-In Park the line pressure is dumped at the manual valve, and falls into the basement at some 5 to 30 psi.
-In reverse, the line pressure jumps to the max the pump is capable of; some 255psi. But worse, all this pressure goes straight to the L/R servo and hi drum(front clutch). And even worse; the accumulator is bypassed.
-So in the P to R shift the line pressure goes from absolute minimum pressure to absolute maximum pressure. Clunk is un-avoidable. A higher stall can absorb some of it.
-If the line pressure is set higher than normal it will aggravate this, and pulling the KD linkage ahead doesnt usually affect this as the internal adjustment nullifies this.I see no easy solution to this dilemma.
