Very cool idea, we have been thinking about this for a while now..
Please keep me posted on the project..
Eric

 

The funny thing about this GM stuff is the cost. I have purchases lightly used bellhousing/Clutch/Starter/Flywheel for $300 shipped. The transmission is $3200 rebuilt from Gforce. So I'll be into this under 4K for a complete drivetrain all said and done. It will hold 800-1000 hp too

 

Nother level. That would be just too awesome. Any downsides to a setup like this?

 

Street driveability and noise from the box, along with only have four gears. Those are the main downsides. I'm buying a rebuilt unit from Gforce south. These are the same units used in Nascar. They will hold 800+hp for long periods of time. Tons of gear ratios also available. You can run a 0.749 4th if you want to. I'm going to run a 29 spline 1.25" input shaft with a 32 spline output shaft. Likely I'm going to run a 2 plate cermatallic frictions in the clutch to make it more streetable. Straight sintered metallic would be hell trying to drive around on.

http://www.gforcesouth.com/gf4a.html

Justin

 

Sounds great, I'm interested to see the final result. And some in car footage!

 

I see. What's the drivetrane loss on something like this?

 

Not sure on the drivetrain loss. My transmission is in the mail to me

I should be able to design the crank adapter quickly after I receive the transmission.

 

Here is my Clutch, Bell housing and Starter.. I need to source a release bearing for the clutch, and a pilot bearing for the crank adapter.

 

Comparing my Chevy R07 Flywheel (8 bolt pattern) to the standard 2JZ crank pattern, it would apprear they are very close in dimensions. I will likely do a little bit of machining on the flywheel and use a simple spacer between the crank and flywheel. Here is a picture of my Boostwerks TH400 crank adapter overlaying my Tilton flywheel.

Separate:

Flywheel Over Adapter:

Adapter Over Flywheel:

I did model the crank adapter for the GM 6 bolt patter. This is NOT going to work without making the adapter plate two pieces. Too complicated for my liking. If you want to do a GM style trans, it looks like this method is the best bet anyway. I can bolt up any GM pattern transmission to my bellhousing. I can use Any Tilton or Quartermaster 7.25" clutch with this flywheel. It just seems to me that you open up a big can of worms trying to get non reverse mount starter applications supported. You could use the factory flex plate with the Toyota starter if you wanted to. This is the method most of the TH400 guys use.

Justin

 

Tilton R07 Flywheel model with 2JZ bolt pattern sketched over the top:

 

The idea is to ovalize the mounting holes on the flywheel and use a 0.025" wall thickness bushing around the 10mm 2JZ crank bolts. This will allow everything to bolt together with a simple spacer.

 

sweet. im lucky i live in charlotte nc. lots of race teams here so an r07 flywheel shouldnt be hard to come by.

 

Most of the driveline parts have arrived and are sitting in the garage waiting for me to design the crank spacer and pilot bushing holder.

You can follow my blog on my project here as I'm likely going to be updating it more frequently then this thread.

http://widenlow.blogspot.com/

 

Could you get me some measurements of width and height of the transmission? I'm looking at doing something similar in a different chassis, and want to make sure there is room.
:drool:

 

badass!

 

that's hot man keep up posted

 

so you can only bolt up the gforce 4 speed transmission.

i wonder if they can make one of their 5 or 6 speed units with a gm-style mounting.

if you dont mind asking how much do you have invested so far in this project(new or used)

i have full access to a cnc facility and i can do all my own solid modeling as well. that should keep any labor prices down.

 

the more people involved, maybe you guys can get something to market quicker / cheaper.

 

Here is the list of transmission that will bolt upto the Tilton bellhousing that I have:

"Saginaw, Muncie, Richmond, Bert, BW-T10, Jericho, Brinn, Chevy TKO 500/600"

So it looks like you can run a G Force GF-5R for a strong 5 speed(both clutch assisted and clutchless). I don't know why anyone would want to go to this trouble to run a TKO500/600 honestly.

Here's a GF-5R install for those that are curious. You wouldn't want to run a Tilton triple plate sintered clutch for drag applications!

http://www.musclemustangfastfords.c...tech/mmfp_0711_1996_ford_mustang_performance_transmission_install/photo_06.html

Justin

 

I took the side cover off of my GF4A. The gears looks new as well as the dogs! I'm really pleased with this transmission considering I purchased it used without seeing the inside.

I want to add a full handcuff at some point along with a different shifter.

Justin

 

i like this thread.

 

Pictures for the day. Ross Adapter plate vs Tilton Bellhousing. Two pictures of the internals of my GF4A transmission.

 

great! I'm excited about this, very cool stuff~!!

 

Wow, this is very cool. Is this going into a different 2JZ swapped car?

 

This is going into a Datsun 280z.

The distance from the lowest part of the transmission to the input shaft center line is ~6". The transmission body actually hangs lower then the bellhousing I currently have.

I'm going to need to drysump the 2JZ to really take advantage of this.

 

call me @ 954/448/8739 I have some drysump parts like oil pump, bullish drysump oil pan,and reservoir tank.

 

i like this idea but i have to ask is the supra Getrag transmission not strong enough or whats the reason your not going to use a bolt in option?

-Sam

 

Cost is one of the driving factors behind not using a Getrag 6 speed. I have roughly $2250 into this setup with the adapter plate, clutch, transmission, bellhousing, and starter. If i break something in the transmission, clutch, ect. Its no big deal to find spares at a reasonable cost. Rebuilding these is fairly straight forward as well, so I can do my own maintenance!

This setup is tough as nails. It can handle a 5 hour race on a road course behind a 800-900 hp engine. I don't know if the same can be said for the getrag.

I have a huge selection (300+ ratios) of gear ratios with this transmission. I can run upto a 0.749 overdrive if wanted.

Dog Engagement is a huge plus to me. Getting rid of the synchromesh transmission will make high rpm shifts much more repeatable. Also, no lift shifting just seems like it will be bad ass!

Wieight is also a big factor for me. This transmission complete with bellhousing is ~ 90lbs.