Transbrake and two step
Transbrake and two step hey guys, I just finished my swap from a M6 to the TH400. I had the two step wired into my clutch switch and it deactivated when i released the clutch. How could I get it to work with the transbrake? Any suggestions? What kind of button is everyone using for the transbrake?
Originally Posted by Blown408
hey guys, I just finished my swap from a M6 to the TH400. I had the two step wired into my clutch switch and it deactivated when i released the clutch. How could I get it to work with the transbrake? Any suggestions? What kind of button is everyone using for the transbrake?
I use one of those big red trans brake buttons. 
12 volts to the transbrake button. Then Y off to the trans brake and 2 step with a relay activating the 2 step. I believe its the white and grey wires that negativly activate the 2 step. Just run those thru a relay that is activated by the transbrake button. Thats the way I remember it. It's been awhile. I now have an aftermarket EFI with the 2 step built in.
I bracket race with an NA motor and I use my 2 step for consistancy. I can set the launch rpm and when the lights start to come down I mash the pedal to the floor. I don't need to watch the tach to keep a constant rpm. Besides that its a blast
12 volts to the transbrake button. Then Y off to the trans brake and 2 step with a relay activating the 2 step. I believe its the white and grey wires that negativly activate the 2 step. Just run those thru a relay that is activated by the transbrake button. Thats the way I remember it. It's been awhile. I now have an aftermarket EFI with the 2 step built in.I bracket race with an NA motor and I use my 2 step for consistancy. I can set the launch rpm and when the lights start to come down I mash the pedal to the floor. I don't need to watch the tach to keep a constant rpm. Besides that its a blast
i run a digital-6, i just run 12v to the switch and then spliced from the switch to the digital-6 2 step and the trans brake. i also have the nitrous system wired into the system so when on the trans brake and 2 step, the nitrous systems shuts down so i know for a fact that the nitrous system won't come on at the line on the brake or 2 step. just a little insurence and is vary easy to wire. let me know if you want the diagram. set-up like this is vary good for breaking parts because it hits HARD! 
Originally Posted by Tom the roofer
I use one of those big red trans brake buttons. 12 volts to the transbrake button. Then Y off to the trans brake and 2 step with a relay activating the 2 step. I believe its the white and grey wires that negativly activate the 2 step. Just run those thru a relay that is activated by the transbrake button. Thats the way I remember it. It's been awhile. I now have an aftermarket EFI with the 2 step built in.
I bracket race with an NA motor and I use my 2 step for consistancy. I can set the launch rpm and when the lights start to come down I mash the pedal to the floor. I don't need to watch the tach to keep a constant rpm. Besides that its a blast
12 volts to the transbrake button. Then Y off to the trans brake and 2 step with a relay activating the 2 step. I believe its the white and grey wires that negativly activate the 2 step. Just run those thru a relay that is activated by the transbrake button. Thats the way I remember it. It's been awhile. I now have an aftermarket EFI with the 2 step built in.I bracket race with an NA motor and I use my 2 step for consistancy. I can set the launch rpm and when the lights start to come down I mash the pedal to the floor. I don't need to watch the tach to keep a constant rpm. Besides that its a blast
Originally Posted by lafnlt1
i run a digital-6, i just run 12v to the switch and then spliced from the switch to the digital-6 2 step and the trans brake. i also have the nitrous system wired into the system so when on the trans brake and 2 step, the nitrous systems shuts down so i know for a fact that the nitrous system won't come on at the line on the brake or 2 step. just a little insurence and is vary easy to wire. let me know if you want the diagram. set-up like this is vary good for breaking parts because it hits HARD!
Originally Posted by DAPSUPRSLO
I don't know the answer to your question and forgive me for the question i'm about to ask. Something i've always wondered, why would you want a two step with a transbreak? I can understand if you have a turbo and are looking for instant spool but why would any other combination need a two step when using an auto with a break? Thanks.
Like stated below, I do not want to have to watch the tach to get my RPMs in the right place.
