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90-92 Cut and plug stock proportioning valve or buy a T that is already right thread

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Old Dec 20, 2025 | 06:53 PM
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Aaron91RS's Avatar
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From: St. Louis
Car: RS
Engine: LS1
Transmission: T56
Axle/Gears: 9" for the ladies
90-92 Cut and plug stock proportioning valve or buy a T that is already right thread

I did the whole cut, flare, fitting, aftermarket proportioning valve thing years ago on my other 3rdgen. Then you just end up running the valve wide open because rear brakes don't ever work to great any way so the valve is pointless.

That said at this point in time does someone make the correct T fitting for the 90-92 so you don't have to cut / flare new fittings? If not be a lot cooler if they did.
Does anyone make a direct fitting to connect the rears without having to put on new fitting and with different thread sizes?

So assuming something like that doesn't exist has anyone cut the proportioning valve in half. Gutted it and threaded and plugged each end of the cut pieces? That way all the stock fitting work and I don't have to cut and flare everything.
Again not worried about 'proportioning' so please don't tell me to get an adjustable valve. Have one in the other car. Pointless on my rear disc brakes.

No just me?


Last edited by Aaron91RS; Feb 17, 2026 at 03:28 PM.
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