2000GT4.6

The "viper spec" which is somewhere around 2600 dollars new has a double, its a .50 final drive wtih a .74 5th gear. All of them have a "double" overdrive though, an overdrive is anything over a 1:1 ratio. The non viper spec just adds a gear (basically) between a 5 speeds 4th and 5th, giving you a better top end above about 115-120 MPH (depending on gearing).

TKO/T56 sticky:

https://mustangforums.com/m_2832353/tm.htm

The TKO is stronger, but the 56 does have that nice .50. One thing to note, I would NOT plan on running a stock gear ratio with a .50 overdrive 56. With a 3.27 rear gear thats going to make for some low RPM on the highway, maybe too low, I would definatly recommend something like a 4.10.

livefast1

pretty much everything i said above, and with the viper specs 2.66 first gear 4.56s would be comparable to people putting 4.10s on a car with a t45.

lizzyfan

[sm=WTFsgign.gif]

livefast1

i was saying he pretty much repeated me, and with the vipers 1st gear being a 2.66, 4.56 rear gears would be comparable to the performance/output of 4.10 gears on a car with a t45.

V8Cody

My T45 crapped out so I decided to put the T56 in, I LOVE it! T56 w/ 4.10's FTW!

If you get the T56, you need a new clutch, flywheel, shorter driveshaft, different yoke, shifter, and a brace.

lizzyfan

Gotcha!
I know they call it double overdrive, but really it's like a .80 ratio in 5th, bottom line is the T-56 is more expensive then the TKO

2000GT4.6

Kinda. The 2nd/3rd/4th gears of the viper 56 are comparable to a 45/56/3650's so you would have a much more agressive and shorter 2/3/4 with the 56. I would have to get the calculator page out to see the numbers, but even a 4.30 will probably tach lower in a 56 with .50 than say a T45 with a .62

livefast1

i was basically just sayin if he stuck with the stock 3.27s with the t56 first gear would be a really looong gear.

TheCrimzonKnight

Yea i get what you guys are saying i was lookin into 4:10s but i was also looking to get a kenne bell sometime in the future but i hear they dont do well with 4:10s

livefast1

yea i believe thatsbecause of the instant boost and great torque that the kb developes, with 4.10s traction becomes limited.