YakkoWarner
Full Access Member
- Joined
- May 29, 2024
- Posts
- 665
- Reaction score
- 1,084
- Location
- Central Texas
- First Name
- Wolf
- Truck Year
- 1989
- Truck Model
- R2500 Suburban
- Engine Size
- 454
I've just started noticing a faint sinking of the brake pedal when sitting at a light. My suspicion is the master cylinder seals are starting to go and allowing fluid to blow by. I do not see any reduction of fluid level in the master, and do not see any leaks at any of the wheels or along the frame rails. Being a full float rear axle means I do not have the ability to pull the drums for a full rear inspection, that requires pulling the axles out. I just want to run this by others who know more than me before spending $$$ on a new master cylinder if that is unlikely to be the issue.