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OK, i'm new to this automatic game so i'm learning here. I'm waiting on my stuff but one of those items is a th400 with a break (used to have a six speed). I was under the impression that you just hit the button for the break, floor it and then your motor goes up to whatever rpm your true stall point is of your converter, and then you hit the button once again and it takes off. Is that not the case?
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Originally Posted by DAPSUPRSLO
OK, i'm new to this automatic game so i'm learning here. I'm waiting on my stuff but one of those items is a th400 with a break (used to have a six speed). I was under the impression that you just hit the button for the break, floor it and then your motor goes up to whatever rpm your true stall point is of your converter, and then you hit the button once again and it takes off. Is that not the case?
Originally Posted by Blown408
It sounds good, but I don't think you can run the digital-6 on the LS1 with individual coils. Correct me if I am wrong.
Originally Posted by DAPSUPRSLO
OK, i'm new to this automatic game so i'm learning here. I'm waiting on my stuff but one of those items is a th400 with a break (used to have a six speed). I was under the impression that you just hit the button for the break, floor it and then your motor goes up to whatever rpm your true stall point is of your converter, and then you hit the button once again and it takes off. Is that not the case?
I have heard the same thing however a 2-step has got to be be better for the trans/converter. Instaed of using the 2-step to limit engine Rpm you are using the converter/trans....that's can't be good.
Originally Posted by Daniel_z28
I have heard the same thing however a 2-step has got to be be better for the trans/converter. Instaed of using the 2-step to limit engine Rpm you are using the converter/trans....that's can't be good.
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
Originally Posted by Daniel_z28
I have heard the same thing however a 2-step has got to be be better for the trans/converter. Instaed of using the 2-step to limit engine Rpm you are using the converter/trans....that's can't be good.
I will be wiring my Harlan 2Step in with the TB and N2O, for the reasons stated above. I can dial the launch rpm in, have the foot to the floor and nitrous armed waiting for the buttons release, then BAM off I'll go. I havent even wired up the H2S or Harlan Shift Light either, but realize the few runs I have made with the combo, I need too. Cant wait. Any diagrams for this combo, H2S, HSL, TB and N2O? Thanks
Originally Posted by DERTY
What's not good about it? The fluid coupling locks up the converter at stall speed. The trans still builds heat regardless of the two step because you're still pumping fluid through converter. You're just not stalling it up on the brake. The trans still locks first and reverse together. The only reason on a NA or N2O setup to need a transbrake with a two step is simply to control launch RPM below stall speed. Besides that, just hold the button down and release when you are ready to go.
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
So, your stall speed will increase as boost goes up. That will continue until the torque increase tops out. Then hold on. We only used the two step on Kevin's car to build boost faster (advantage of it on a turbo application). Otherwise, you may find that it works the best straight off the brake if your converter works good.
SuperC1, you asking about in the tune? If so, then not in an Auto. E.g. my rev limiter is at 7400rpms, my stall is 4,000rpms. If I hold the tranbrake, and floor the gas, the engine revs up to the stall speed, laying on the converter which generates more heat in the trans. But it wont rev to 7400rpm. When I launch it will shoot up to whatever rpm I shift I at. Besides you can dial your converter in as well, by launching at different rpms for different track conditions etc..Many converters like a small flash rpm, say 500, so I would set the H2Step for 3500 or so. Then brake, floor it, stutter and go.
Originally Posted by CAT3
SuperC1, you asking about in the tune? If so, then not in an Auto. E.g. my rev limiter is at 7400rpms, my stall is 4,000rpms. If I hold the tranbrake, and floor the gas, the engine revs up to the stall speed, laying on the converter which generates more heat in the trans. But it wont rev to 7400rpm. When I launch it will shoot up to whatever rpm I shift I at. Besides you can dial your converter in as well, by launching at different rpms for different track conditions etc..Many converters like a small flash rpm, say 500, so I would set the H2Step for 3500 or so. Then brake, floor it, stutter and go.