Progress thread - GT Auto to Manual Swap (and new seats!)

007

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Jan 29, 2002
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Researching these forums has been really helpful for me, so I'll leave some details of my trans swap to maybe help others down the road.

Car 2001 GT Auto - 1st owner, 60k miles. I bought most of the following parts 10 years ago, and then took a break from modding the car while my kids were young. Back at it now and loving it!

Trans Swap Parts List:

Factory refurb 04 T3650 Trans
MGW shifter
Shifter gasket or silicone
Manual shifter bezel and boot (ebay)
SVT Cobra pedal box (ebay)
Adjustable clutch cable
Ford manual trans spacer plate (LMR)
Bell housing bolt kit (AM)
Ford OEM clutch fork kit
SPEC aluminum flywheel
ARP flywheel bolts (Amazon)
RAM HDX clutch kit
Ford Racing Aluminum Driveshaft (or SR perf from AM)
Stifflers driveshaft safety loop (obv. this is optional)
Ford Racing Diff Cover M-4033-G2 (stock is leaking)
Manual trans wiring harness (MPS)
PCM from a manual car (ebay)
SCT XCal3 (already had this)

While I'm at it, we're throwing some new seats in...


Electrically, I still have to work out how to hook up the neutral safety switch. Advice is appreciated. I dont want to simply bypass it.

I have an aftermarket alarm, so I'm disabling the PATS system in the SCT tune so that the car doesnt puke about the mis-matched PCM.


At this point all of the auto trans parts are out ready to be posted on ebay... Pics soon...
 
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007

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Seats arrived! Headrests a little crumpled from shipping, but should straighten right out. Side bolstering is just right for me... Definitely not as aggressive as a hardcore race seat, but plenty enough to hold you snug. The fake leather looks surprisingly excellent up close.

New seats.jpg
 

ScarletStang

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Aug 16, 2019
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I'm disabling the PATS system in the SCT tune so that the car doesnt puke about the mis-matched PCM.
There's really no need for that. You can keep the stock ecu/pcm, just tell your tuner it's an auto to manual swap. That's what I did.
Electrically, I still have to work out how to hook up the neutral safety switch. Advice is appreciated. I dont want to simply bypass it.
As far as I know, these cars don't have a neutral safety switch, just a clutch safety switch. The car should already have a connector for the clutch switch under the dash. There's a little jumper on a two pin connector above the drivers side kick panel, it's for the automatic cars(I'll add a picture). Plug in the clutch safety switch and unplug the jumper and the car shouldn't start without clutch pushed in. Hope this helps!

20190819_233421.jpg
 
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007

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Jan 29, 2002
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Broke
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There's really no need for that. You can keep the stock ecu/pcm, just tell your tuner it's an auto to manual swap. That's what I did.
Thats really interesting... It seems I have two options:

1. Use the PCM from a manual car, have to disable PATS to make it not puke. Then its a standard tune.
2. Tune the auto PCM to shut off the auto trans functions.

The second option worried me... How does yours perform? Any weird behavior? Idle etc. all normal? I think I prefer this option, but I was concerned that a tune on an auto PCM might never be quite the same as a real manual PCM?

Thanks so much for the help,

D
 

ScarletStang

Member
Aug 16, 2019
13
3
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NC
Thats really interesting... It seems I have two options:

1. Use the PCM from a manual car, have to disable PATS to make it not puke. Then its a standard tune.
2. Tune the auto PCM to shut off the auto trans functions.

The second option worried me... How does yours perform? Any weird behavior? Idle etc. all normal? I think I prefer this option, but I was concerned that a tune on an auto PCM might never be quite the same as a real manual PCM?

Thanks so much for the help,

D
Mine does fine. It's been over three years like that. All the tune will do is turn off the automatic trans part in the ecu. Everything works, idles right, drives nice, cruise control still works etc. When I did my swap, I got all the parts from a junkyard stang including the ecu and gauge cluster, but I ended up just reflashing the auto ecu. Lots of other people have done it this way too. I don't recommend starting the car with the new transmission without the new tune though, it will not like it.
 
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007

Founding Member
Jan 29, 2002
3,269
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Broke
www.steeda.com
Mine does fine. It's been over three years like that. All the tune will do is turn off the automatic trans part in the ecu. Everything works, idles right, drives nice, cruise control still works etc. When I did my swap, I got all the parts from a junkyard stang including the ecu and gauge cluster, but I ended up just reflashing the auto ecu. Lots of other people have done it this way too. I don't recommend starting the car with the new transmission without the new tune though, it will not like it.
Cool. I think I'll try that then. No need to lose the PATS without a reason!

Thanks again

D