T-45 to T-3650 transmission swap? - Mustang Evolution

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Old 10-06-2013, 10:16 PM   #1
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T-45 to T-3650 transmission swap?

What all would have to be done for this swap? Let's assume I have the 3650 but that's it.. There's one here for cheap with only 30k miles on it I was gonna pick it up do I need Anything else??
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Old 10-07-2013, 09:19 AM   #2
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A 1996-1998 T-45 can be replaced with either a 1999-2001 T-45 or a 2001-2004 TR3650 but the speedometer output on the 99-up models is OSS only which means you need a speedcal box to convert from OSS to VSS.

A 1999-2001 T-45 can be replaced directly with a 2001-2004 TR3650.

The reverse light switch from the T-45 is retained when converting to a TR3650.

The TR3650 uses a completely different shifter than the T-45 so you will need a new shifter.

The TR3650 has internal stops so you DO NOT set the stops on an aftermarket shifter.

If you've got an 01 GT then it is a direct swap minus the shifter.
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Old 10-07-2013, 09:36 AM   #3
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Quote:
Originally Posted by scottydsntknow View Post
A 1996-1998 T-45 can be replaced with either a 1999-2001 T-45 or a 2001-2004 TR3650 but the speedometer output on the 99-up models is OSS only which means you need a speedcal box to convert from OSS to VSS.

A 1999-2001 T-45 can be replaced directly with a 2001-2004 TR3650.

The reverse light switch from the T-45 is retained when converting to a TR3650.

The TR3650 uses a completely different shifter than the T-45 so you will need a new shifter.

The TR3650 has internal stops so you DO NOT set the stops on an aftermarket shifter.

If you've got an 01 GT then it is a direct swap minus the shifter.
this is what I was looking for , driveshaft the same? id pick up a MGW so the shifter wouldn't be a big deal. im just looking around to maybe have a spare trans laying around.
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Old 10-07-2013, 08:35 PM   #4
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Quote:
Originally Posted by scottydsntknow View Post
A 1996-1998 T-45 can be replaced with either a 1999-2001 T-45 or a 2001-2004 TR3650 but the speedometer output on the 99-up models is OSS only which means you need a speedcal box to convert from OSS to VSS.

A 1999-2001 T-45 can be replaced directly with a 2001-2004 TR3650.

The reverse light switch from the T-45 is retained when converting to a TR3650.

The TR3650 uses a completely different shifter than the T-45 so you will need a new shifter.

The TR3650 has internal stops so you DO NOT set the stops on an aftermarket shifter.

If you've got an 01 GT then it is a direct swap minus the shifter.
Scotty out of curiosity can you use the vss out of our years on the 99-01 t45. I mean id the speedogear ideally the same or is the number of teeth different from 94-98 to 99-01?
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Old 10-07-2013, 09:06 PM   #5
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You'd need to swap the tailshaft and the drive gear out of a 96-98. The tailshaft housing on the new transhould still have the vss bung but it will be plugged up. If not just swap your housing too. Heck, some of them, like the 99-up autos will still have the VSS drive gear in there already, just have to look in with a flashlight to see. During the transition years, Ford just used whatever they had on hand. Good example is a very few 01 Cobras had Teksid blocks that were leftover even though the WAP was already in production.
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Old 10-07-2013, 09:43 PM   #6
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This cant be done to the 3650 can it? Probably diff tailshafts or housing. Was debating on swapping over tranny since mines at 124k miles on the tranny and i doubt a jmod will extend her life cause shes slipping a bit
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Old 10-08-2013, 07:25 AM   #7
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Nope, with a 3650 you get a speedcal and convert the OSS to VSS. I'm actually testing the waters for a good 3650 right meow myself. If I can find a clean lower mileage one for the price I want to pay I'll do the swap too since I already have a speedcal and the 3650 is stout as hell. Also the .62 overdrive is nice.

Benefits of the 3650 over the T45:

-ALL of them got the upgraded blocker rings
-Aluminum Forks
-Internal stops (no bent forks)
-BEEFY gears

Benefits of the T45:

-Single rail shift mechanism
-99 and later versions got the upgraded blocker rings too
-Can swap an upgraded one into an earlier car without having to do the OSS thing

I personally think the 3650 with the .62 overdrive is the way to go for any stick shift modular. Almost everyone who mods does gears so should have a speedcal already so its easy.
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Old 10-08-2013, 01:37 PM   #8
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Well scotty as always great info on it. Lmk if you do the 3650 im curious as to how it will turn out
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Old 10-08-2013, 01:54 PM   #9
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It'll just be a straight swap literally, I won't even change the clutch just the TOB and pilot. Then mess with my speedcal to convert the OSS to VSS and use my phone's speedometer app in the meantime. Or I'll rebuild my T-45 and call it a day. All depends if that billet shift fork group buy on the Corral ever becomes a reality again.
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Old 10-08-2013, 02:19 PM   #10
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Quote:
Originally Posted by scottydsntknow View Post
It'll just be a straight swap literally, I won't even change the clutch just the TOB and pilot. Then mess with my speedcal to convert the OSS to VSS and use my phone's speedometer app in the meantime. Or I'll rebuild my T-45 and call it a day. All depends if that billet shift fork group buy on the Corral ever becomes a reality again.
What's it cost to rebuild a trans?
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Old 10-09-2013, 09:33 AM   #11
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$500 for a rebuild kit for my T-45 and then around another $150 for the Forks but I have to call to see if those are the upgraded ones or the stock ones. If stock that is a big hell no. There is a guy who frequents the bigger forums who does custom billet forks for $300. The catch is its a group buy only thing because he won't make any money on them unless he does X many.

This is what billet fork looks like vs stock.



Then its just a matter of tearing it down and getting a few bearing pullers/claw pullers and getting creative so I don't have to buy another $400 of specialty tools to get the damn thing apart.
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