Are you running a Tremec TKO-500, TKO-600, or T-56?

[Hurst_Drivelines]

Are you running a Tremec T-56, TKO-500, or TKO-600 in your car? If so, which transmission did you go with and why?
https://i.imgsafe.org/0596266ea8.jpg (http://bit.ly/HurstDrivelineConversions)

[minendrews68]

T-56, traded my Muncie 4 speed straight across for it.

[uppster]

TKO 600, installled in my 69 Chevelle 12 years ago. Back then there was not any other 5 speeds that would work behind a 548 pump gas motor. I had a Doug Nash in my 32 roadster, but wanted an overdrive for the Chevelle.

[RT_66_Pro_Touring]

I don't read many people listing two overdrive gears as a large factor in their decision making. Price, size, weight, Tq rating and smooth shifting tend to all come up in these discussions, but rarely the gap between 4th and OD.

Any thoughts? There might also be a "cool" factor to a 6-speed vs a 5 speed, right?

I'm currently in the middle of this thought process. My application is a 3200#car with +/- 340 rwtq, 3.73 rear, 25.6" tall tires and .59 or .64 OD.

[T_Raven]

I have a t56 in my 01 TA. I swapped one into my 89 TA. I'm working on swapping f-body t56s into my 69 Firebird and 68 Camaro.

I'm using them because they are stong and I was able to get them much cheaper than any aftermarket trans.

I have a close ratio t56 Magnum for my 67 Firebird.

I like the gear spread and OD ratios of the f-body t56. I thought it was a little odd that Tremec used the shorter ODs in the close ratio Magnum, and the tall ODs in the wide ratio Magnum when the GM t56s and TR6060s are the other way around.

I was hoping to buy a cheap Vette TR6060 and convert it into a Magnum, but it's basically not possible to get one cheap enough to be worth the effort. They are actually a reasonable price for a brand new 6 speed that can handle the power they do.

I have no desire for a 5 speed, but I'd consider a TKO-600 as an easy direct swap into a 4 speed car, if I didn't want to go to the trouble of swapping in a t56.

[ADY]

I purchased my 68 Camaro with a t56, but considering my engine is only pushing 520hp/505lbs, the tunnel cutting, and even with a 4.10 rear I rarely get to 6th gear in the hills (and traffic) around the Bay Area I would have been happy with a TKO-600.

[glassman]

T-56 in the blue car (magnum'ized). Only use 5 gears local, but I've done three Goodguys road tours and have used the snot outa sixth, 540 hp, 3:73's, and in sixth at 80, 23 mpg....but didn't tunnel (2nd gen f body) and may need too...I think I'm at 5* down now and need to come up?

[raustinss]

T56 magnum because it was a good deal from the guy I bought my engine from . Having said that it's exactly what I would have chosen regardless. Reasons being .6 gears fun to shift and double overdrive to get some fuel mileage . Parts are available everywhere. Strong. Reliable.

[68Cuda]

T56 Magnum. The close ratio has the spread I want and will work well with the Double OD and a 3.90 rear axle here in Texas where the 70mph speed limit is common even in town and there is an 80mph speed limit on a few highways I frequent. I have owned several 68-70 Mopar muscle cars with the A-833 with the 2.66 first gear. The 1-4 ratios are almost the same as my beloved old A-833. Anything much lower ratio than that with a big block in my 3200lb car would be too short.

The transmission can handle my 600hp 440ci engine which has a 7500rpm redline. The synchros are supposed to be a step up in the T56 Magnum. I have driven 2 cars with OEM TR6060 transmissions, I like the way they shift.

The TKO 500 is not rated to handle my engine. The TKO 600 is close.
VSS output for my EFI controller is a definite plus and the mechanical speedo drive turns my "stock" refurbished 150mph speedo.

I was going to have to cut one way or another to fit it in, the size difference didn't play in at all. Bonus is that the shifter location was close enough I was able to use the factory 4 speed top plate on the factory console by relocating the console rearward about an inch or so. Looks almost like a factory 4 speed.

[vstol]

I went with a TKO 600 5spd behind my LS 427 (618 hp/580 tq). Only now that I am ready to go for its madden voyage it will not shift sitting or when the engine running. Any ideas?
Thanks

[Tech@HurstDrivelines]

I went with a TKO 600 5spd behind my LS 427 (618 hp/580 tq). Only now that I am ready to go for its madden voyage it will not shift sitting or when the engine running. Any ideas?
Thanks

Hello Vstol,
This sounds like your clutch is not engaging. Are you running hydro set up or mechanical clutch set up?

[SSLance]

T56 take out from a 1994 Camaro. Chose it because it mated right up to my one piece rear main seal SBC and it fit right into my trans tunnel with just a little hammering.

With a 350 rear gear and 25.5" tire it works out great, plenty of close ratio gears down low and will cruise at 80 mph at 1800 RPM in 6th.

[SlowProgress]

I probably thought about it way too much. I knew I wanted a new Magnum for strength and I was already planning to cut the tunnel for easy of service. I loved driving the car with the Muncie for so many years (with 4.56 gears) that I figured it would be fun to pick a transmission and rear ratio somewhat close to the original gear ratios. I know it is weird but I used to enjoy starting in second and then just shifting straight to fourth with the deep rear ratio. I built a little gear calculator and messed around with the numbers.
The wide ratio (TUET11012) first four gears lined up closest to the original Muncie wide ratio gear ratios, coupled with the new 3.90 rear gear.

Then I looked at highway speeds and figured I want to cruise the heck out of this car and the roads are long and straight out here in the west. It was easy to select the wide ratio with the .5 final ratio to keep the RPM below 2,000 at 75 MPH.
If the car runs out a steam too early on the Auto-X then I can always select a higher gear ratio like 3.70 or 3.5.

http://i.imgur.com/MlCTxERl.jpg

[vstol]

Hyd clutch and looks like I got it thanks

[CapSS92]

TKO 600 cause I wanted to be able handle any kind of engine I threw at it plus I wound up getting a killer deal on one with 600 miles. 25000 miles later still running strong.

[gnx7]

This is a great gear ratio calculator:
http://fitbodyshop.net/gear/index.php

I love the close ratio 5speed TUET11009 with .63 overdrive. Select CTSv Gen2 on that calculator for these ratios. Otherwise just input the gearing manually. The gearing is just about perfect as you can see by the graph and chart. A little more overdrive would be nice... one rarely uses 5th gear on a road course anyway and 1-4 are awesome ratios.

I probably thought about it way too much. I knew I wanted a new Magnum for strength and I was already planning to cut the tunnel for easy of service. I loved driving the car with the Muncie for so many years (with 4.56 gears) that I figured it would be fun to pick a transmission and rear ratio somewhat close to the original gear ratios. I know it is weird but I used to enjoy starting in second and then just shifting straight to fourth with the deep rear ratio. I built a little gear calculator and messed around with the numbers.
The wide ratio (TUET11012) first four gears lined up closest to the original Muncie wide ratio gear ratios, coupled with the new 3.90 rear gear.

Then I looked at highway speeds and figured I want to cruise the heck out of this car and the roads are long and straight out here in the west. It was easy to select the wide ratio with the .5 final ratio to keep the RPM below 2,000 at 75 MPH.
If the car runs out a steam too early on the Auto-X then I can always select a higher gear ratio like 3.70 or 3.5.

http://i.imgur.com/MlCTxERl.jpg

[SlowProgress]

Thanks for posting that up. Wish I had found that before to save a little time and a few brain cells - nice calculator!