I had the same problem. Changing just those springs stiffened up all the shifts, taking care of my slight 2-3 flare, and easing the 1-2 pop a little.

Now that they all shift similarly, I am planning to use synthetic ATF to smoothen it out. If that doesn't work, I might give the modulator a look.

Of course, this is after setting the vacuum with the "donut" disc and 2-way splitter included.

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1982 300CD Petrol/Black Leather