What is the Proportioning / Combination Valve all about?
\n\n
Your braking system relies on hydraulic pressure to operate. When you depress the brake pedal, brake fluid is pushed through the system to the wheels. Fluid pressure is responsible for actuating both disc brake calipers, as well as drum brakes. However, there are numerous components in line between the brake pedal and the brakes themselves, including the combination valve.
\n\n
The combination valve is responsible for metering fluid to disc brakes, as well as fulfilling tasks done by both the pressure differential switch and proportioning valve (which is responsible for reducing the fluid pressure in the lines leading to the rear drum brakes). This is necessary because of how brakes work in terms of lockup \u2013 the more weight there is on a wheel, the more force can be applied without locking up the brakes. In rear drum brakes, the weight on the wheel is comparatively small (the weight of the engine on the front wheels is considerable).
\n
","articleDesc2":"
Keep in mind:
\n\n
\n- In modern cars that employ combination valves, replacing the entire valve body is necessary if the proportioning valve fails.
\n- There is no way to check operation on this type of valve unless it has failed completely.
\n- The valve may have failed due to many reasons, including debris in the brake fluid.
\n
\n\n
How it's done:
\n\n
\n- The defective proportioning combination valve brake lines are disconnected
\n- The defective proportioning combination valve is removed from the vehicle
\n- The new proportioning combination valve is installed and the brake lines are connected to valve
\n- The brake system is bled and purged of air in the system and the brake fluid is refilled
\n- The vehicle is road tested for proper brake operation
\n
\n\n
Our recommendation:
\n\n
Follow your automaker\u2019s recommendations on brake system service to ensure that the fluid remains in good condition and free of debris. Have your braking system maintained by our expert mechanics to ensure that any potential problems are caught as soon as possible. Driving with a failing proportioning valve puts you at increased risk.
\n\n
What common symptoms indicate you may need to replace the Proportioning / Combination Valve?
\n\n
\n- Rear brakes lock up easily, particularly on wet pavement
\n
\n\n
How important is this service?
\n\n
While it is still possible to drive with a failed or failing proportioning valve, it\u2019s not recommended because it decreases your safety while increasing the risk of being involved in an accident because your rear brakes lock up under even light loads. Have the entire combination valve assembly replaced immediately.
\n
"},"reviewsAndRatings":{"reviewsData":{"make":null,"model":null,"jid":null,"city_id":2013,"state_id":null,"review_count":10,"mechanics":[{"id":1158484,"name":"Attila","login":"attila","mech_location":"Belleville, NJ","experience":19,"avatar_url":"https://res.cloudinary.com/yourmechanic/image/upload/dpr_auto,f_auto,g_face,q_auto/v1/mechanic/avatar_images/8179699201266613102","avatar_path":"mechanic/avatar_images/8179699201266613102","profile_url":"/pro/attila","average_rating":5,"ratings_count":906,"reviews":[{"rating":5,"content":"Excellent work. Put in the extra effort get job done. Great to have this fixed safely home. Will be glad to book again.","author":"Patrick","review_date":"2018-03-26T18:31:55-07:00","service_location":"Montclair, New Jersey","year":"2011","make":"Mitsubishi","model":"Galant","engine":"L4-2.4L","car":"2011 Mitsubishi Galant L4-2.4L","job":"Starter","job_id":208},{"rating":5,"content":"Showed up right on time and went to work despite the rain. He knows his craft very well and took excellent care of my car. I would recommend him highly!!","author":"Robert","review_date":"2019-07-18T20:21:50-07:00","service_location":"Montclair, New Jersey","car":"2007 Chevrolet HHR","job":"Oil Change","job_id":278}]},{"id":1641791,"name":"Luis","login":"lesqueda","mech_location":"North Las