ok after going through this long thread , i am wondering some of the outcomes
1 does howard sell the conversion in kit form?
2 to the guy with the liberty tranny upgrade how much power are you running through it and how long have you been running it ?
I am running a 20B and i make 500+ i can easily make more but i already blew one tranny (spectacularly if i might add) and i dont like doing the same thing over and over (tranny swaps)
i dont track the car or drag race it (at least not at a track)
just wondering which conversion makes more sense for me , either going for the GTO tranny or the liberty route , both time and budget wise

 

I broke 3rd gear on the liberty one recently. This was after 5 track events @ 670 rwhp. The stock one used to break in 4-5 laps at full power so it was a huge improvement. I doubt it would ever break on the street with regular tires.

thewird

 

hhhhm ...this is sounding more and more like something more fit for me , just for comparison , what amount are we talking about more or less for the upgraded liberty box?
does it grind and make whiny noises ?or just like stock ?
just trying to get a comparison here .
the T56 might be beefier and stronger , but i will most likely never use this car other than street so a solution that is simpler (less running around and scavenging parts etc) would be great

 

It drives like stock. They just upgrade the mainshaft and treat all the internals.

thewird

 

i`ll try and contact both howard and liberty to see what info can get to make a decision next time the gearbox pops i want to be ready

 

Digging this sucker up....

Anyone know what the damage from these guys http://www.drenth-gearboxes.com/prod...0-gearbox.html . They even have a bell housing for RX7 http://www.drenth-gearboxes.com/prod...ellhouses.html


Also only 85lb

 

i note a used DG500 was for sale at $15,000 plus shipping.

sign me up.

not.

howard

 

Bringing this back. I will update this thread near the summer as I'm currently fitting a CTS-V version of the t56 for my NA 20b thats moved back 5-1/2". I got a tinny bit of massaging to the tranny tunnel to do but so far it appears it's gonna fit.

 

Gents Ive had a good read and some really good info in this thread.

But some quick questions. Did anyone try the T56 Magnum with an adaptered shifter?
Project V8 RX-7: Part 8 - The Shifter
Im guessing the V8 guys would have a similar gearbox location and length.

And do any of the adapter plates work for a FC turbo gearbox?

 

for the last 4 years i have used a QuarterMaster cerametallic double disc. it has always been borderline as to offering a pleasant driving experience as in better stay away from stop and go traffic.

this year it started slipping around 550 in April. i had it rebuilt and was back on the dyno in October only to have more slippage.

My tuner shop, Beyond Redline in Green Bay, Wi happened to have just finished a beautiful 3 rotor and had collaborated w Mcloed for the clutch. the direction from the owner was he wanted his wife to be able to drive it...

i was mumbling to myself about my slipping clutch and having to miss the Texas Mile (again) when Luke suggested i hop in the 3 rotor and take it for a run around the block to evaluate the clutch.

it took me four feet to make a decision.

almost OE clutch pedal pressure, ability to feather take-up.

and it holds 800 foot pounds! (according to Mcloed)

while i am in the process of acquiring (4-6 weeks) the clutch so i haven't actually had it in my car i have experienced it in the other FD and therefore suggest it for your consideration.

the package from Mcloed consists of a custom flywheel that bolts to the rear crank counterweight, and the RST clutch package.

pressure plate is 1900 pounds spring pressure

double disc/organic sprung linings 9 11/16 diameter

my guess is they would build it w any spline option you want on the discs.

i am totally impressed w the feel of the clutch and can't wait to get it in my car.

Howard

 

It's winter time and I want a good transmission upgrade...someone tell me what to buy. I'm leaning towards Liberty but I feel like there should be some SOLID options at this point.

 

The T-56 Magnum is REALLY hard to beat. Based on the info in this thread I'd be inclined to try the TR6060 behind the rotary. Better shifter location and better syncros.

Howard, The RST is a SUPER popular twin disk in the LS world. Honda style PP with great tq capability. Drag racers go to the RXT though.

 

i really want to know more about the new tr-3160 the one in the new gt350/350r it also comes in the new camaro and ats-v but the one in the mustang was modded for the new high revving 5.2 flat plane crank "voodoo" engine car revs to 8250rpm also comes with a 5th gear 1:1 has has almost the same gearing as a getrag v160 out of a supra says the torque rating is at about 450lbs but we all have seen regular tremecs go way above that

 

In order to run the T56 Magnum, if I'm remembering correctly, I'd need the auto rear place? Among other things.

 

Sequential shifting ain't for paupers. Neither is new technology.

 

To do it right you need the Auto rear plate. To make this work with the manual rear plate you can either shave the manual rear plate or shave the T56 Magnum casting to make it work. Both are not optimal.

Going to the T56 Magnum is a good amount of money. If you try to do it on the cheap and skimp it is still going to be a pretty penny. If you are just starting to do the research on this it is more then you think. I had the funds saved up but for me it made since to do it right and wait till a rebuild is needed and use the auto rear plate. Since I cannot kill this motor, and I have tried, I have a low mileage JDM series 8 trans at liberty now getting everything possible done. Super cheap in comparison and will be under 2K for the whole thing. 3rd gear is a weak point and there is nothing that can be done about it other then lifting while shifting into 3rd. I am hoping a Tilton flow control valve will help but I will see. If you are under 500WTQ I am pretty sure you would have no problems at all with the fortified Liberty gears trans.

 

After helping my dad put a t56 in his 67 camaro i learned a few things. First is that you dont have to shave 1/2 off the bellhousing like howard did. You can buy t56 input shafts in several lengths and they are easy to swap out. Thats what we did with my dads. It has an adapter plate to use his SBC scatter shield. Also you dont have to use an auto rear plate, bell housing, or have an expensive clutch setup made for it. Simply use a turboII bell housing and pressure plate.

 

you ever look into the cd009 transmission from a nissan 350/370z? supposed to be able to hold over 1000whp, and can be had much cheaper than a t56 brand new. i believe Theorie is working with somebody on releasing a kit very soon.

 

Gear ratios are pretty well suited to the rotary too.

 

yea i seen this like it would be really good just dont know how it will fit in the tunnel

 

I would be very curious to see this confirmed.

 

how does this work to mate the T56 up to the back of a rotary? the turboII bell housing is similar to the 5-spd FD bellhousing, it is also the front of the trans case. so you have a taller, more narrow bolt pattern that bolts from the inside the housing and has only holes for the input shaft...

the T56 bell housing bolts from the outside w/ threads in the bellhousing to hold it to the transmission and the patter itself is more circular...

am i missing something?

 

You have to have an adapter plate regardless. But with the turbo II bell housing its a push style clutch with the slave cylinder on top of the bell housing eliminating the need for a custom clutch/buttoned flexplate setup.

 

Gotcha... thanks for the clarification

 

You sure your not specifying fiitment of the 5speed version? Because if this is a t56 6speed, there's no way around not cutting into the tranny body to fit the rear facing starter with the manuel tranny belhousing.