Im looking for more info about removing part of the syncros and things like that. And maybe other mods to make my TII tranny more track ready...

Not sure if this knowledge is a secret shared beyween the pros, but i cant find info on it anywhere... yuo can PM me info if you like.

 

i did a lot of searching and i cant find much at all.

I was told a few guys remove the syncros and most of the dog clutchs on TII or similar style trannys for fast clutchless shifting. is this true?

anyone can explain further?

 

theres only "one" guy i know that has done it with success but good luck gettin that info ?????

 

yeah, it seems to be a secret...

but i found this. but it dosnt mention anything about syncro or dog clutch mods. but seems to be what im looking for?

https://www.rx7club.com/rotary-drag-racing-167/crash-box-transmission-cheap-legal-solution-rx7-drag-racers-542579/

 

Unless you HAVE TO run the factory box you will be better in the long run to go wit an aftermarket box.

 

of course its better to spend 5-8k on a full race tranny. but grinding and removing a few things just costs time. Im not looking to add the pro shifter to the TII trans at the moment. just shift faster without using the clutch pedal. i was also going to have the gears cryoed for a little added longevity.

im not competing or trying to break records. just trying to get faster and beat my own times while not having to much down time saving for exspensive parts... and learning as much as possible in the process.

 

Best option for the stock trans is to faceplate it. Send it into Liberty and have them do it professionally. You still have to use the clutch but you only have to tap it. Here's the link.

http://www.libertysgears.com/faceplate-proshift.htm

 

I think last time I called liberty to modify the T2 trans to run straight cut was around 5k or so.

 

I was goin through the same thing last year, I didn't have a problem w/ the gears it's the main shaft that breaks . as for shifting fast (clutchless) i never went in the tranny to modify due to the main shaft problem gl and keep us updated i'm sure alot of the members would love to have both worlds w/ the factory tranny

and the difference between us is I was trying to break RECORDS

 

tearbo2 there is a rx3 in Australia running a modified t2 gear box... H-pattern, dog engagement.

I think he said it costs around the 6k mark. His cars running mid or low 8's with it BUT he has changed to a clutchless 4 speed gforce

He has some videos of his car running on youtube... Some of these videos are with the clutchless 4 speed..
http://www.youtube.com/watch?v=g8HPQ...e=channel_page
http://www.youtube.com/watch?v=NYfvY...e=channel_page
http://www.youtube.com/watch?v=hVmsj...e=channel_page
http://www.youtube.com/watch?v=53tz2...e=channel_page
http://www.youtube.com/watch?v=moIPH...e=channel_page
http://www.youtube.com/watch?v=ffb3j...e=channel_page
http://www.youtube.com/watch?v=onU52...e=channel_page

these are the people who made it http://www.albinsgear.com.au/

 

this seems like a pretty good way to go. but im sure the cost isnt to light. do you have to send them the tranny, or just the gears?

im still wondering about the home mods that can be done with grinding the dogs and removing some syncors. where the cost is just time and work. to bad no one will ever do a write up on this for the TII trans.

 

one thing that holds people back is the trannys. 8k for a race tranny is out of reach for most people without a shop or sponsers. I know its been done for a very long time, it just seems to be a little secret pros keep under wraps like certain porting and rotor mod tricks.

someone will leak it sooner or later... im just looking to get it sooner.

 

Building a home brew slick shift is easy.

Step one- grind every other syncro dog off the gear.
Step two- machine every other lug off the shift collar.
Step three- throw the syncros away and reassemble.

The transmission can be shifted much faster but you are removing a lot of material so i don't know how strong it would be. If you have the time and an extra trans just give it a try.

 

Why would you spend 6k on a turbo II trans when you can buy Gforce for the same if not cheaper?

Did you check the prices on the Website? If my math is correct, it looks like face plating would cost around 1000 bucks.

 

first thing you need to do is remove the rubber insert that connects the top part of the shifter with the bottom part...then you have less flex when shifting..

Run 1/2 90 weight gear fluid and the rest 10-40 motor oil.

Second make sure your Presure plate is in good shape.. and engages and disengages without binding.

then the last thing and most important thing is a perfectly balanced drive-shaft...any unbalance in a driveshaft with rattle the tranny shaft and gears will be harder to go in.

As far as syncros you dont have to touch them....

I have seen "EL PA" datsun run 9.0 and west racing 8.90s with a TII tranny shifting at 9500..
and they had 28x10 tires and got plenty of use.

 

thanks guys! plenty of good info here...

i'll be doint this. well see how it goes.

 

What are you going to do? Do it yourself or send it out?

 

myself... I have a few spare trannys if anything goes wrong. sounds decently easy though.

 

bump...

2 questions.

1.. CAn this be done to a FD tranny as well?

2. If not can a TII tranny be used in a fd?

 

[QUOTE=sen2two;9491865]i did a lot of searching and i cant find much at all.

I was told a few guys remove the syncros and most of the dog clutchs on TII or similar style trannys for fast clutchless shifting. is this true?

anyone can explain further?[/QUOT

 

sorry...the new record is now 8.09 @ 168MPH with a TII tranny.


http://www.grs-motorsports.com/fotos.../27mar/111.jpg

 

i would love to find out more info as well, see a lot of people talking about the doug nash 4+1 and stuff like that but not a lot of info on what is required to run such a box and how they hold up? i would love to run a stock t2 tranny or modified, in my 88fc as well just scared it will break.

 

sen2two how is this coming along?