rfreeman27

iTrader: (5)

I Posted this in the race car tech section but I was not getting any responces.

I need to make a decision on what trans I will be running the trans in my (hopefully) 9 second twinturbo FD. All along I was going to run a jerico 4 speed. I have the adapter kit already and a few clutches, etc. The kit I have is fairly complete sans a trans mount. (tubular PPF, steel driveshaft etc)

I can get a jerico for 2500 bucks rebuilt to factory spec with any gearset I would like. This trans is basically bulletproof and could take anything I could throw at it.

You do have to cut a hole in your trans tunnel for the shifter to fit. I will do that if needed.

now, the kit is going to be about 800-900 bucks all said and done. Throw the 2500 bucks for the trans into that i'm still doing fairly well. It's just going to be a hasle. I have to locate a FC bellhousing (push clutch only) blah blah

Now, I was searching for other options to make sure the jerico is the best trans setup for me.

I initally looked past the guru because it uses stock input shaft, which is a definate weakness, especally in a drag car. The guru would be the easiest solution (stock fd case) but i'm worried it will not take the power. Driveability is not much of a concern, im sure its similar to a jerico.

I want some input from people that own or have driven the box! What do yall think? I really dont want to deal with broken drivetrain parts. But if I can make mylife easier with the guru it would be nice...

-bobby

rex u.k

Guru kit is very tight, will take alot of abuse but don't know how far the stock input shaft can go.

Maxthe7man

If you are happy with the ratios of the stock box and its just shifting/synchro problems you are anticpating, maybe just get your stock box "pro-shifted" by Liberty...
There are alot of options, the only thing about a 4sp, is if you ever plan to run this thing on the street at all, it could suck on the top end..
I chose the hks 6sp since it keeps the top gear sane..Wish I could give you a review at this point, but its not done yet...soon..
What kinda clutch are you thinkin about running?
Max

LETHAL RX7

iTrader: (1)

if i were you i would buy a gforce. thats what im getting ready to go in my car. the jerico is a nice tranny but if you call jerico then call gforce you will see how much better it is to deal with the guys at gforce. Anyone you talk to is in the shop and builds them. Look into the 101 gforce it should work with stuff you may have bought already. Mike the owner of gforce is an rx7 guy too so that just tops it all off.
Greg

12at

I had the privelage of using a guru box when I last raced my rx7. I must say i was very impressed with it. The ratios were great as it didn't drop much rpm between gears which suited my narrow powerband. I only did 6 passes but I dropped the clutch at 11k everytime and the box was fine. I ended up running 10.26 @136 mph. I was so nervous I forgot to change clutchless so I think there is a little left in it. I also know of an rx3 here in aus that went from a 9.63 down to a 9.30 @ 150 mph and the only change was going to the guru box.
I think the best thing about it is that the gearbox is still streetable.

rfreeman27

iTrader: (5)

I view the 4 speed as a good thing, Because it will keep me from doing more then 150mph

I've looked at gforce and i agree with you that they are awesome transmissions. I just cant get one for the same price as i can get a jerico. Plus the jerico will be rebuilt to new with the ratios i want.

12at, How much torque/hp does your car make?

Max, how much did you drop on the HKS? What kind of modifications are needed to install it? I thought it was a sequential?

Maxthe7man

I got it used for about half price(5000.00 can), Its a straight bolt in affair for the stock transmission, it still uses the stock bellhousing however, it has all the factory connections on it as well for the detents and speedo.. My main reason for the 6psd box was to get better ratios as well, 1st in the stock box is to low, you have to shift like 20 feet out of the hole, the hks box plants the engine back into the rpm band, well above the boost threshold every shift.. I just havent decided on a clutch/flywheel combination yet for this setup..Max

LETHAL RX7

iTrader: (1)

i recommend that you call gforce first..Sometimes they have "used" boxes around but they really arent used bc they are all checked out and they will put in whatever ratios that you want. Beleive me gforce is the guys to deal with....
Greg

12at

My car made 480rwhp. I have no idea on the torque but the car weighs 2778 pounds and it ran 136 mph so I guess it has a decent amount of torque.

rfreeman27

iTrader: (5)

I'll give them a call...

I still havent decided (gforce excluded) on what to do. I'm thinking about just going through with the hastle of the jerico because i KNOW that it wolnt break.

GoodfellaFD3S

iTrader: (213)

The guru is not too too bad to drive. It takes some getting used to, but I was able to work with it my first time around with no huge problems. It can be driven on the street if you don't mind the noise and clunking. The shifts are lightning quick, that's for sure.

rfreeman27

iTrader: (5)

I dont think noise is a big issue...at all..

I might just go guru now. I can always sell it if it isnt strong enough for my needs and go to a full jerico. I already have the (incomplete) swap kit so i could always change over...

The other problem i can forsee, this act 6 puck clutch i have might just wipe...So on top of the jerico i need to buy a pricey twin/tripple plate

ZoomZoom

iTrader: (2)

Guru isnt strong enough. Jerico is best bet for 9 second FD. Otherwise a Chevy Automatic. DeE used a Turbo 400 in his 8 second FD. With no transmission failures I know of

rfreeman27

iTrader: (5)

Yeah i'm fimiliar with dee's car

Do you have personal experience with either?

ZoomZoom

iTrader: (2)

Dee works on my car . but i have stock trans, he says the shaft wont hold the power needed for a 9 second car. He has used many applications and even is trying something new at the moment. He might even have a Jerico for sale. PM me and I can give you his #

rfreeman27

iTrader: (5)

Yeah i crew for dee...

and if your car is the one at his shop now, i am doing work to it as well

I know what dee thinks...And i would be buying the adapter kit from him. he sold the trans a few months back...

12at

There are cars in Oz that have run 9's with the standard T2 tranny.

88fc3sw/HX83

So what's the weak link?

1234rotor

iTrader: (1)

What about a Tremec "World Class TKO" 5 spd?? Those are very streetable and can handle more power and torque than a 13B, and does it in 3000-3400 pound camaros and mustangs.

Liberty, G-Force, Doug Nash, and Jerico are all reputable trannys too. Does the Guru tranny have a cryoed imput shaft... that may help reliability a little bit more?

I used to drag race hot rods, and that is how I know about those different trannies. Are you going to run a slipper clutch?? That way you can drop hard and it will slip until you get into the power band, they just take some adjusting to get it right where you want it though.

ErnieT

iTrader: (2)

I owe ya a 3 bar map sensor. I'll order one Monday. Thanks sweetpea.....

Turblown

iTrader: (12)

Those guys probably have BRAND NEW t2 trannies...

rfreeman27

iTrader: (5)

lol, thats funny cuz the one on my car was nabbed off a car that was in dees shop

ZoomZoom

iTrader: (2)

That better not be my car!

rfreeman27

iTrader: (5)

nah it was the red car he had in there before you, allrotor93 or something like that...

rfreeman27

iTrader: (5)

Ok, so here is my train of thought.

Go guru. I can get a killer deal on a guru right now. If it breaks then i will move on. The reason I will go guru first is because i dont really want to cut my trans tunnel up. This is Irreversible, unlike the guru box.

I can also take it easier on the car...