There is a bullitin on the series 8 toyotas'. In the lowering spool of the control valve there is a spring that is not capable to handle stress, and it breaks prematurely. Its much easier to remove the valve and take out the lower section of the spool. BE ADVISED, THAT AFTER YOU REMOVE THAT PARTICULAR SECTION (its in very tight), THAT IT GETS DAMAGED AND CANNOT/OR SHOULD NOT BE REINSTALLED.
P/N 67609-26601-71 about $132
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