[DiZzyBonne]

What about a TKO-500 or TKO-600?

[dcook_14]

Dammit, I've been mixing up t-45s and t-56s.

Here's a link to the different T-56 specs.
TTC: TREMEC Transmissions

[Jazzer The Cat]

Originally Posted by DiZzyBonne What about a TKO-500 or TKO-600?

I have heard some mixed reviews on these two models, so would do some research if considering either of these.

Jazzer

[dcook_14]

If you switch from a 3650 w/ stock rear gear to a t56 with stock rear gear, you're gonna lose some on the launch. If you switched to a 3.67 (I know they don't make that, just for arguments sake) with the t56 it will be exactly the same first gear as a 3650 with stock gears. So go with some 4.10s with the t56 and it'll be like running 3.73s with a 3650.

Danno hoping that his math is right and stealing Jazzers signoff as well

[Jazzer The Cat]

Danno's got a Jazzer confused......

Take a CLOSE look at all the ratios available for the T-56. Now take a look at the ONLY ratios available for the T-3650/T-5/T-45 (with exception of having a custom built one, of course) and can figure it out.

I installed the #1260 because my T-3650 was dying and HATED (< X10000 ) the mega-gap between 4th~5th gears. I also liked the somewhat taller first gear so also not such a big gap to 2nd.

All that said, the T-56 is not for everybody as most don't seem to mind the gap soo much, but is a pure blessing on 50 MPH roads and 3:55 gears

Jazzer... secure enough for Danno to use his sign-offs

[dcook_14]

Originally Posted by dcook_14 If you switch from a 3650 w/ stock rear gear to a t56 with stock rear gear, you're gonna lose some on the launch. If you switched to a 3.67 (I know they don't make that, just for arguments sake) with the t56 it will be exactly the same first gear as a 3650 with stock gears. So go with some 4.10s with the t56 and it'll be like running 3.73s with a 3650. Danno hoping that his math is right and stealing Jazzers signoff as well

Okay, this post is comparing being in first gear in a T3650 with being in first on a T-56 Model #1260. Everyone rips on the tall first gears of the T-56.

3650 = 3.38 I believe and a T-56 = 2.97. Basically what I meant was that if you just swap in a T-56, you're gonna be hurting your launch a little bit at the strip due to the difference in ratios. Maybe breaking it down this way will help. In first gear:

A T-56 w/ a 3.73 rear gear is gonna behave like a 3650 w/ stock gears

A T-56 w/ a *4.30* rear gear is gonna behave likea 3650 w/ 3.73s

Basically what I'm saying is the tall first gear of a T-56 is easily remedied by a shorter rear gear.

Originally Posted by Jazzer The Cat Danno's got a Jazzer confused...... Take a CLOSE look at all the ratios available for the T-56. Now take a look at the ONLY ratios available for the T-3650/T-5/T-45 (with exception of having a custom built one, of course) and can figure it out. I installed the #1260 because my T-3650 was dying and HATED (< X10000 ) the mega-gap between 4th~5th gears. I also liked the somewhat taller first gear so also not such a big gap to 2nd. All that said, the T-56 is not for everybody as most don't seem to mind the gap soo much, but is a pure blessing on 50 MPH roads and 3:55 gears Jazzer... secure enough for Danno to use his sign-offs

Glad to hear I could use it, that was a one time thing though I don't think I'm knowledgeable enough to have a cool signoff like you do

Anyway, my dream transmission would be a T-56 Model 1260 with the 5th and 6th gears swapped out for the 1806 (Viper spec) 5th and 6th gears. I'd get some 4.30s out back.

My first gear would be shorter than a stock GT with 3.73s (better for launching) but my sixth gear would be taller than a stock GT with stock gears (better for DD). Plus I'd get nice even steps between my first four gears and an extra gear to fill in the gap after fourth.

[Jazzer The Cat]

Yup, the taller first gear seems to be the rub on the T-56 when it comes to lauching, but pepe this:

Take a look at the T-3650/T-45/T-5
3.38
2.00
1.32
1.00
0.68

... now the #1386 T-56
3.36 < nearly identical to the T-3650/T-45/T-5
2.07
1.35
1.00
0.8 < check out THIS bad boy
0.62

... now the #1260 T-56
2.97 < my first gear
2.07
1.43
1.00
0.8 < check out THIS bad boy
0.62


I did some MPH/RPM readings on all my gears before/after my swap. It was impossible to tell via "feel" or by the numbers on any gears except 1st and the new "inbetween" 5th of my T56. I can just about guarantee you would never tell the #1386 T-56 from ANY T-3650/T-45/T-5.

Jazzer... speakin' the gospel to his pepes

PS... Danno is plenty cool enough to run The Jazzers sign off

[dcook_14]

Hey Jazzer,

I was looking at this site TTC Automotive and the 1386-000-025 looks like just about what I want. Same gears as yours for 1-4, a little shorter 5th and a little taller 6th. But the Torque Cap. (I'm assuming that means torque capacity) is only 385 foot pounds. What's up with that? The highest capacity besides the Viper spec tranny is 450... Can these trannys really not handle more torque than that? When my car is all finished in about 5 years I want to be putting out about 700 hp and 650 lb/ft of torque at the crank. Would I have to build these T56s to handle more or what?

