A ? about going from t45 to t3650

vicstric · February 18th, 2010, 10:35 PM

I have gone through 2 t45's in my 2000 gt. I have a guy trying to sell me a 03 mustang tranny (3650?). I was told I would have to change the crossbar and get a speedometer adapter. ? is are they interchangeable and if so what do i need to switch them out? Please help me I want to buy the 3650 tranny tomorrow morn!!!!!

LGHTNG02GT · February 19th, 2010, 12:40 AM

i think it should just swap right over. your car now has an 10.5" clutch/ flywheel more than likely. the TR3650's have an 11". i think that is the only real difference but the clutches are both 10 spline so i wouldnt see why it shouldnt swap right over. you could get the clutch/flywheel just to be safe though.

RyanGT · February 19th, 2010, 12:43 AM

You can do either flywheel in either of them. And i did the swap when i bought a built one and nothing else needed to be changed. I bought a new flywheel to go with it though (aluminum).

Scott2001GT · February 19th, 2010, 01:10 AM

how you go through 2 man?! They are pretty stout besides the shift forks.

LGHTNG02GT · February 19th, 2010, 01:13 AM

Originally Posted by Scott2001GT

how you go through 2 man?! They are pretty stout besides the shift forks.

some people can break anything you give them. even if its supposed to be unbreakable haha

vicstric · February 19th, 2010, 08:19 AM

at lightning and scott you guys said shift forks....

vicstric · February 19th, 2010, 08:20 AM

said it shift forks

JayC · February 19th, 2010, 12:22 PM

If you're that hard on transmissions going with a 3650 is NOT the answer. Although the shift forks as better the syncros are the weak point and very expensive to replace. Billet shift forks for the T-45 are your best bet. Also proper clutch disengagement is the key to saving the shift forks.

00mustang92 · March 22nd, 2011, 08:36 PM

how high you think it be to get these different shift forks put in... I tore my 3650 out.. twisted off the input shaft.. I think I'm bout buy a t45 and I like it be able to stay the power I'm going to be putting down.

egfconnor · March 22nd, 2011, 11:42 PM

I'd be interested in more info on how to make my shift forks in my t-45 last as long as possible too..

Willy Mo · March 23rd, 2011, 10:28 AM

The 3650 will swap, with a speedo adapter as teh t-45 uses a cable driven speedo and the 3650 is electronic. Also like stated the t-45 uses a 10.5" clutch and the 3650 uses an 11".

Originally Posted by Scott2001GT

how you go through 2 man?! They are pretty stout besides the shift forks.

the shift forks are very weak, but worse are the shifter selector arms. They are stamped steel and break with hard shifting. There are some that have been upgraded by the factory but theres no telling if you have them until you break or tear it apart.

Originally Posted by JayC

If you're that hard on transmissions going with a 3650 is NOT the answer. Although the shift forks as better the syncros are the weak point and very expensive to replace. Billet shift forks for the T-45 are your best bet. Also proper clutch disengagement is the key to saving the shift forks.

this is true, but the 3650 is a little stronger, minus the synchros. But all manual trans can have a synchro go out. IMO its the driver that ruins the synchros.

Originally Posted by 00mustang92

how high you think it be to get these different shift forks put in... I tore my 3650 out.. twisted off the input shaft.. I think I'm bout buy a t45 and I like it be able to stay the power I'm going to be putting down.

from my experience the t-45 billet shift forks are around $200 a piece? JAYC correct me if im wrong.
If you twisted the inputshaft, Look into upgrading it to a 26 spline.

jivepepper · March 23rd, 2011, 11:13 AM

Originally Posted by Willy Mo

The 3650 will swap, with a speedo adapter as teh t-45 uses a cable driven speedo and the 3650 is electronic. Also like stated the t-45 uses a 10.5" clutch and the 3650 uses an 11".

The 99-01 T-45 uses a electronic speedo also. The plug in is just a little different size. Just splice the tr3650 plug on to the wiring harness. The T-45 and the TR-3650 can both use a 11" or 10.5" clutch. I run a 2000 GT 8 bolt flywheel and a 10.5" clutch with a TR-3650. You can either modify the crossmember or get one for the TR-3650

00mustang92 · March 23rd, 2011, 09:29 PM

see I'm going the oppsite way.. I'm putting t45 in mine probably buying tomorrow... Where mine was a t3650... I've been told as long as its a 99 - early 01 t45 everything will bolt right up and you will not have to change a single thing.... is this true??

jivepepper · March 23rd, 2011, 11:16 PM

Originally Posted by 00mustang92

see I'm going the oppsite way.. I'm putting t45 in mine probably buying tomorrow... Where mine was a t3650... I've been told as long as its a 99 - early 01 t45 everything will bolt right up and you will not have to change a single thing.... is this true??

Pretty much a straight swap. Even a 96-98 would fit and run fine, but the speedometer wouldn't work.

00mustang92 · March 24th, 2011, 01:28 PM

I need speedo to work though

jivepepper · March 24th, 2011, 07:49 PM

As long as its A 99+ a t45 it will have an electronic speedo.

00mustang92 · March 25th, 2011, 12:36 AM

ok got tranny today and putting in tomorrow will let you know how goes.

