[Replica R]

I've looked in the v6 forums and I've searched for a t56 conversions in the v6 forums, yeah ne ways, every topic I've found of a tranny conversion is of someone wanting to swap out a auto for a stick. I'm wanting to put a t-56 into my 'stang and want to know exactly what I have to look forward to. Will it give me any advantages, help distribute hp, any gains in hp, and what all needs to be swapped. I have a t-5 right now.

[SSStang]

Advantages: 6th gear you might save some gas
Hp Gain: its a tranny so no
What to look froward to: An expensive swap


Since you would have 6th gear I would guess you could run a taller gear and still come out with the same gas mileage while on the highway but I don't know if its worth it.

[Replica R]

now would it help acceleration in anyway?

[SSStang]

Originally Posted by Replica R now would it help acceleration in anyway?

If you went with taller gearing yes...

Just switching to a t56 , no...

[Replica R]

so would a t45 be a better bet of going with, I've got a friend with a cobra, 97 I think, he's wanting a different tranny, his would bolt right in or what changes would have to be made for that?

[SSStang]

Originally Posted by Replica R so would a t45 be a better bet of going with, I've got a friend with a cobra, 97 I think, he's wanting a different tranny, his would bolt right in or what changes would have to be made for that?

the 1997 cobra has a t45

[Replica R]

the transmissions in the 99 v6's are t-5's, I'd have to double check my door tag I could've sworn it had a 5 as the first digit under the TR slot.

[SSStang]

Originally Posted by Replica R the transmissions in the 99 v6's are t-5's, I'd have to double check my door tag I could've sworn it had a 5 as the first digit under the TR slot.

Wont fit.

[Replica R]

In order to identify what kind of Mustang transmission you have, you need to check the door tag on your drivers side door jam. If you look down to the bottom right of the tag, you should see an area labeled "TR." Underneath this label there are 5 letters and numbers. The only one that we are concerned with is the first alpha-numeric character which corresponds to your Mustang Transmission.
If you have a 6 as your first digit, you have five-speed manual, T-45 OD Mustang Transmission. This is the standard Mustang transmission that is found in 1996 to Mid 2001 Mustang GTs as well as 1996 to 1998 Mustang Cobras. If you have a 5 as your first digit, your car came with a T-5 OD Mustang transmission. Finally, if you have a K as the first digit in the "TR" code, you have a TR-3650. This Mustang Transmission is found in mid-2001 to 2004 Mustang GT, the 2003 and 2004 Mach1 and the 2001 Cobra. The 2005-2007 manual Mustang GT's also a T-3650.

[Hourofpain]

dude. ?

[itschristorres8]

your car has a t-5
the t-45 are said to be alil bit strong
then tko
then t-56
then g-force =D

[Evil Intent]

(The T-56 is awsome) There are a few misconceptions with the "6th" gear, yes you have an extra over-driven gear, but it is not an extra gear over the 5speeds... in the 5 speeds, 4th is 1:1, and 5th is typically 0.65:1...
i have the Ford Racing Aftermarket version of the T-56 (rated at 440 ft-lbs), 4th is 1:1, 5th is 0.80:1, and 6th is 0.62:1... this means that my 6th is over-driven 0.03:1 more than the T-5 (and my fifth splits the T-5s 4th and 5th). There are two other major benefits to the T-56... on quite a few T-5s, there gear ratios have a huge gap between 1st and 2nd gear... The T-56 is perfectly spaced between all 6 gears... they slowly close, meaning that as you go through the gears, you always shift right in the powerband, and for road racing, you always downshift right where you need to be... There are a few different gearsets available for the T-56 depending on the application, this changes ratios and overall strength, but they are all an improvement over the 5speed (i am a little biased)...
so what does this mean in the real world? in my car (1991) i am running 3:73 rear-end gears and the end result is almost identical to a car running the low 1st gear 5speed with 3:55s. i am also running about the same rpm on the freeway as a 5speed and 3:55s... it is more expensive to buy and a pain in the butt to install, but well worth it in the end... I am always in the powerband, and with 3:73s, i start out the same as a T-5 with 3:55s, but i don't have a huge rpm drop shifting into 2nd. whatever you do, make sure you research to make an informed decision without wasting money.

[SWEET2KSTANG]

the t56 is only stronger than the tko if it is a viper spec. the regular t56 is very very conservativly rated at 440ft-lbs. the tko's are way under rated as well. i personally hate the tall 2.66 first gear in the t56, and will kill 60ft times. that is just out of the hole, everywhere else is great! there is a 2.97 replacement that will cure that problem. the tko's are known to not like high rpm shift's, that too is something that can be fixed. personally i would just build the t5, they are able to be built to hold a lot of power!