Vegas, NV","experience":15,"avatar_url":"https://res.cloudinary.com/yourmechanic/image/upload/dpr_auto,f_auto,g_face,q_auto/v1/mechanic/avatar_images/11282648832482511181","avatar_path":"mechanic/avatar_images/11282648832482511181","profile_url":"/pro/lesqueda","average_rating":5,"ratings_count":175,"reviews":[{"rating":5,"content":"Good job","author":"Warner","review_date":"2020-06-08T01:15:41-07:00","service_location":"Las Vegas, Nevada","year":"1999","make":"Kia","model":"Sephia","engine":"L4-1.8L","car":"1999 Kia Sephia L4-1.8L","job":"Proportioning / Combination Valve","job_id":506}]},{"id":362314,"name":"Joel","login":"jberkeley","mech_location":"Jacksonville, FL","experience":21,"avatar_url":"https://res.cloudinary.com/yourmechanic/image/upload/dpr_auto,f_auto,g_face,q_auto/v1/mechanic/avatar_images/3134437430512650305","avatar_path":"mechanic/avatar_images/3134437430512650305","profile_url":"/pro/jberkeley","average_rating":5,"ratings_count":987,"reviews":[{"rating":5,"content":"Very positive experience. Identified the correct problem quickly. I had to make a follow up appointment because the part had to be ordered. Joel arrived promptly both appointments. Very professional. There were no hidden charges. Made an unexpected car problem less stressful.","author":"Donna","review_date":"2016-03-04T22:13:16-08:00","service_location":"Jacksonville, Florida","year":"2003","make":"Kia","model":"Spectra","engine":"L4-1.8L","car":"2003 Kia Spectra L4-1.8L","job":"Proportioning / Combination Valve","job_id":506}]},{"id":842213,"name":"Oscar","login":"oromano","mech_location":"Columbia, MD","experience":24,"avatar_url":"https://res.cloudinary.com/yourmechanic/image/upload/dpr_auto,f_auto,g_face,q_auto/v1/mechanic/avatar_images/5307228726637689776","avatar_path":"mechanic/avatar_images/5307228726637689776","profile_url":"/pro/oromano","average_rating":5,"ratings_count":72,"reviews":[{"rating":5,"content":"Oscar was great person and very knowledgeable mechanic..","author":"Wayne","review_date":"2017-02-03T05:26:34-08:00","service_location":"Columbia, Maryland","year":"2001","make":"Dodge","model":"Ram 1500","engine":"V8-5.2L","car":"2001 Dodge Ram 1500 V8-5.2L","job":"Proportioning / Combination Valve","job_id":506}]},{"id":1077227,"name":"Kyle","login":"khumanthomas","mech_location":"Las Vegas, NV","experience":12,"avatar_url":"https://res.cloudinary.com/yourmechanic/image/upload/dpr_auto,f_auto,g_face,q_auto/v1/mechanic/avatar_images/17471232937843730010","avatar_path":"mechanic/avatar_images/17471232937843730010","profile_url":"/pro/khumanthomas","average_rating":5,"ratings_count":94,"reviews":[{"rating":5,"content":"Excellent highly skilled mechanic With great personality.","author":"Warner","review_date":"2020-07-11T21:19:24-07:00","service_location":"Las Vegas, Nevada","year":"1999","make":"Kia","model":"Sephia","engine":"L4-1.8L","car":"1999 Kia Sephia L4-1.8L","job":"Proportioning / Combination Valve","job_id":506}]},{"id":1557232,"name":"Miguel","login":"mamedina","mech_location":"Paterson, NJ","experience":21,"avatar_url":"https://res.cloudinary.com/yourmechanic/image/upload/dpr_auto,f_auto,g_face,q_auto/v1/mechanic/avatar_images/5927732755006669038","avatar_path":"mechanic/avatar_images/5927732755006669038","profile_url":"/pro/mamedina","average_rating":5,"ratings_count":232,"reviews":[{"rating":5,"content":"Miguel is very professional. He is always on point, and knows cars very well. He is efficient, completed my brake job and also made a suggestion for what I needed next for tip top performance, I appreciated that. Thank you will highly recommend him\uf60a .","author":"Lakosha","review_date":"2020-10-04T20:42:17-07:00","service_location":"Montclair, New Jersey","year":"2005","make":"Toyota","model":"Matrix","engine":"L4-1.8L","car":"2005 Toyota Matrix L4-1.8L","job":"Brake Pads Replacement (Front)","job_id":42}]},{"id":2019108,"name":"Gustavo","login":"gustavo582","mech_location":"Hackensack, NJ","experience":15,"avatar_url":"https://res.cloudinary.com/yourmechanic/image/upload/dpr_auto,f_auto,g_face,q_auto/v1/mechanic/avatar_images/16073924453983053125","avatar_path":"mechanic/avatar_images/16073924453983053125","profile_url":"/pro/gustavo582","average_rating":5,"ratings_count":59,"reviews":[{"rating":5,"content":"Gustavo