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Old 10-15-2020, 10:17 AM   #5
72c20customcamper
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Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,143
Re: All new brake system: rears lock up and drag with weight in bed?

Seems weird the rears would lock up when loaded only . If it was the portioning valve giving to much pressure they would lock all the time more so when empty. Same with the master. Could it be the parking brake is engaging when the rear drops a little? Could be causing the cable to tighten .
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72 c20 custom camper Husky edition,
66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark
1969 AMX ,
1968 c20 stepside ,85 K20
1977 Suburban sold
68 anniversary.
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