Lets talk about auto's

[GroverDill]

I want to put a auto in my turbo car this winter.

It makes about 1100 flywheel hp, I want a overdrive trans and the car has 3.27's in it.

I have read good things about Freddy Brown set ups.

 

[MY 85 GT]

How about Lentech?..hear good things about them. I think thats the trans im going with..

 

[GroverDill]

I know this is not going to be cheap, I want to do this once and the right way. I am guessing 7k to get it done. I will sell the viper spec set up after to help recoup some of the costs.

I want to use a stock shifter unless I can be shown why it is a bad idea

 

[84Ttop]

Randy Seward runs the Freddy brown piece. He recently drove 800 miles to Bradenton won true street with a 8.67 average after 30 miles and 3 passes and drove home!! If I was in the market for a new trans, that would be a serious consideration.

 

[84Ttop]

On a second note, Freddy Brown modified the stock shifter to have positive stops between gears and from what I hear it worked like a champ!

 

[TOOLOW91]

x3 on the Freddy brown route , there is a member on here and I can't think of his name , he has a 84 ttop coupe twin turbo with a stock shifter and the Freddy brown setup

 

[GroverDill]

The Freddy Brown set up gets much love from many. I am leaning that way.

I think the turbo will love the auto.

 

[S&B]

the problem is most of us only claim to have 1000 hp you actually do so im sure our input will be very usefull.

 

[GroverDill]

I am investigating other places too but I know there are some smart folks on here but I hear what you're sayin.

 

[RacEoHolic330]

Subscribing. Not interested in going auto right now...but I'm sure I will be when I actually drive my car for a while.

I'm sure a manually-shifted auto could still be a blast to drive with a turbo car. I don't know about autos though.

 

[GroverDill]

The auto will keep the load on the turbo and doing so wont load and unload the rear end just making more traction problems.

I am moving to Spokane soon and there is a local strip there!

 

[TOOLOW91]

I do not by any means have a high hp car but I have worked on a friends 331 car with a 76 and c4 with a rev manual valve body and trans brake .

his only
regret was not having a aod to have the overdrive .

other wise the car ran awesome trapped 130s with it at the track and went best of 11.2 on 18 inch saleens car Definitely had 10s in it easy and the best was it only made 545 through the stick setup and with the auto made a conservative 475 .... so just think what your car is gonna be like ! GroverDill

 

[88LX5.Oh]

No losing boost between shifts

 

[MY 85 GT]

I know im no were in the league of your car.So all i can say is WOW that kind of HP and just keep building boost and power....HOLD ON...lol....But with an AUTO it is so nice..just builds boost and stays there...I like the OD its nice to have for just normal driving..if that makes sense..I do daily mine alot...I was thinking of going with a C4 ..but hear that can build an AOD pretty strong today..

 

[srtthis]

might want to hit up the bullet on this one!

my suggestion would be a 4L80 maybe a new 5R55 if it can be done

 

[90lxcoupe]

4L80 is a gm trans. Would probably be easier to swap a 4r60 in, and either use a bauman controller, or just get a manual valve body.

Those transmissions are pretty strong from the factory. If i were doing it, i would probably just go with a manual valvebody and a transbrake, and run it till it breaks. they are too expensive to build for me.

 

[Bullitt347]

I am going to pushing north of 1200 HP and am using a 4R70W. Mine was built without the O/D because it is a drag race application, but the O/D can be retained if you want just for no boost cruising at highway speeds. I had my trans built by Dan Gilsdorf at Silverfox Performance Transmission. He also built my friend Walters AOD that withstood 3 years of 9 sec 1/4 mile drag racing with no issues. Total cost to build my 4R70W was around $5500.00 including the custom converter, SFI safety bellhousing, transbrake, deep pan ect. The benefit of the 4R70W over the AOD was that you can get converter lock-up in high gear.

 

[90lxcoupe]

The benefit of the 4R70W over the AOD was that you can get converter lock-up in high gear.

That would be fun with a turbo car on the highway.

 

[Bullitt347]

That would be fun with a turbo car on the highway.

To be clear....high gear is 3rd...not O/D... but yes, at WOT in 3rd you get the benefit of the converter locking up. You could lock the converter in 1st or 2nd gear, but the converter would eat itself, so you are limited 3rd gear lock up.

 

[GroverDill]

I have read good and bad about lock up vs non lock up. To be 100% honest I don't know what would serve me better. My car is a 99% street car that will see some highway use ( not a lot )

FB and SilverFox are the 2 I am looking at. I don't think I want a computer controlled trans and I would like a trans I could just put in D for normal driving.

FWIW it made 954 with the viper t56 last tune session, I have since dialed out about 1- 1.5 psi, currently making about 920 at 23psi