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So I've decided to do a rebuild on my 4l60e car is a 95 trans am and has a 94 4l60e in it so I have a trans and pcm mix up. not only that but there was some fine metal shaveings on the magnet in the pan so the trans needs redone.I think I'm going to rebuild the 94 trans and put it back in and since I'm going with the manual valve body and plan on wiring the tcc to activate by a switch. so the pcm will have no controll over the trans so I figure it really dose not matter if the trans is a 94 am I correct in this assumption? Next how would I wire up the tcc to activate by a switch I've heard people say they did it but never really gave much info on how it was done. Do I hook the switch to a power source then find the wire that activates the tcc and hook it up to the switch? Also is there a good write up on how to put a manual valve body in a 4l60e ive scoured the internet for info but have not found much. On the install or setup of a fmvb in a 4l60e.
You could use a TCC lock-up switch kit for a THM700-R4 but disregard the pressure switch for the valve-body in the kit.
Use a ported- vacuum source with the vacuum switch to pass a ground connection to a toggle switch.
Find an ignition-switched 12V+ source, and pass it through the brake pedal switch, to same toggle switch.
When you are cruising on an expressway in forth-gear. flip the toggle switch on. TCC will lock.
Pressing the brake-pedal will unlock the torque-converter (unless the car is still making high ported vacuum... if so it will lock again when off the brake).
When the car slows down, ported vacuum will drop and the TCC will unlock.
You could use a TCC lock-up switch kit for a THM700-R4 but disregard the pressure switch for the valve-body in the kit.
Use a ported- vacuum source with the vacuum switch to pass a ground connection to a toggle switch.
Find an ignition-switched 12V+ source, and pass it through the brake pedal switch, to same toggle switch.
When you are cruising on an expressway in forth-gear. flip the toggle switch on. TCC will lock.
Pressing the brake-pedal will unlock the torque-converter (unless the car is still making high ported vacuum... if so it will lock again when off the brake).
When the car slows down, ported vacuum will drop and the TCC will unlock.
Thanks again you have been a big help I'm thinking of getting this kit will this work. there are cheaper ones but this one looks like it gives you finer controll or did you have a different kit in mind.
https://www.summitracing.com/parts/bmm-70248
Last edited by ss27gogeta; Jul 8, 2020 at 06:05 AM.
I agree with vortec
vacuum switch, brake interrupt, 4th gear pressure switch...use them all together.
Optionally use a temp switch to make sure the trans is warm before lockup.
I've done this loads of times. It is the best combo for lockup I've found
Damn those kits just keep getting more and more expensive!
Nah... you can't use the case connectors in that kit.
Actually, the only thing there you would use is the vacuum switch.
You could alter the internal wiring and use it without the case connectors...
I have seen people drill and tap the servo-cover...
So they can use the 4th gear pressure-switch...
But I fell that is just going to be a fail-point/ leak.
If you wish to have the servo-cover professionally machined on a bridgeport... then go for it.
Look at this photo for a kit from Painless-Wiring.
It is stupid expensive... like $200 American.
The last time I purchased any kit like this was probably 15 years ago...
I think I pad $75 for this same kit back then.
Sorry, the more important part of this...
In the kit is the following:
-New TCC lock-up solenoid (you can use)
-Vacuum switch (you can use)
-Brake-pedal switch (you can use, but probably do not need to)
-4th gear pressure switch (there is no place to use this on a 4L60E valve-body)
-Some internal wiring (you can use if altered)
-Some external wiring (you can use if altered)
Damn those kits just keep getting more and more expensive!
Nah... you can't use the case connectors in that kit.
Actually, the only thing there you would use is the vacuum switch.
You could alter the internal wiring and use it without the case connectors...
I have seen people drill and tap the servo-cover...
So they can use the 4th gear pressure-switch...
But I fell that is just going to be a fail-point/ leak.
If you wish to have the servo-cover professionally machined on a bridgeport... then go for it.
Look at this photo for a kit from Painless-Wiring.
It is stupid expensive... like $200 American.
The last time I purchased any kit like this was probably 15 years ago...
I think I pad $75 for this same kit back then.
Sorry, the more important part of this...
In the kit is the following:
-New TCC lock-up solenoid (you can use)
-Vacuum switch (you can use)
-Brake-pedal switch (you can use, but probably do not need to)
-4th gear pressure switch (there is no place to use this on a 4L60E valve-body)
-Some internal wiring (you can use if altered)
-Some external wiring (you can use if altered)
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How to wire tcc to work off a switch 