[M.P. Cobra Fan]

Nice info jazzer. I always hear/read the same thing. Don't get a T56. Gear ratios suck. Blah Blah Blah. That 1386 fits the bill perfect for me. That will be the way I go if I ever need to replace this 3650 in the car. Those 5th and 6th gears will make for nice 45-55mph highway and interstate driving with my 4.10s as well.

[Jazzer The Cat]

Danno... I would call TTC and speak with Bruce at Modern Driveline. He can tell you TONS more than I can about torque capacity and such. He can also build you the trans with the gears you like with the parts to handle the HP/T numbers of your ride.

He was VERY helpful and well before I committed to buying from him. He must have spent three 10-minute calls with me to help diagnose the issues I was having with my T-3650 before he recommended the T-56 #1260 to me.

Jazzer

[dcook_14]

I'll be sure to give them a call when the time comes. Thanks a lot Jazzer.

[Jazzer The Cat]

word

[huggy bear]

Originally Posted by Jazzer The Cat Yup, the taller first gear seems to be the rub on the T-56 when it comes to lauching, but pepe this: Take a look at the T-3650/T-45/T-5 3.38 2.00 1.32 1.00 0.68 ... now the #1386 T-56 3.36 < nearly identical to the T-3650/T-45/T-5 2.07 1.35 1.00 0.8 < check out THIS bad boy 0.62 ... now the #1260 T-56 2.97 < my first gear 2.07 1.43 1.00 0.8 < check out THIS bad boy 0.62 I did some MPH/RPM readings on all my gears before/after my swap. It was impossible to tell via "feel" or by the numbers on any gears except 1st and the new "inbetween" 5th of my T56. I can just about guarantee you would never tell the #1386 T-56 from ANY T-3650/T-45/T-5. Jazzer... speakin' the gospel to his pepes PS... Danno is plenty cool enough to run The Jazzers sign off

Man I am retared don't understand any of this can anyone explain?? Awesome info though knowledge is power yo!

[dcook_14]

What Jazzer posted are just the different ratios for each gear in the transmissions. Each gear has a different ratio, and that's the point of the transmission. They work kinda like rear end gears. The higher the ratio number, the more zip it's gonna have but the faster it's gonna run out. The lower the ratio number, the faster you're going to be able to go in that gear, but you're going to have to stay in that gear longer (feels like it's less powerful)

The main reason people rip on the T-56 Six speed is because they have a ratio in first gear of 2.97:1 (depending on the model of T-56, there's a bunch of them with different ratio combinations). That means for every 2.97 times the crank goes around, the driveshaft will go around once. The TR3650 (stock 5 speed in my '04) has a first gear ratio of 3.38:1. Higher ratio means better launches for drag racing, so people rag on the T56 with the lower gear ratio.

But what we're saying is that the lower gear ratio in the T-56 can be made up for on the backside by higher rear end gears. Make sense?

[huggy bear]

Thanks man just needed some clarification and its clear now! reps to all yo

[dcook_14]

Also, people don't realize that they can get a T-56 in one of the 1386 models that is basically the exact same thing ratio-wise as a stock mustang trans, except it has the extra gear. It makes up for the huge gap between fourth and fifth on a TR3650. Jazzer posted that little jem


From Jazzer:
Compare the ratios for the TR3650 and the ratios for the T-56 Model 1386.
Take a look at the T-3650/T-45/T-5
3.38 - First Gear
2.00 - Second Gear
1.32 - Third Gear
1.00 - Fourth Gear
0.68 - Fifth Gear (Notice the huge gap between fourth and fifth)

... now the #1386 T-56
3.36 - First Gear < nearly identical to the T-3650/T-45/T-5
2.07 - Second Gear < nearly identical to the T-3650/T-45/T-5
1.35 - Third Gear < nearly identical to the T-3650/T-45/T-5
1.00 - Fourth Gear < identical to the T-3650/T-45/T-5
0.8 - Fifth Gear< check out THIS bad boy, it makes up for the gap that the stock trans has
0.62 - Sixth Gear < nearly identical to the T-3650/T-45/T-5, actually going to get better gas mileage with the lower ratio, but probably not enough to notice

From Danno:
T56>T3650

[huggy bear]

a t-56 is ideal then right? cause of the 6th gear? but its heavier right? Also I looked into getting one like 2 years ago and found that I have to do cross member mods and relocate the reverse light wire. is it worth it in thinking that way? Dcook I know you were talking about the torque rating on the t-56 but I have heard of termis pushing well over 500 plus with the 385 you said that wouldn't make any sense since the termis make 410??

[03_StangGuy]

The weight difference is negligible, as well as the 1st gear difference. The slightly taller 1st will help you not light up the tires when you start putting more power down.

[huggy bear]

negligible??????

[03_StangGuy]

yeah it means a small change the has little affect and you wont be able to notice the change.