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Re: fadeing brake pedal
Keep in mind that each wheel has to do its own "retracting"... and pulling fluid from the master cylinder in the process. The allows/helps the master cylinder to fully return.
Make sure the calipers are free to move in-out .. by greasing the splines, or pins, or whatever they slide on. (Different designs for different years) (The rubber o-ring around the caliper acts as a seal and a RETURN SPRING.)
If you have drums on the rear make sure the shoes are edge-lubricated so they will slide on the backing plate. Be sure the pistons are not stuck in the slave cylinders and there is silicone lubricant inside the dust boots. May be a good time to replace the wheel cylinders and the return springs and other hardware ... depends on rust/wear conditions.
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