was great. Did the work quickly and was very helpful. ","author":"Eric","review_date":"2021-03-29T16:36:51-07:00","service_location":"Montclair, New Jersey","year":"2012","make":"Toyota","model":"Highlander","engine":"V6-3.5L","car":"2012 Toyota Highlander V6-3.5L","job":"Brake Light Bulb Replacement (Driver Side)","job_id":37}]},{"id":951372,"name":"Tomas","login":"tomas579","mech_location":"Jersey City, NJ","experience":17,"avatar_url":"https://res.cloudinary.com/yourmechanic/image/upload/dpr_auto,f_auto,g_face,q_auto/v1/mechanic/avatar_images/3019716518491397280","avatar_path":"mechanic/avatar_images/3019716518491397280","profile_url":"/pro/tomas579","average_rating":5,"ratings_count":226,"reviews":[{"rating":5,"content":"Very professional, friendly and very quick he had the job done in 40 to 45 minutes, he also pointed out all the areas I should keep a eye on, I would definitely recommend him.","author":"Najeeullah","review_date":"2018-04-12T22:52:02-07:00","service_location":"Montclair, New Jersey","year":"2003","make":"Ford","model":"Expedition","engine":"V8-4.6L","car":"2003 Ford Expedition V8-4.6L","job":"Brake Pads Replacement (Front)","job_id":42}]}],"hide_description":true},"aggregateRating":{"jid":506,"extrapolated_service_count":44,"rating_count":4,"rating":"5.0","count_1_star":0,"count_2_star":0,"count_3_star":0,"count_4_star":0,"count_5_star":4},"linkToReviewsPage":"/reviews/?mktg_jid=506&city=2013","cityLinks":[{"title":"Proportioning / Combination Valve Replacement In Semmes, AL","url":"/services/proportioning-combination-valve-replacement/?city=semmes-al"},{"title":"Proportioning / Combination Valve Replacement In Wilmington, CA","url":"/services/proportioning-combination-valve-replacement/?city=wilmington-ca"},{"title":"Proportioning / Combination Valve Replacement In Dover, FL","url":"/services/proportioning-combination-valve-replacement/?city=dover-fl"},{"title":"Proportioning / Combination Valve Replacement In Winnetka, IL","url":"/services/proportioning-combination-valve-replacement/?city=winnetka-il"},{"title":"Proportioning / Combination Valve Replacement In Villa Park, IL","url":"/services/proportioning-combination-valve-replacement/?city=villa-park-il"},{"title":"Proportioning / Combination Valve Replacement In Methuen, MA","url":"/services/proportioning-combination-valve-replacement/?city=methuen-ma"},{"title":"Proportioning / Combination Valve Replacement In La Plata, MD","url":"/services/proportioning-combination-valve-replacement/?city=la-plata-md"},{"title":"Proportioning / Combination Valve Replacement In Wyandotte, MI","url":"/services/proportioning-combination-valve-replacement/?city=wyandotte-mi"},{"title":"Proportioning / Combination Valve Replacement In Creedmoor, NC","url":"/services/proportioning-combination-valve-replacement/?city=creedmoor-nc"},{"title":"Proportioning / Combination Valve Replacement In East Elmhurst, NY","url":"/services/proportioning-combination-valve-replacement/?city=east-elmhurst-ny"},{"title":"Proportioning / Combination Valve Replacement In Springfield Gardens, NY","url":"/services/proportioning-combination-valve-replacement/?city=springfield-gardens-ny"},{"title":"Proportioning / Combination Valve Replacement In Blandon, PA","url":"/services/proportioning-combination-valve-replacement/?city=blandon-pa"},{"title":"Proportioning / Combination Valve Replacement In Channelview, TX","url":"/services/proportioning-combination-valve-replacement/?city=channelview-tx"},{"title":"Proportioning / Combination Valve Replacement In Hill AFB, UT","url":"/services/proportioning-combination-valve-replacement/?city=hill-afb-ut"},{"title":"Proportioning / Combination Valve Replacement In Chester, VA","url":"/services/proportioning-combination-valve-replacement/?city=chester-va"}]},"repairPricingTableData":{"pricingData":[{"car":"2007|Pontiac|Grand