Anyone put a Tremec 3650 in a 96-98 GT ?

WayneStang98 · June 10th, 2009, 09:55 AM

I have been searching for some answers to a couple questions I have. I got a killer deal on a complete PI engine & TR3650 pkg. I am hearing the TR3650 trans mount holes are about 1" farther back on the crossmember. I don't want to hack & weld. Will a crossmember from an 03-04 gt bolt in place of the original one? My T-45 is a mechanical speedo, the TR3650 is electronic. How can I make this work? Is there some sort of conversion kit/ converter box? I hope to figure this sh** out, the swap is scheduled for 6/20. Thanks for any help.

BAzombie · June 10th, 2009, 09:34 PM

You can try asking in the '99-'04 section. There's a little more traffic there, plus you are asking about a motor and tranny from their years. They wont mind.

Traidmarx · June 10th, 2009, 11:42 PM

easy fix is to pick up the motor if it is in fact a great deal, bolt your t45 to it and sell the Tremec for 600 and get some bolt on's for the new PI motor.

330CubeGt · June 11th, 2009, 01:42 AM

It will Fit.And there is a Way to convert it,94-04 chassis wise are the same.

WayneStang98 · June 23rd, 2009, 08:13 AM

Thanks for the responses, been away for a bit.

330CubeGt · June 23rd, 2009, 08:28 PM

Originally Posted by WayneStang98

Thanks for the responses, been away for a bit.

Its Realy Not that hard.you can Swap out the Extention housing to use yours to solve your speedo issue other then that its pretty easy to swap over.Never done it but i have read about it, Cant be to hard i just did a 5 speed to auto swap and it was Easy...

atrains-gt · July 9th, 2009, 06:28 PM

I have a t3650 in my '98 gt. The crossmember needs moved back a little, that was it, and you need an extended range speedcal to make the electronic speedo work.

fsttang96 · July 9th, 2009, 10:27 PM

Originally Posted by atrains-gt

I have a t3650 in my '98 gt. The crossmember needs moved back a little, that was it, and you need an extended range speedcal to make the electronic speedo work.

Where do you get that Extended Range speedcal

atrains-gt · July 9th, 2009, 10:58 PM

I bought mine from Dallas mustangs. American muscle sells them too. Just make sure you get the "Extended Range", not the original version.

mmikeclass06 · July 9th, 2009, 11:10 PM

Originally Posted by atrains-gt

I bought mine from Dallas mustangs. American muscle sells them too. Just make sure you get the "Extended Range", not the original version.

OR you can spend NOTHING pull your tail housing off with like 8 bolts. pull off one snap ring. pull off your old plastic gear from your t-45. then install it on new one. its FREE. takes prolly 30 minites to swap both and put back together...... if you need a write up ill make one. it can even be done with tranny still in car..

atrains-gt · July 9th, 2009, 11:15 PM

Originally Posted by mmikeclass06

OR you can spend NOTHING pull your tail housing off with like 8 bolts. pull off one snap ring. pull off your old plastic gear from your t-45. then install it on new one. its FREE. takes prolly 30 minites to swap both and put back together...... if you need a write up ill make one. it can even be done with tranny still in car..

I didn't realize that was possible. I already had a speedcal so I didn't spend anything.

sxynerd · July 9th, 2009, 11:43 PM

The trans cross brace will need to be modified but it will go in. And like they said, the SpeedCal will work. (But not very well, lol.)

atrains-gt · July 10th, 2009, 01:06 AM

The trans cross brace will need to be modified but it will go in. And like they said, the SpeedCal will work. (But not very well, lol.)

The speedcal won't work very well, or the trans won't work very well? The 3650's are trash transmissions in my opinion, but the speedcal has been perfect.

sxynerd · July 10th, 2009, 01:49 AM

75% good 25% bad responses on the SpeedCal and about 1/3 of the people try to return them. (I Have a friend that works for THR.)

