PATC 518 overdrive kit

[oldirish]

I know there are lots of threads on this issue but I saw a post about a part that was used but is no longer made. PN 14014519 was used instead of the vacuum switch that currently comes in the kit, this link shows that it is available through this company. GM 14014519 Switch, genuine OEM part

The thread stated that it could resolve some of the performance issues with OD and lock up.

Just wondering if anyone has bought from this company and used this part with success?

 

[Clelan]

Vacuum switch for OD/LU kickdown
Part # TCI-CMP3766B

This TCI part is what I use on my home brewed version of the PAtC kit.

Cley

 

[Clelan]

Just a tip I learned the hard way. Put a relay in the system. If you don't, likely no vacuum switch will last.

Cley

 

[oldirish]

Cley,
My OD engages around 60 mph but I cannot kickdown to 3rd once it's engaged, do you have this same issue?
Ed

Vacuum switch for OD/LU kickdown
Part # TCI-CMP3766B

This TCI part is what I use on my home brewed version of the PAtC kit.

Cley

 

[Clelan]

No. My vacuum switch is wired to disable the OD and LU when you push the throttle open and vacuum drops off. This puts you back in 3rd gear.

Cley

 

[Clelan]

This video I made shows a bit more detail in how I did the controls for my transmission.

Cley

 

[oldirish]

No. My vacuum switch is wired to disable the OD and LU when you push the throttle open and vacuum drops off. This puts you back in 3rd gear.

Cley

Ok, this is my issue, it's not disengaging. I'm following the wiring diagram so I'm looking for the source of the problem. The transmission shifts up and down normally, just no kickdown.

 

[oldirish]

Update, I figured it out and it works great.

 

[Clelan]

Id love to hear what the problem was. Mine is wired differently i believe.

Cley

 

[Icetech]

Is there anything supporting that pipe/sending units? i would make a bracket to a pan bolt or something.. miles of bouncing will make a bad day happen...

 

[TrailBeast]

Is there anything supporting that pipe/sending units? i would make a bracket to a pan bolt or something.. miles of bouncing will make a bad day happen...

You mean like blowing the fluid out of the trans and burning it up from the slipping?
Mine are speed adjustable and under the hood on the back of the intake.
The tube runs up the top of the trans, so nothing is exposed under the car.

 

[Icetech]

You mean like blowing the fluid out of the trans and burning it up from the slipping?
Mine are speed adjustable and under the hood on the back of the intake.

Kinda what i pictured with them hanging in space My mind always goes to the worst case scenario

 

[MV8]

Id love to hear what the problem was. Mine is wired differently i believe.

Cley

One wire was on the wrong vac sw terminal (NC versus NO).

 

[gzig5]

Update, I figured it out and it works great.

Come on now.

 

[oldirish]

Is there anything supporting that pipe/sending units? i would make a bracket to a pan bolt or something.. miles of bouncing will make a bad day happen...

I'm planning on adding a shield to protect it.