DualQuad440
Member
I have a 71 727 trans and I believe it has some sort of trans brake on it but can not find what brand for replacement parts. There is a block mounted externally on the passenger side with a 2 wire solenoid on top. Haven't traced the lines yet but they definitely go to the trans ports (just can't say which ones). One wire to ground, one power wire to a button on my shifter. This is a fairly old build, my guess 20 years. The closest thing I can find online is a TCI line lock PN 861200. The solenoid has failed so I am looking to replace it. I haven't dropped the pan so I'm not sure what's going on in the valve body but I do know the trans itself functions normally. All gears work smoothly, forward and reverse. Is this an older style trans brake? Old drag racing setup? Any help is much appreciated. Can get pics if needed.