February 18th, 2010, 10:35 PM	#1
vicstric Newbie Join Date: Feb 2010 Posts: 4 iTrader: 0 reviews	A ? about going from t45 to t3650 I have gone through 2 t45's in my 2000 gt. I have a guy trying to sell me a 03 mustang tranny (3650?). I was told I would have to change the crossbar and get a speedometer adapter. ? is are they interchangeable and if so what do i need to switch them out? Please help me I want to buy the 3650 tranny tomorrow morn!!!!!

February 19th, 2010, 12:40 AM	#2
LGHTNG02GT Hardcore Enthusiast 4V swapped '02 GT (2v) 13.9@101 Join Date: Apr 2009 Location: H~Town, PA Posts: 1,757 iTrader: 10 reviews	i think it should just swap right over. your car now has an 10.5" clutch/ flywheel more than likely. the TR3650's have an 11". i think that is the only real difference but the clutches are both 10 spline so i wouldnt see why it shouldnt swap right over. you could get the clutch/flywheel just to be safe though. __________________ BSD 100MPH Club YMR #8975 4v Swap and a little Purple Bottle MM Nitrous Club #7 MM Cobra Club #87

February 19th, 2010, 12:43 AM	#3
RyanGT MM Fanatic 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 4,258 iTrader: 4 reviews	You can do either flywheel in either of them. And i did the swap when i bought a built one and nothing else needed to be changed. I bought a new flywheel to go with it though (aluminum). __________________ 2000 Black convertible GT: KB 15psi, and other goodies... 1971 Datsun 240 z: Header and rebuilt motor. (The DD)

February 19th, 2010, 01:10 AM	#4
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,793 Blog Entries: 1 iTrader: 3 reviews	how you go through 2 man?! They are pretty stout besides the shift forks. __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone

February 19th, 2010, 12:22 PM	#8
JayC Hardcore Enthusiast 2001 Mustang GT Join Date: Jan 2007 Location: Southern Indiana Posts: 1,346 iTrader: 2 reviews	If you're that hard on transmissions going with a 3650 is NOT the answer. Although the shift forks as better the syncros are the weak point and very expensive to replace. Billet shift forks for the T-45 are your best bet. Also proper clutch disengagement is the key to saving the shift forks. __________________ tuned by SPEEDY DYNO 12.41 @ 109 mph w/ CMS stage II cams 11.13 @ 122 mph NX 150 shot Launch soft, shift slow, rev low, stay slow

February 19th, 2010, 08:19 AM	#6
vicstric Newbie Join Date: Feb 2010 Posts: 4 iTrader: 0 reviews	at lightning and scott you guys said shift forks....

February 19th, 2010, 08:20 AM	#7
vicstric Newbie Join Date: Feb 2010 Posts: 4 iTrader: 0 reviews	said it shift forks

March 22nd, 2011, 08:36 PM	#9
00mustang92 Regular 2001,Ford,Bullitt Mustang Join Date: Jan 2010 Location: Leitchfield Posts: 220 iTrader: 0 reviews	how high you think it be to get these different shift forks put in... I tore my 3650 out.. twisted off the input shaft.. I think I'm bout buy a t45 and I like it be able to stay the power I'm going to be putting down.

March 22nd, 2011, 11:42 PM	#10
egfconnor Enthusiast 1999 Mustang GT 14.2@98 Join Date: Jul 2010 Location: Moorhead, MN Posts: 582 iTrader: 2 reviews	I'd be interested in more info on how to make my shift forks in my t-45 last as long as possible too.. __________________ Nitto NT-555's, AR 17x9 Shelby Razors, K&N FIPK intake, BBK Gripp 1.5" drop, Magnaflow catback, FRPP 3.73 Gears and Bama tune WTB MGW shifter, PM me. Selling 3.27 stock gears too!

March 23rd, 2011, 09:29 PM	#13
00mustang92 Regular 2001,Ford,Bullitt Mustang Join Date: Jan 2010 Location: Leitchfield Posts: 220 iTrader: 0 reviews	see I'm going the oppsite way.. I'm putting t45 in mine probably buying tomorrow... Where mine was a t3650... I've been told as long as its a 99 - early 01 t45 everything will bolt right up and you will not have to change a single thing.... is this true??

March 24th, 2011, 01:28 PM	#15
00mustang92 Regular 2001,Ford,Bullitt Mustang Join Date: Jan 2010 Location: Leitchfield Posts: 220 iTrader: 0 reviews	I need speedo to work though

March 24th, 2011, 07:49 PM	#16
jivepepper I Post Entirely Way Too Much Join Date: Mar 2006 Location: Under a sombrero Posts: 5,025 iTrader: 1 reviews	As long as its A 99+ a t45 it will have an electronic speedo. __________________ 665/541 WHP/WTQ 4.6L SOHC 2V ON 93 OCTANE PUMP GAS. NO METH INJ., NO E85, NO RACE GAS, N2O BABY BOTTLES! TRAP=POWER: 11.01 @135, IN SUMMER HEAT, 1350' TRACK, 315/35/17 DR'S

March 25th, 2011, 12:36 AM	#17
00mustang92 Regular 2001,Ford,Bullitt Mustang Join Date: Jan 2010 Location: Leitchfield Posts: 220 iTrader: 0 reviews	ok got tranny today and putting in tomorrow will let you know how goes.

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