Proportioning valve / rear brake problems

cooooledart said

I fixed the problem a while ago, it had nothing to do with the master cylinder but with the rear drums themselves. Works fine now

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Thanks for the update... Although it kinda sucks that problems are posted but need to be coerced for an answer if it was solved or not.. Common forum issues. It doesn't help anyone else who is spending hours and hours searching for an answer solve the problem.