fi addict

nothing like a lil comp.

looking to fb transmissions or fb performance for these convertors also

i was going to and still might have a 350 chevy turbo tranny conversion done. (good for an est. 900hp)

a t5 convertion should be easy......worth a call
they sponsored someone on the import racing curcuit and have a nice setup over on Long Island, NY


also the MX-5 tranny IS weak
both 5 and 6 speed ones ...6 worse then 5spd 5 speeds get torn up at about 275-300ft/lbs.

badfish229

That's what I'm saying! Will a T56 fit under the RX-8's body?

t-von

iTrader: (8)

So is anyone running a T-56 tranny on an Rx7 yet?

kabooski

back
good info
don't know how I misssed this thread

I want a more precise tranny
sure Ari Yallon is running low 9's with a S6 tranny
but I'm sure it has been race prepped $$$
REM polished/Cryo treated/shot peened etc

I've already looked into PG's
and the TH350

In australia they are using stock
S2 <- (3 speed) S4/S5 <--(4 speed) RX-7 auto trannys (Jatco)
heavily modifed with Trans Brake and FuLL manuel valve bodies
can handle 800 HP

Price comes out to that of a full blown out Gforce or Jerico
with the Power Glide and TH350 or even the Mazda Jatco auto
$4000+++


The Best and I mean the Best
tranny option I have found so far
is the New Tremec TKO 600

can Handle 600! pounds of torgue

They have a T5 bolt pattern
so the Kennedy Adapter should work



Features & Benefits:

Higher center distance (83 mm) from main shaft to counter shaft allows for larger gear sizes and higher torque carrying capacity

Close gear ratio (2.87 & 3.27) models available for high-performance racing applications

Robust transmission design with internal 3-rail shift system with cast iron shift forks

Tapered roller bearings on input, output and counter shafts improve performance (reduced noise factor).

All gears and shafts made from special grade steel (ASTM 4615) that permits increased torque carrying capacity

Single-piece countershaft that better handles increased torque carrying capacity

Equipped with a high-performance short-throw billet aluminum shifter that isolates road noise, while providing clean crisp shifts

Neutral safety switch and back-up light sensor

Flexible and versatile:

Eight shifter locations available

Dual electronic and mechanical speedometer pick-ups

Three unique cross member-mounting configurations

Three different input shafts available

Three available overdrive ratios

.64 or .68 ratios reduce engine rpm to a level that makes it fun to drive besides enhancing the fuel efficiency

.82 ratio is ideal for long straight-aways for high performance racing


Gear Ratio Chart

1st - 2.87
2nd- 1.89
3RD- 1.28
4rth- 1.00
5th- .64 OR .82

Looking at the Guru Transmission chart
The Tremec is close in ratio to that of the Guru box

I've seen the Tremc TKO 600 as cheap as $1,520
add $300 for the adapter
$95 for the driveshaft Yoke
$100 to $250 for either a re-hacked stock driveshaft or a custom one
(advance driveline in Orlando can do the job)

you can also make a custom braket for the shifter to
get it to sit in the stock shifter location


another cheaper route
at least for us 2nd gen folks
that wants a more precise shifting tranny
is the FD tranny
My friend who owns thepartstrader.com
put in a 3rd gen tranny in his TII
He changed the output shaft to a TII one
and changed the Tail section to a TII unit

He claimes the FD tranny is much more precise to shift
then the TII one
He does not miss gears anymore

We'll see soon
if everything goes to plan
I'll be buying the Tremec 600
by the end of May

Marcel Burkett

I've been looking for some info on an alternative gear box , can you direct me to the Kennedy Adapter ?? What about the one from Roger Mandeville anyone know ??

LUPE

JW makes a bellhousing to adapt a 13B to a Jericho or Chevy (PN:97007 & 97008) transmission. This would cover anything from a TH400/350/210 to a Powerglide. They also make a 13B bellhousing (PN:97004). These bellhousings are SFI approved.

$200

You'll have to download their PDF catalog (it's on page 17)
http://www.racewithjw.com/JW_catalog.pdf

APEXL8T

MAZDA ROTARY TO BORG WARNER T-5



KEP # 9000 Adapter kit fits most manual shift '74+ Mazda Rotary bellhousings to the Borg-Warner T-5 transmission (from the Ford Mustang GT '85+). The Mazda flywheel, clutch, starter and throwout bearing are retained. A Ford disc must be used. The T-5 transmission that is normally slanted 18º must now be mounted vertical.
Kit includes adapter plate, bolts, pilot bearing and instructions.

Marcel Burkett

Whats the cheapest price (and where ) , to find one of these transmissons?.

kabooski

most prices are in the $1,600 range
ebay sometimes has lower prices

Auto Illusions

I did not read this whole thread however it does seem that it has been dug out of storage as the first post date is a long time ago.

I have a brand new liberty TKO 600 with face tooth cut synchroless 2nd, 3rd, 4th gear. I also had a custom input shaft made to maintain the shifter location of the FD, stock pilot bearing size and had it cut with chevy clutch splines. Mutch larger and stronger than the stock mazda clutch splines (i am using a carbon carbon twin disc custom made.)

I am currently waiting on a local machine shop to make the transmission adapter to go from the 5-speed to a cosmo stock bell housing using cosmo front mounted starter!

I am using a tilton 3-post hydraulic TOB so there is no fork to deal with!

I have been working on this setup for over 8 months as that is how long it took Liberty to build my transmission that i just received a couple of weeks ago. As soon as i get my trans adapter in a couple weeks, i will mount it up in the car and post some pics!

Auto Illusions

My 2cents...

The shifter is in the wrong location all together. You have to fabricate something for the shift linkage to move it back or get a custom input shaft made! I had to space the face of the transmision back over 12" from the motor plate to get it in the stock location.

