Re: WTF steering: 72 4x4 K5
Make sure that you don't have a kink/blockage in any of the low pressure return lines that run from the hydroboost and steering gear back to the pump reservoir. Sounds like you may be "starving" the pump. If the problem started right after you added the power steering fluid with stop leak, I would suspect that the stop leak may have reacted badly with the ATF and caused a blockage somewhere.
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