3650 is a better trans than the T45 no matter your personal experience. the parts are cheaper, changeable bell housing and it can be built better for cheaper.

If someone is dead set on building up a T45 they better do it soon since Tremec doesn't make parts for them anymore and VERY soon, the first run production parts are going to be replaced with Japanese parts.

atrains-gt · July 10th, 2009, 02:19 AM

I think both the t45 and the t3650 are trash. I don't think either one is particularly better than the other, as far as durability goes. The design of the 3650 might be better, but it's full of problems as well. Just my opinion.

sxynerd · July 10th, 2009, 05:56 PM

Originally Posted by atrains-gt

I think both the t45 and the t3650 are trash. I don't think either one is particularly better than the other, as far as durability goes. The design of the 3650 might be better, but it's full of problems as well. Just my opinion.

Yeah, I understand that. And I agree that neither are GREAT Trans.

fsttang96 · July 10th, 2009, 06:27 PM

Originally Posted by mmikeclass06

OR you can spend NOTHING pull your tail housing off with like 8 bolts. pull off one snap ring. pull off your old plastic gear from your t-45. then install it on new one. its FREE. takes prolly 30 minites to swap both and put back together...... if you need a write up ill make one. it can even be done with tranny still in car..

mmikeclass06 I would like to see the write up. We just did a tranny swap on my buddys 96 Cobra and put in a 2002 tranny and my 96 GT also hase a 2002 tranny and we have the speedos unpluged and now when we come to a stop sign the cars stall ! I would like to see how hard it is to swap the tail housing !!!

mmikeclass06 · July 10th, 2009, 07:39 PM

Originally Posted by fsttang96

mmikeclass06 I would like to see the write up. We just did a tranny swap on my buddys 96 Cobra and put in a 2002 tranny and my 96 GT also hase a 2002 tranny and we have the speedos unpluged and now when we come to a stop sign the cars stall ! I would like to see how hard it is to swap the tail housing !!!

im at work rt now. ill take pics and stuff tonight. ill have to find other pics cause im not gonna tear my tranny down. but in mean time you can also search the web for it. i have the link at home to a small write up. as long as you are semi machanical

mmikeclass06 · July 10th, 2009, 07:42 PM

and as far as t-45 vs the other. tear the t-45 down and look at the parts. agiant the t-5 that came out of my 3.8 v6. the t-45 is tinny brittle compared to even the t-5 if you have the money. swap a t-56 in there not that hard

Joey-D · November 3rd, 2009, 07:37 PM

mmikeclass06 I just got a 98 mustang 4.6 with the tremac and would like to see that right up on the speedometer VSS. Did you ever make it?

June 10th, 2009, 09:55 AM	#1
WayneStang98 Newbie 1998 Mustang GT Join Date: May 2009 Location: RI Posts: 10	Anyone put a Tremec 3650 in a 96-98 GT ? I have been searching for some answers to a couple questions I have. I got a killer deal on a complete PI engine & TR3650 pkg. I am hearing the TR3650 trans mount holes are about 1" farther back on the crossmember. I don't want to hack & weld. Will a crossmember from an 03-04 gt bolt in place of the original one? My T-45 is a mechanical speedo, the TR3650 is electronic. How can I make this work? Is there some sort of conversion kit/ converter box? I hope to figure this sh** out, the swap is scheduled for 6/20. Thanks for any help.

June 10th, 2009, 11:42 PM	#3
Traidmarx Hardcore Enthusiast 1995 Mustang GT SLOWER THAN OLD PEOPLE FUCK..:-( Join Date: Aug 2008 Location: Roanoke,VA Posts: 2,026	easy fix is to pick up the motor if it is in fact a great deal, bolt your t45 to it and sell the Tremec for 600 and get some bolt on's for the new PI motor. __________________ 1995 Mustang GT..4.30's,BBK Longtubes, Off Road X-Pipe,Magnaflow Catback,BBK Intake,BBK Underdrive Pulleys Walbro 255lph pump,accel dizzy,MSD Coil,MSD 8.5 Super Conductors,front sway bar removed, more coming soon.

