Transbrake woes

SC1448 · 07-22-2007, 01:27 PM

You may not be getting enough current (ampereage) to the solenoid from the delay box output terminal (assuming you're not using a relay in your brake circuit). You can have 12v showing on your voltmeter at the solenoid itself but that's not a guarantee that there's enough current there to operate the solenoid properly. Also make sure the wire from the box to the solenoid is heavy enough to carry the load demand of the circuit. Too small a wire gauge means increased resistance and aggravation factor. Don't forget about Ohm's law here.
Good luck....
-Don

Bob Verwold · 07-22-2007, 02:21 PM

Thanks Don.

Currently have 14 gauge wire approximatly 3 ft. long going to solenoid from delay box. Solenoid has 18 or 20 gauge on it. Don't know about Ohm's law. Will switch to 12 gauge wire. Will try anything at this point.

Bob

I do have a toggle switch inline so I can back up without holding the button.

07-23-2007, 08:16 AM

Quote:

Originally Posted by Bob Verwold

Thanks Don.

Currently have 14 gauge wire approximatly 3 ft. long going to solenoid from delay box. Solenoid has 18 or 20 gauge on it. Don't know about Ohm's law. Will switch to 12 gauge wire. Will try anything at this point.

Bob

I do have a toggle switch inline so I can back up without holding the button.

Get rid of that, it is a problem. You don't back up for so long that you need one and it can be the source of these problems.

Mike Hedger · 07-23-2007, 10:37 AM

Is this a Trans King valve body with the inturnal shifer? If so I ran into this problem on a dragster I drove for a while, After the burnout you depress the TB button to backup and you think everything is OK when you put it back into low but you have to slow down and stop in Nutral put it into drive then put it in low stop in each gear for about one second and it worked fine after that. I put another button on the wheel so backing up would not activate the shift timer or the TS timers and never had another problem. I don't like the TK internal shift cause you really can't tell if it has shifted on not. With a solinoid shifter I can look down and see what gear it is in. Hope this helps, Mike

Bob Verwold · 08-17-2007, 08:18 PM

Bill,
During the burnout, I shift manually, then go to neutral before pulling shifter back into low gear. The car does shift on an RPM chip. The chip is 7200. And I don't go that high on a burnout. But will try putting it in low gear, then drive then back in low. Sounds like you have about as much trouble as I do. Will be at Bowling Green/Beech Bend next weekend with new motor, new rear-end and plenty of beer. Stop by the trailer, I'll buy you a cold one. Park behind showers by ditch. Red truck and trailer. Thanks again.
Bob

07-22-2007, 01:27 PM	#1
SC1448 Member Join Date: Jun 2003 Location: Southampton, PA Posts: 226 Likes: 5 Liked 2 Times in 2 Posts	Re: Transbrake woes You may not be getting enough current (ampereage) to the solenoid from the delay box output terminal (assuming you're not using a relay in your brake circuit). You can have 12v showing on your voltmeter at the solenoid itself but that's not a guarantee that there's enough current there to operate the solenoid properly. Also make sure the wire from the box to the solenoid is heavy enough to carry the load demand of the circuit. Too small a wire gauge means increased resistance and aggravation factor. Don't forget about Ohm's law here. Good luck.... -Don

07-22-2007, 02:21 PM	#2
Bob Verwold Senior Member Join Date: Jul 2007 Location: Fayetteville Ohio Posts: 656 Likes: 0 Liked 0 Times in 0 Posts	Re: Transbrake woes Thanks Don. Currently have 14 gauge wire approximatly 3 ft. long going to solenoid from delay box. Solenoid has 18 or 20 gauge on it. Don't know about Ohm's law. Will switch to 12 gauge wire. Will try anything at this point. Bob I do have a toggle switch inline so I can back up without holding the button. Last edited by Bob Verwold; 07-22-2007 at 02:57 PM.

07-23-2007, 10:37 AM	#4
Mike Hedger Junior Member Join Date: Jul 2007 Location: Kemah TX Posts: 93 Likes: 0 Liked 1 Time in 1 Post	Re: Transbrake woes Is this a Trans King valve body with the inturnal shifer? If so I ran into this problem on a dragster I drove for a while, After the burnout you depress the TB button to backup and you think everything is OK when you put it back into low but you have to slow down and stop in Nutral put it into drive then put it in low stop in each gear for about one second and it worked fine after that. I put another button on the wheel so backing up would not activate the shift timer or the TS timers and never had another problem. I don't like the TK internal shift cause you really can't tell if it has shifted on not. With a solinoid shifter I can look down and see what gear it is in. Hope this helps, Mike __________________ Mike Hedger S/C 4646 MPH Racing and Fabrication

08-17-2007, 08:18 PM	#5
Bob Verwold Senior Member Join Date: Jul 2007 Location: Fayetteville Ohio Posts: 656 Likes: 0 Liked 0 Times in 0 Posts	Re: Transbrake woes Bill, During the burnout, I shift manually, then go to neutral before pulling shifter back into low gear. The car does shift on an RPM chip. The chip is 7200. And I don't go that high on a burnout. But will try putting it in low gear, then drive then back in low. Sounds like you have about as much trouble as I do. Will be at Bowling Green/Beech Bend next weekend with new motor, new rear-end and plenty of beer. Stop by the trailer, I'll buy you a cold one. Park behind showers by ditch. Red truck and trailer. Thanks again. Bob