Parts for your 1998 Subaru Forester-Brake wheel cylinders

1998 Subaru Forester brake wheel cylinders — what they do and when to replace them

Technical references including the Subaru Factory Service Manual for the SF series (1997–2002, Rear Brake section), the Subaru FAST parts catalogue, and common aftermarket data (Autodata/Haynes and Bendix/Repco listings) show that many 1998 Subaru Forester variants with rear drum brakes use hydraulic brake wheel cylinders. Foresters fitted with rear disc brakes (often higher-spec trims such as some GT models, market-dependent) don’t use wheel cylinders because the rear braking is handled by calipers. For AU/NZ vehicles, GX and similar trims commonly have rear drums with wheel cylinders, while GT-type trims commonly have rear discs.

On 1998 Foresters with rear drum brakes, the brake wheel cylinder sits at the top of each rear backing plate and converts hydraulic pressure into mechanical force, pushing the brake shoes out against the drum. That simple, robust action is why drums work so well as a parking brake and as a cost-effective rear service brake. Over time, seals can harden, bores can corrode, and dust boots can split, leading to leaks, a soft pedal, or one-sided braking.

As part of routine servicing, it’s smart to inspect the wheel cylinders at every rear brake service or rotation. Look for dampness or fluid trails on the backing plate, perished rubber boots, and uneven shoe wear. If there’s any sign of leakage or stickiness, replacing the cylinder is usually the best call. It’s good practice to replace wheel cylinders in axle pairs to keep braking even. While you’re in there, check the shoes, return springs, adjuster, and drum condition, and clean everything with proper brake cleaner—no petroleum-based products.

Bleeding after replacement should start at the wheel farthest from the master cylinder and work closer, using fresh DOT 3 or DOT 4 brake fluid that meets Subaru specs. A line spanner helps avoid rounding the flare nut on the brake pipe. If the cylinder has been leaking for a while, consider new shoes as contamination can reduce friction and cause grabby or noisy brakes.

• Typical symptoms of a failing wheel cylinder:
  • Soft or sinking brake pedal
  • Pulling to one side under braking
  • Fluid on the backing plate or inside the drum
  • Poor handbrake hold or uneven rear braking
• Service tips:
  • Flush brake fluid every 24 months or 40,000 km
  • Replace wheel cylinders in pairs
  • Adjust shoes correctly after refit for a firm pedal and even bite

For owners unsure whether their Forester has rear drums, a quick look through the rear wheel spokes will show a drum (closed face) vs a disc and caliper. Trim level, VIN decoding, or a glance at the build plate and workshop data will also confirm it.

Popular questions about 1998 Subaru Forester brake wheel cylinders

How can someone tell if their 1998 Forester actually has brake wheel cylinders?

If the rear brakes are drums, it has wheel cylinders, if they’re discs, it doesn’t. Many AU/NZ GX-style trims had drums, while GT-type trims often had discs. A quick visual check at the rear wheels, a VIN/trim lookup, or a peek in the service data will confirm it.

How often should brake wheel cylinders be replaced?

There’s no fixed interval. They’re replaced when leaking, seized, or showing damaged boots or pitted bores. Inspect at each rear brake service and flush the brake fluid every 2 years. When one cylinder needs replacement, doing both sides helps keep braking balanced.

What are the warning signs of a failing wheel cylinder?

Common red flags include a soft pedal, fluid on the backing plate, the car pulling to one side, and uneven shoe wear. If the handbrake performance drops or the rear brakes feel grabby, that’s another nudge to inspect the drums and wheel cylinders.