June 11th, 2009, 01:42 AM	#4
330CubeGt MM Fanatic 1998 Mustang GT 1996 Mustang V6 Join Date: Dec 2007 Location: Orlando Posts: 3,396	It will Fit.And there is a Way to convert it,94-04 chassis wise are the same. __________________ Boosted Auto 5.4 (Stock Specs) 380 @ 4750 RPM 450 @ 3250 RPM If its Fast and reliable, it ain't cheap. If its Cheap and reliable, it ain't fast. If its Fast and cheap, it ain't reliable. Last edited by 330CubeGt : June 11th, 2009 at 01:45 AM.

July 9th, 2009, 06:28 PM	#7
atrains-gt Newbie Join Date: Dec 2007 Posts: 17	I have a t3650 in my '98 gt. The crossmember needs moved back a little, that was it, and you need an extended range speedcal to make the electronic speedo work. __________________ 2004 Comp. Orange Mach 1. With more mods than I can list. 11.59 @ 120mph 1.71 60' on a 100 shot.

July 9th, 2009, 10:58 PM	#9
atrains-gt Newbie Join Date: Dec 2007 Posts: 17	I bought mine from Dallas mustangs. American muscle sells them too. Just make sure you get the "Extended Range", not the original version. __________________ 2004 Comp. Orange Mach 1. With more mods than I can list. 11.59 @ 120mph 1.71 60' on a 100 shot.

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June 23rd, 2009, 08:13 AM	#5
WayneStang98 Newbie 1998 Mustang GT Join Date: May 2009 Location: RI Posts: 10	Thanks for the responses, been away for a bit.

July 9th, 2009, 11:43 PM	#12
sxynerd Regular Join Date: Oct 2006 Location: In Reality, why where do you live? Posts: 438	The trans cross brace will need to be modified but it will go in. And like they said, the SpeedCal will work. (But not very well, lol.) __________________ "I'm your huckleberry"

July 10th, 2009, 01:49 AM	#14
sxynerd Regular Join Date: Oct 2006 Location: In Reality, why where do you live? Posts: 438	75% good 25% bad responses on the SpeedCal and about 1/3 of the people try to return them. (I Have a friend that works for THR.) 3650 is a better trans than the T45 no matter your personal experience. the parts are cheaper, changeable bell housing and it can be built better for cheaper. If someone is dead set on building up a T45 they better do it soon since Tremec doesn't make parts for them anymore and VERY soon, the first run production parts are going to be replaced with Japanese parts. __________________ "I'm your huckleberry"

July 10th, 2009, 02:19 AM	#15
atrains-gt Newbie Join Date: Dec 2007 Posts: 17	I think both the t45 and the t3650 are trash. I don't think either one is particularly better than the other, as far as durability goes. The design of the 3650 might be better, but it's full of problems as well. Just my opinion. __________________ 2004 Comp. Orange Mach 1. With more mods than I can list. 11.59 @ 120mph 1.71 60' on a 100 shot.

July 10th, 2009, 07:42 PM	#19
mmikeclass06 Regular another dahm ford Join Date: Aug 2007 Location: georgetown, tx Posts: 361	and as far as t-45 vs the other. tear the t-45 down and look at the parts. agiant the t-5 that came out of my 3.8 v6. the t-45 is tinny brittle compared to even the t-5 if you have the money. swap a t-56 in there not that hard __________________ 97' 3.8 to 4.6 swap all stock 67' mustang gt coupe 88' ranger, just a clean ass truck 48' jeep cj2 the work hogg

November 3rd, 2009, 07:37 PM	#20
Joey-D Look Ma! My First Post! Join Date: Nov 2009 Posts: 1	mmikeclass06 I just got a 98 mustang 4.6 with the tremac and would like to see that right up on the speedometer VSS. Did you ever make it?

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