You have to remove the power plant frame and fab up a trans mount as well as new differential mount! (as you already know)

You would have to modify the pilot shaft bearing or turn down the trans input shaft to fit the stock pilot bearing! ( Another good reason to use a custom input shaft)

You have to use a custom clutch setup to accept the diferent splines. chevy and ford clutches are a larger diameter and would not work on FD flywheel or pressure plate.(again another reason to have a custom input shaft made)

You have to watch using a syncronized transmission that was not designed to shift at 7000+ RPM as it will not go into gear very well! That is why the Liberty face tooth cut syncroless transmission is a good choice. The Mazda transmission is designed to be shifted at higher rpm's and can function properly with the syncronizers doing their job!

Of corse the drive shaft would have to be made (again already stated)

My transmission will be in the car in a couple of weeks. If i can regain access to posting pics, i will post them.

SPiN Racing

Hmm that may not be exactly true... Best friend had a Camaro from SLP that had a variety of additions from him and SLP.. and it had the T-56 in it and was shifted with brutality/authority at 7K with regularity. (Nearly Every shift) He also would spray out of the hole a 100 shot and the car was doing 11.8 1/4 times with no internal mods.
http://www.ghostrider.cz28.com/ (look for the camaro with the flames)

I myself shifted the car on many a flogging run at 7K more times than I can count, and he has had it to the rev limiter in 6th on more than one occation. (with I believe a 4.10 rearend)

Myself? I would put a T-56 behind any sub 8K rpm rotary without thought to rpm limits.
Also.. as long as you are not doing drag launches I wouldnt hesitate to put it in front of 95 percent of the 20Bs out there.
There are soo many parts that will fail before the tranny.... that combined with the traction limitations.. I think it would be fine in most cases.

Yes there are limits to all rules.. and yes there are nuckleheads that can break anything.. and are uncoordinated or ham-fisted enough to be unable to shift properly.. or quickly/smoothly.. and can break and or abuse anything.. we alll know someone who gets a cherry car.. and it is a POS a few months later.

As I said.. I'd not hesitate to put one behind a rotary.

rx7tt95

CLR Motorsports makes an adapter to use the Supra 6-speed. Might be for FD only. T-56 trannies really do not like nor are they designed for lots of high speed shifting. With a built rotary, it's not 7K rpm but upwards of 9 or even 10K rpm. Heck the stock car's redline is 8K! Anyone needing an aftermarket transmission has, I'm sure, removed the bottlenecks that cause power to fall off in the mid-7K range. I know my car kept pulling well past 8 on the dyno.

Auto Illusions

7000 was a misprint on my end. It is not abnormal to have a v-8 shifting at 7000. Rotary engine can run much higher rpm levels.

The syncro not working at higher rpm was not mentioned from past experience but is what i was told by liberty transmissions. I just believed them and can not backup the statement!

SPiN Racing

Hmm I know what you mean.. but as I said above.. Sub 8K stuff I am certain it would be fine..

This being most of the 20Bs out there with stock porting and the usual aftermarket add ons from there. They will not be going past 8k very often if at all. Or shouldnt be, as the performance should be dropping off at that point.
Yes you can force more performance with larger turbos etc.. but the efficiency of it all falls off a lot from there. Unless porting adjustments are made to compensate at the higher RPM.

Above 8K No T-56 will NOT like shifting. But up to 7K I have personally done a million times and it was fine smooth and fast.
/shrug

kabooski

Hope the owner doesn't mind
but here is a second gen with a T-5 (alsmost same as the tremec<-- except stronger)


extended the shifter and its looks stock

jimlab

Where did you hear this?


You're kidding, right?

kabooski

where is the pointer pointed to Jim?

at the tremec

600 pounds of Torque
for the Tremec TKo 600

WHICH IS PLENTY for a 12A/13B rotary
and there are 3600 pound Mustangs running 9's with this tranny

kabooski

Here is a WC T5
hmm looks to be "pretty close" in dimensions to me.. Jim

13btnos

iTrader: (1)

You might want to look at this http://www.g-forcetransmissions.com/tran_gt-5.asp G-Force makes an upgrade for the T5 transmissions they can setup any gears you want. Turns the the T5 into a dog ringed geared transmission. All in all it comes out to around $2100 for the whole setup they claim it can handle upwards of 600hp and 500ft-lbs of torque in a 3300lbs car. Well that's the setup I'm looking to run when I get my car all setup. Oh yeah Kabooski have you seen Freddy Turbo's datsun run lately? He says he is having all sorts of problems shaking the tires out the hole anyways I'm gonna be in Orlando May 19-21 Freddy has my motor he is porting and pinning it for me. Man I'd like to see your car.

rx7tt95

I "believe" Jim was pointing to the fact that the Tremec boxes are stronger than the standard T5 boxes that come in the Fox bodies. Tremec has always been considered an upgrade over a stock T5 and the T5 World Class box. Naturally one can't determine a transmission's strength by looking at it :-) But to counter, I think Kabooski was saying the same thing!

jimlab

Sorry, I wasn't able to correctly decipher your version of English sentence composition...

APEXL8T

g force dog ring..........mmmmm

SPOautos

Theres FD's running 9's with the stock FD tranny. Doesnt mean they arent breaking them behind the scenes.

Also you guys need to consider launching rpm. Most of the V8's arent coming out of the hole at 8000rpms. That places a LOT of strain on the tranny and diff. I would be more worried about that. Our stock tranny will hold over 600rwhp.....as long as you arent launching it at high rpms.

Stephen

Marcel Burkett

So what happens to the PPF when using one of these trannies ? , is it totally eliminated ??