Prix|V6-3.8L","labor":5760,"parts":52412,"url":"/cars/0/0","estimate":"$676","partsCost":"$524.12","laborCost":"$151.98","savings":"2%","averageDealerPrice":"$696.12"},{"car":"2015|Chevrolet|Malibu|L4-2.5L","labor":4680,"parts":61180,"url":"/cars/0/1","estimate":"$735","partsCost":"$611.80","laborCost":"$123.48","savings":"2%","averageDealerPrice":"$751.55"},{"car":"2015|Chevrolet|Sonic|L4-1.8L","labor":5040,"parts":7725,"url":"/cars/0/1","estimate":"$210","partsCost":"$77.25","laborCost":"$132.98","savings":"7%","averageDealerPrice":"$227.75"},{"car":"2008|Cadillac|STS|V6-3.6L","labor":4680,"parts":61180,"url":"/cars/0/0","estimate":"$735","partsCost":"$611.80","laborCost":"$123.48","savings":"2%","averageDealerPrice":"$751.55"},{"car":"2016|Audi|A3|L4-1.8L Turbo","labor":3600,"parts":36051,"url":"/cars/0/1","estimate":"$456","partsCost":"$360.51","laborCost":"$94.99","savings":"2%","averageDealerPrice":"$468.01"},{"car":"2012|Porsche|Panamera|V6-3.6L","labor":5040,"parts":62170,"url":"/cars/0/1","estimate":"$755","partsCost":"$621.70","laborCost":"$132.98","savings":"2%","averageDealerPrice":"$772.20"}],"sidebarTitle":"Need a new Proportioning / Combination Valve?","sidebarBody":"Get your Proportioning / Combination Valve changed by a top-rated mechanic at the convenience of your home or office."},"seoData":{"metaData":{"service":{"itemType":"https://schema.org/Service","metaProps":[{"itemProp":"url","content":"//m.whoreclub.com/services/proportioning-combination-valve-replacement/?city=montclair-nj"},{"itemProp":"areaServed","content":"Montclair, NJ"},{"itemProp":"serviceType","content":"Mobile Car Repair"}]},"organization":{"itemType":"https://schema.org/Organization","metaProps":[{"itemProp":"name","content":"YourMechanic"},{"itemProp":"legalname","content":"YourMechanic"},{"itemProp":"logo","content":"//m.whoreclub.com/assets/ym-logo-straight.png"},{"itemProp":"telephone","content":"1 (855) 347-2779"},{"itemProp":"url","content":"//m.whoreclub.com"},{"itemProp":"areaServed","content":"Montclair, NJ"},{"itemProp":"address","content":"Montclair, NJ"}]}}},"bookEngineState":{"quote":{"jobs":[{"id":506,"description":"Proportioning / Combination Valve Replacement"}]}},"serviceMerchandiserUI":{"heading":"Proportioning/Combination Valve Replacement at your home or office.","isDiagnosticJob":false,"costRangeMin":17224,"costRangeMax":86478,"serviceRating":5.0,"totalRatings":4,"benefits":[{"title":"Online Booking"},{"title":"Mechanic comes to you"},{"title":"12-month / 12k-mile warranty"},{"title":"Free 50 point safety inspection"}],"notFixedOnMobile":false,"jobTitle":"Proportioning / Combination Valve Replacement","cityName":"Montclair","seoFriendlyHeading":"","seoFriendlyTitle":"","ctaTextTitle":"","navBarCities":[{"id":9232,"name":"Greenville","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/greenville-sc","city_state":"Greenville, SC"},{"id":25324,"name":"Pasadena","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/pasadena-tx","city_state":"Pasadena, TX"},{"id":10263,"name":"Orlando","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/orlando-fl","city_state":"Orlando, FL"},{"id":8635,"name":"Charlotte","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/charlotte-nc","city_state":"Charlotte, NC"},{"id":19657,"name":"Chicago","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/chicago-il","city_state":"Chicago, IL"},{"id":25545,"name":"San Antonio","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/san-antonio-tx","city_state":"San Antonio, TX"},{"id":24056,"name":"Austin","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/austin-tx","city_state":"Austin, TX"},{"id":9514,"name":"Atlanta","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/atlanta-ga","city_state":"Atlanta, GA"},{"id":10370,"name":"Tampa","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/tampa-fl","city_state":"Tampa, FL"},{"id":6106,"name":"Washington","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/washington-dc","city_state":"Washington, DC"},{"id":27890,"name":"Los Angeles","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/los-angeles-ca","city_state":"Los Angeles, CA"},{"id":27167,"name":"Phoenix","featured_on_homepage":true,"featured_on_navbar":true,"url":"city/phoenix-az","city_state":"Phoenix, AZ"}]}}" data-trace="true" style="display: none">
