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Old 05-21-2012, 02:01 AM   #1
Suburban_Tyler
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Join Date: Aug 2011
Location: Jefferson City, Missouri
Posts: 62
proportioning valve Need more rear braking power

I have a 1990 R1500 2wd Suburban. The rear brakes need more power to them. I tried tightening the shoes and bleeding the brakes. When I have a trailer hooked on it gets down right scary trying to stop. Thats with about 1,500lbs behind the Suburban and not a whole lot of tongue weight. If the windows are down I get hear the tires starting to slip. I can literally get better rear brake power if I push the parking brake down. Is the a different proportioning valve I can get that would do better as far as getting more power to the rear brakes. Normal driving it stops fine. Always has a good pedal. If I have to make sudden stops you can count on one or both of the front tires locking up depending on the surface.
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