The 1989 Jeep Wrangler came with a few different brake master cylinder options. The most common option was a power assist unit that used vacuum pressure from the engine to help apply the brakes. There was also an option for a hydro-boost unit that used hydraulic pressure from the power steering pump to help apply the brakes.
Either of these units would work fine for most people, but if you were going to be doing any off-roading or heavy duty driving, you might want to consider upgrading to a more heavy duty brake master cylinder.
The 1989 Jeep Wrangler brake master cylinder is a vital component of your vehicle’s braking system. It is responsible for providing the hydraulic pressure that activates your brakes. If your brake master cylinder fails, it can result in reduced braking power or even complete loss of brakes.
This can obviously be extremely dangerous, so it’s important to be aware of the signs of a failing brake master cylinder. Some common symptoms include a soft or spongy brake pedal, reduced braking power, and leaks from the master cylinder itself. If you notice any of these issues, it’s important to have your brakes checked by a professional as soon as possible.
Jeep YJ Brake Master Cylinder and Brake Bleed
Jeep Yj Master Cylinder Upgrade
If you own a Jeep Yj, then at some point you will need to upgrade the master cylinder. The stock master cylinder is not up to the task of providing adequate braking power for a vehicle that weighs over 4,000 pounds. A good aftermarket option is the PowerStop Z26 Master Cylinder.
This master cylinder provides 26% more stopping power than the stock unit and is a direct replacement for your Jeep Yj.
What is the 1989 Jeep Wrangler Brake Master Cylinder
Assuming you would like an in-depth explanation of a Jeep Wrangler’s brake master cylinder: A brake master cylinder is a vital component of a vehicle’s braking system. It is responsible for providing the hydraulic pressure necessary to operate the brakes.
The master cylinder is usually located near the firewall, under the hood, and is connected to the brake pedal by a pushrod. The 1989 Jeep Wrangler came equipped with either 10 or 12 inch brakes. The 10 inch brakes were standard on models with automatic transmissions and optional on manual transmission models.
The 12 inch brakes were standard on manual transmission models and optional on automatic transmission models. All 1989 Jeep Wranglers had four-wheel disc brakes. The 1989 Jeep Wrangler brake master cylinders are made of cast iron and have a bore diameter of 1-1/8 inches.
They are designed to work with both power and manualbrakes. Each brake master cylinder has two reservoir ports, one for the front brakes and one for the rear brakes. A separate port is also provided for the emergency (parking)brake system.
If your Jeep Wrangler is from the 1989 model year, then you may be having some issues with the brake master cylinder. This part can fail and cause problems with the brakes, so it’s important to know what signs to look for. When the brake master cylinder goes bad, you may notice that your brakes feel spongy or soft when you press on the pedal.
The pedal may also sink to the floor if you press on it too hard. You may also hear a hissing sound coming from under the hood when you use the brakes. If you experience any of these symptoms, then it’s time to replace your brake master cylinder.