J truck parking brake question

[CLL]

Hi All, Why does the parking brake hold great when facing downhill, but is pathetic when facing uphill? Something with the geometry of the turning drum and the shoes I guess. Is there a fix? I tried adjusting it up till it bit good, but then the brakes would drag and heat up while driving!
Thanks, Chris

[wiley-moeracing]

Are the shoes on correct? Are the adjusters backwards? are the drums worn out? Are the shoes adjusted to fit the drums? Are your park brake cables worn/stretched out? Lots of question you need to check off.