[Evil Intent]

not all T-56s have the tall 2.66 1st, the aftermarket version Ford Racing sells (which is the one i have) has the 2.97 1st, 2.07 2nd, 1.43 3rd, 1:1 4th, 0.80 5th, and 0.62 6th.
i appologize for not clarifying, my post above (with the comparison to the T-5) assumed that the T-56 had this gear set. the viper spec has the taller gear ratios (i believe that 1st has the 2.66, and 6th has the 0.50, so if they are all split like mine, you could run a 4.10 rear gear), which help contribute to the higher torque capacity (dont know what it is off the top of my head).

[SWEET2KSTANG]

stock form t56's all have the 2.66. the 2.97 is an aftermarket option, wether its a whole trans or a built/rebuilt trans. the cobras, gto's, f-body, corvettes all have the 2.66 first. i was looking into a t56 for a little bit there, but when i did all the ratio's i changed my mind real quick.

[Evil Intent]

no worries, like i said, just talking about my experience with the aftermarket model, i have not done as much research on the other versions, and couldn't be happier with the setup i have and don't mind sharing what i have learned (gained around two seconds in the quarter with no motor work)...

[SWEET2KSTANG]

2 seconds??? with no motor work??? what else did you do to the car? take out 1600lbs?

[Evil Intent]

well, originally i was running around 16 seconds with a bone stock 1991 vert auto w/2:73 gears (155,000 miles). i swapped to the T-56 and put in an aluminum flywheel (best investment ever) with a spec stage 2 clutch. I took out the back seat and all the sound deadening, but installed a full cage. i did a complete five lug conversion (think 1995 Cobra R, with cloned 1993 Cobra R 17" wheels), and swapped out the 2:73 gears to 3:73 (amazing). i have the stock airbox with a 76mm C&L MAF with their tube, but everything else on the motor is stock (except the exhaust system). I have 1 5/8" shorty headers, a magnaflow high flow cat pipe (smog leagal in CA on 87 octane), and two chamber flows w/ turndowns. the motor has 166,000miles on it now, and i am running about 14.00 (some higher, some lower).

I have found that the end result is more than the sum of its parts... i also went from about 17mpg to 24mpg on the highway. everything i did allowed the engine to operate both more efficiently, and it almost seems at a reduced load. it really feels like it is not working as hard... no chips, stock 10 degrees of timing, and 87 octane....

[TheBusher]

The following is for the Termi T-56. If you shift at the termi's redline (6,500 rpm), then this is what rpm you would be at in the next gear:

1st - 2nd (2.66 - 1.78): 4,350 rpm
2nd - 3rd (1.78 - 1.30): 4,747 rpm
3rd - 4th (1.30 - 1.00): 5,000 rpm
4th - 5th (1.00 - 0.80) 5,200 rpm
5th - 6th (0.80 - 0.63) 5,119 rpm

Compare that to a T-3650 (the T-45 has the same gears 1-4, only 5 is different) from a mid 01+ GT, bullitt, and Mach (assuming car has the same redline, 6,500 rpm):

1st - 2nd (3.38 - 2.00): 3,846 rpm
2nd - 3rd (2.00 - 1.32): 4,290 rpm
3rd - 4th (1.32 - 1.00): 4,924 rpm
4th - 5th (1.00 - 0.62): 4,030 rpm

So IMO, unless you're running huge amount of power, the T-3650/T-45 will out-launch a T-56, but because the T-56's gears are all closer together, it will eventually start runnin' down the T-3650/T-45.

[Evil Intent]

Originally Posted by TheBusher The following is for the Termi T-56. If you shift at the termi's redline (6,500 rpm), then this is what rpm you would be at in the next gear: 1st - 2nd (2.66 - 1.78): 4,350 rpm 2nd - 3rd (1.78 - 1.30): 4,747 rpm 3rd - 4th (1.30 - 1.00): 5,000 rpm 4th - 5th (1.00 - 0.80) 5,200 rpm 5th - 6th (0.80 - 0.63) 5,119 rpm Compare that to a T-3650 (the T-45 has the same gears 1-4, only 5 is different) from a mid 01+ GT, bullitt, and Mach (assuming car has the same redline, 6,500 rpm): 1st - 2nd (3.38 - 2.00): 3,846 rpm 2nd - 3rd (2.00 - 1.32): 4,290 rpm 3rd - 4th (1.32 - 1.00): 4,924 rpm 4th - 5th (1.00 - 0.62): 4,030 rpm So IMO, unless you're running huge amount of power, the T-3650/T-45 will out-launch a T-56, but because the T-56's gears are all closer together, it will eventually start runnin' down the T-3650/T-45.

Youre exactly right, and you would be surprised at how fast you can run em down. They might get the launch, but then they bog down instantly, whereas th T-56 drops you right into the power band through all six gears.