Question about 1997 Pontiac Grand Am

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REAR WHEEL LOCKS WHEN BRAKING

LEFT REAR ONLY

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The automatic adjusters need to be replaced

Posted on Dec 12, 2008

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2005 Chevy Equinox left front brake caliper locks up


Your vehicle should have rear drum brakes...They have to be adjusted manually for correct adjustment...People say they self adjust but it is not good enough....by adjusting the rear it will decrease the pressure on the front and deliver equal braking...This will help eliminate caliper pressure overload....I'm not saying that is your caliper problem but it is insult to injury and will save the life of front brakes.....Now your caliper problem..FYI..A rule of thumb is anytime you change a caliper you should always replace both calipers to have identical braking pressure".The same with brake hoses and rear wheel cylinders.....The caliper that froze in the first place got hot and boiled the brake fluid and quite possibly partially collapsed the caliper brake line/hose inside as Clint and Frank stated....I am going to guess that the first caliper froze under normal conditions however got hot enough to internally damage the caliper line/hose...Then you may think of the pressure regulator being bad in which case could be a problem......So this is what you do".Since we know the left front caliper line/hose has been exposed to heat it needs to be replaced anyway...also the fluid was boiled and it needs to be changed / bled...The new caliper that froze should be ok unless it was bad off the shelf which is rare but possible."..Change the line/hose,bleed the brake system and let the mechanic test drive before you pay and leave..The mechanic will know before driving if the new caliper that froze is bad or not by rotating the wheel...This is the cheapest way...And you will know if the pressure regulator is bad or not just by bleeding system........I hope this helps....."Brooks/Metalpoet....."....

Jun 13, 2014 | 2005 Chevrolet Equinox

1 Answer

Left front wheel locks up when braking


Could be your brake caliber sticking,which will cause the brakes to wear uneven,right side will be newer than left,here's a guide in replacing,check pads to see if they have worn uneven,when replacing calibers,it's best to change both.

Feb 27, 2013 | 1995 Nissan Pickup

1 Answer

Pug 206 t reg handbrake locks on left hand side rear wheel any ideas how to fix this or how a can cut handbrake cable


sorry friend , but im not an expert. ANYWAY, I SAW YOUR CALL! cutting a hand brake cable is a nonsense and worse, a big danger. This back wheel is permanently sttoped or braked because the spring mechanism that bring them to free wheel is stucked. the springs can no longer pull the braking system to the home position. The solution is disassembly the back wheel drum, clean it , replace the springs ( if the foot brake, an independent system ) is working ok.this is only the basic procedure. Check also if the cable in the back ( divided in two for separate back wheels ) is not "dry" out of lubricating!

Dec 26, 2012 | Cars & Trucks

1 Answer

I removed and reinstalled again the proportional valve in my corolla 99 XL (AE110) and since then ,when i suddenly press hardely the brakes , the cars spins from its tail...why it spins?


did you bleed the air from the whole brake system? if not, that could be one of the causes of your uneven braking. The other is a faulty rear caliper.

Jul 06, 2012 | Cars & Trucks

1 Answer

1996 camery station wagon , 4 wheel disc brakes. need to replace brake lines in the rear. what is the name of the junction block , with the actuator in the rear? All 4 rear lines go to and leave this...


Hello, first you Toyota has dual braking system. It goes like this: Left front brake with right rear brake, the right front brake with left rear brake. This a braking safety system that has been incorporated in auto/trucks for a few years now. If brake line is broken. loose wheel caliper, blow caliper piston, any thing that happens to the brake system. You will still have two wheels that have their hydraulic system. Also, the emergency brake will a manual system for the rear wheels.


Why do you need to change your auto brake lines? That valve you are talking about is a load stabilizer valve. It used to limit the amount of hydraulic fluid as more load is place in the rear of your Toyota. Example. by press on the brake pedal, it activates hydraulic pressure to the four wheel disk braking system. The braking system needs to stabilize the hydraulic pressure to the wheel to keep the vehicle moving in a forward motions. Now, by loading the rear of the vehicle this transfer the load disposition of the vehicle by making it heaver in the rear. Therefore, the load compensator valve limit the amount of hydraulic pressure to the rear brakes.



Another thing to remember about this rear load valve, they will get plugged. and the vehicle will not have enough braking pressure for the rear wheels. I hope I answer you question about this load portion valve in the rear of Toyota. GB...stewbison

Sep 21, 2011 | 1996 Toyota Camry

1 Answer

I have a 1993 Toyota pickup truck and I am having a brake problem. I have replaced the brake pads, calipers, brake booster, lower lines, checked for vaccum, master cylinder and I still do not have brakes.


Hello, do you have brake in the front or in the back or both? Have you bled the air out of the braking system? You need to think this through instead of RR--remove and replace. The hydraulic brake are the most reliable system that the brake shoes or pads could be down to the metal and it would still stop the vehicle. You lose a brake line or brakes on one wheel, and it will still stop the vehicle with two wheel cylinder or pads working. The brake system is diagonal that is; left front/right rear and right front/left rear. Therefore, if the vehicle loses any one braking system the other will work.


Now, on your Toyota Truck there is load compensator valve hook to the frame with the two rear wheel line going into this valve. The a lever the attached to the rear differential. The way it suppose to work is when a load in placed in the bed of the truck. The load dynamic will position the differential by the load pushing down on the bed. This causes the load lever arm to change position and slightly closing the valve; in turn, limits the brake pressure on the rear wheels.



I don't know why Toyota Motors installed this load compensator valve. It more trouble than what it worth. I have removed these load valves, and took it apart, and plug the valve piston hole with a brass plug. This lets the brake pressure flow evenly through out the braking system.



Remember, you need to bleed the braking system of air and I mean all the air bubbles for the braking system could operate appropriately to manufacture specification. GB...stewbison

Aug 30, 2011 | 1993 Toyota Pickup

1 Answer

Drivers side rear brake locks up on severe braking, then releases and I have no brakes


If you are dealing with ABS brakes you probably have a bad wheel cylinder on that wheel and air in the line. Replace the wheel cylinder and bleed the system.

Aug 26, 2010 | 1989 GMC Sierra

1 Answer

I HAVE A 2001 FORD WINDSTAR , wHEN BRAKING i GET A LOUND NOISE FROM THE LEFT REAR WHEEL, THE BRAKE SHOES HAVE BEEN REPLACED, NEW REAR DRUMS, THIS ONLY HAPPENS WHEN APPLING THE BRAKES. iN ADDITION to the...


I hav e a 2001 Windstar And I thought my problem was in the rear also but the sound was echoing from the front. It so happened that the Front caliper bracket was loose.

Nov 24, 2009 | 2001 Ford Windstar

1 Answer

Unbalanced rear wheel braking 1997 V40 Automatic


what year is this car 97 cant be correct,what state requires brake pressure test?/get a second test done some where else unless this car pulls or you have noticed a problem/or replace the left rear caliper if you beleave the test are correct

Sep 24, 2008 | 2001 Volvo V40

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