1978-87 Chevy Truck Front Disc/Rear Drums Proportioning Valve
Works on all 1978-87 Chevy and GMC full size trucks that have front disc brakes and drum rear brakes.
Works on half ton through one ton, 2 and 4 wheel drive
Our Proportion Valve comes with a 1 year warranty.
For use on Disc/Drum Setup Only

Disc/Drum Proportion Valve

Our brake proportioning valve has a 9/16"-18 connection for Rear Brakes & Dual 3/8"-24 ports for the front brakes.
The connections from the Master Cylinder are 1/2"-20 and 7/16"-24.
This valve comes with a 1 year warranty.
We also offer a pigtail for the prop valve wire sensor and a prop valve bleeding tool in the related items section of this page.

If you drive a Chevrolet or GMC full-size truck from model years 1981 - 1987, then this is the correct brake proportioning valve for your front disc and rear drum brakes. This part works on full-size Chevy and GM trucks from half ton through one ton, whether it's a 2-wheel drive or a 4-wheel drive.

1981 Full-Size Chevrolet Truck
1982 Full Size Chevrolet Truck
1983 Full-Size Chevrolet Truck
1984 Full Size Chevrolet Truck
1985 Full-Size Chevrolet Truck
1986 Full Size Chevrolet Truck
1987 Full-Size Chevrolet Truck
1981 Full-Size GMC Truck
1982 Full Size GMC Truck
1983 Full-Size GMC Truck
1984 Full Size GMC Truck
1985 Full-Size GMC Truck
1986 Full Size GMC Truck
1987 Full-Size GMC Truck

Vehicle Applications

This part is designed to fit the following vehicles.

Chevy Truck 1978
Chevy Truck 1979
Chevy Truck 1980
Chevy Truck 1981
Chevy Truck 1982
Chevy Truck 1983
Chevy Truck 1984
Chevy Truck 1985
Chevy Truck 1986
Chevy Truck 1987
GMC Truck 1978
GMC Truck 1979
GMC Truck 1980
GMC Truck 1981
GMC Truck 1982
GMC Truck 1983
GMC Truck 1984
GMC Truck 1985
GMC Truck 1986
GMC Truck 1987

Warranty Information

1 year

Customer Reviews

Average 5 out of 5 based on 31 reviews

Write an online review and share your thoughts with others.

Brakes

Review by Robert Gordon from , on 11/26/2018

The proportional valve that I received for the brakes on my 1981 Chevy pick up save the day now I can’t stop while I am pulling a boat.

Dave's Review

Review by David Mood from , on 11/20/2018

This valve was just like the original. Perfect

Great match

Review by scott herrling from , on 7/20/2018

For a 32 year old truck, this part was a identical match, and that was very nice.

rare part, export to Germany

Review by Andreas from , on 3/14/2018

I am glad I found carolina classic trucks - the break part for my 1984 CUCV Blazer can´t be found in Germany. Unfortunately, you don´t ship to Germany - but I have friends in the USA who received your shipment and sent it off to me.. thanks!

Chevy Brake Proportioning Valve

Review by Liz from , on 2/19/2018

I got this for my 88 chevy V20 silverado suburban. Fit perfectly, and the brakes are amazing. The original one was not working, then it started leaking. So happy with this purchase.

excellent

Review by Melton from , on 2/5/2018

This proportioning valve was and exact replacement, no modifications were required.

Perfect fit and works well

Review by Dave from , on 1/9/2018

I searched locally and could not find anything OEM or even aftermarket. Installed exactly the same as original and works great.

Tech

Review by Dale from , on 10/30/2017

Works great better than the original except they could learn how to debur it very sharp will cut your hands

Works great

Review by Ricky Godfrey from , on 9/4/2017

This proportioning valve made my brakes work like brand new I would buy any brake parts that I need in the future from Carolina classics worth five stars easy

1978-87 Chevy/GMC Full Size Truck Front Disc/ Rear Drums Proportioning Valve

Review by Bruce L. from , on 8/8/2017

Worked fantastic on my brothers 1986 Chevy Pick up. connected right up with existing brake lines. Restored excellent Braking, best it has ever been. no more rear wheel lock up. Original OEM valve was shot.

View all 31 reviews