TR3650 / T45 Differences

[BlackDiamond] · Dec 1, 2007

Hey Guys,

I really need some help here.

About a year ago, I did a full engine swap on my car, it used to be a V6, and I got a 4.6 in there now. The 4.6 came from a 1999 car, but the transmission and rear end came from a 2001 car.

I was told from the beginning that the tranny is a TR3650, but recently, I purchased a Steeda Tri-Ax for the TR3650 and installed it in my car.

I noticed first of all that the tranny has the little white cup in the shifter hole, and not the black spider-like attachment. This gave me a slight thought that maybe it is a T45.

Anyways, installed the shifter, it went in fine.. drove the car just fine. One day, pushing it a bit harder, the shifter came OFF the transmission hole. I thought this was caused by badly adjusted stop bolts.

But now, thinking further, maybe my car has a T45?! How the heck can I find out by just looking at the tranny?

I know Ford changed from T45's to TR3650's right in the middle of the production year, so this is why I'm confused.

HELPPPPP!!!!!!

2000fordstanggt · Dec 1, 2007

heres a real quick way. go drive the car and while moving forward at whatever speed push the clutch in and try to put it in reverse. if it grinds its a t-45 with no syncro, if it doesnt grind you have the 3650

[BlackDiamond] · Dec 1, 2007

Cool, I'll give that a try. I'm kinda pissed that I got a TR3650 Tri-Ax on it right now tho

2000fordstanggt · Dec 1, 2007

[BlackDiamond] said:
Cool, I'll give that a try. I'm kinda pissed that I got a TR3650 Tri-Ax on it right now tho

ha, i didnt think that would work.

[BlackDiamond] · Dec 2, 2007

It works just fine, that's my main problem. It's just that it popped out a couple of times since I had it in. So I'm not sure if it was simply due to the fact that the stops were set too far off, or it's because the tranny is NOT a 3650.

I cant even try the reverse thing right now, car is covered under a foot of snow.

Mustang5L5 · Dec 2, 2007

They are two different transmissions.

If you bought a shifter for a 3650, and it bolted on, then it is a 3650. If it was a t-45, then the shifter wouldn't even fit period. The shifter for the t-45 is the same as the old t-5 shifter.

Other than being both made by tremec, none of the parts are interchangable between the two.

If your shifter came off the hole, were the bolts the correct size?

Mustang5L5 · Dec 2, 2007

2000fordstanggt said:
heres a real quick way. go drive the car and while moving forward at whatever speed push the clutch in and try to put it in reverse. if it grinds its a t-45 with no syncro, if it doesnt grind you have the 3650

The t-45 has a synchronized reverse gear.

Mustangs started getting a synchroed reverse back in 1992 starting with the t-5.

http://www.drivetrain.com/fordcarT45.html

Killa · Dec 2, 2007

I think he has T-45 because few thread ago, he show us how to put on revert without grind. So I think its grind in revert on his car. He must have T-45

Mustang5L5 · Dec 2, 2007

To be 100% sure he can crawl under the car and look at the fluid drain port.

On the 3650 it's on the bottom pointing down

on the t-45 it's on the side.

2000fordstanggt · Dec 2, 2007

now im not trying to say the t-45 has no syncro, but thats the impression i was under. why do you have to put it into a forward gear before reverse to avoid grinding then?

Mustang5L5 · Dec 2, 2007

Because it's very crappy.

Best way to tell though is the drain plug location.

Killa · Dec 2, 2007

you can put in 4 then revert, you can put on any gear before, put on revert ( diffrerent people have different way, myself I like put on 4 then revert ), some people put on first before revert just because they want line up the gear to go back when its start.

[BlackDiamond] · Dec 3, 2007

Ok, the drain plug is on the side, but towards the bottom of the tranny. Does it mean its a TR3650?

And Mustang5L5, about the shifter, that doesnt make sense. I've heard that the TR3650 shifter is identical to the T45 one, but shorter. Therefore, if you put a TR3650 shifter in a T45, it will fit, but it POPS out of the hole because its shorter. And this is exactly what has happened to mine.

Of course, putting a T45 shifter in a TR3650 wont work at all, because the T45 shifter would be too long, thus not allowing you to bolt it on. But my problem is the reverse of this.

I created another thread in the hope that one of you guys can read to me the numbers in your stock shifter, maybe that way I can identify it.

Thanks again for all the help so far.

tiptone · Dec 3, 2007

2000fordstanggt said:
now im not trying to say the t-45 has no syncro, but thats the impression i was under. why do you have to put it into a forward gear before reverse to avoid grinding then?

Mine goes into reverse just fine without having to hit a forward gear first.

RandyStinchcomb · Dec 3, 2007

does the trans still have an "ID" tag on it? post the stamping #'s and I'll let you know..........

M.P. Cobra Fan · Dec 3, 2007

if I am not mistaken a 3650 has internal stops. No need to use stop screws. If I am wrong someone please correct me.

2000fordstanggt · Dec 3, 2007

Mustang5L5 said:
Because it's very crappy.

whys that? they used basically the same trans for 20+ years. doesnt the new edge v6 have the t-5?

Mustang5L5 · Dec 3, 2007

2000fordstanggt said:
whys that? they used basically the same trans for 20+ years. doesnt the new edge v6 have the t-5?

20 years?? We talking about the t-5 or the t-45??

The t-5 is still used in the new V6. I happen to like the trans. Simple to work on, shifts awesome and had some strenght issues but been worked out for the newer V6

The t-45 came out in 1996 and was killed off in 2001. No aftermarket version made and only used in the Mustang

Mustang5L5 · Dec 3, 2007

[BlackDiamond] said:
Ok, the drain plug is on the side, but towards the bottom of the tranny. Does it mean its a TR3650?

And Mustang5L5, about the shifter, that doesnt make sense. I've heard that the TR3650 shifter is identical to the T45 one, but shorter. Therefore, if you put a TR3650 shifter in a T45, it will fit, but it POPS out of the hole because its shorter. And this is exactly what has happened to mine.

Of course, putting a T45 shifter in a TR3650 wont work at all, because the T45 shifter would be too long, thus not allowing you to bolt it on. But my problem is the reverse of this.

I created another thread in the hope that one of you guys can read to me the numbers in your stock shifter, maybe that way I can identify it.

Thanks again for all the help so far.

Ah, when you said the shifter popped out, i thought you meant the whole thing came off.

I just measured two shifters. The stock 3650 shifter from my car and the stock t-45/t-5 shifter from my 5.0

3650 = 1.2" from base to pivot ball

t-5/t-45 = 1.5" from base to pivot.

SO the t-45 shifter is longer...noticably longer. I guess all you need to do is compare the stock shifter you took off to the MGW shifter you bought.

BTW, 2001 was a mixed year. Early cars had the t-45, later cars the 3650.

Also BTW, the drain plug on the 3650 points straight down to the ground. Not on side at all. Sounds like you have a t-45

2000fordstanggt · Dec 3, 2007

Mustang5L5 said:
20 years?? We talking about the t-5 or the t-45??

The t-5 is still used in the new V6. I happen to like the trans. Simple to work on, shifts awesome and had some strenght issues but been worked out for the newer V6

The t-45 came out in 1996 and was killed off in 2001. No aftermarket version made and only used in the Mustang

the t-5. i was under the impression they were the same design, kinda like the sn-95 being on the fox platform. ha, the 3650 has it beat already, aside from the shifter linkage and hydraulic clutch on the s197 being different.

TR3650 / T45 Differences

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