, but you can also look on Car-Part.com.
 




shran

Elite Explorer
Joined
March 26, 2019
Messages
118
Reaction score
65
City, State
South Dakota
Year, Model & Trim Level
1992 Explorer XLT
I also used an auto trans ECM on a 4.0 swapped Ranger I built a few years ago... it came from a '94 Explorer and I put an M5OD behind it. Worked fine other than the codes present - may be a problem if you have to pass emissions but won't affect how it runs.

I'm not sure why there are so many variants of ECMs available. I'm guessing there were simply a lot of revisions made to the software, probably early ones (F0xxxxx) mid year (F1xxxx) and late 91's (F2xxxx.) Functionally they are all probably very similar, just a matter of finding one for your vehicle that is programmed for a manual trans... any '91, '92 manual trans 4.0 ECM should work.
 




Similar threads











Top