If it is really squirrely on wet pavement in the rear, for sure it's the rear links. You are due, they go at about 150,000 or so in most cars. Not a bad job, let me know if you need them, there are some hints to help get the torque link in.

Vac modulators are the same, except the gasser is just a line from the manifold. If you have low vac for any reason, the tranny will shift hard. Another clue is throttle lag off idle -- if it hangs, then roars off, for sure you have a vac leak.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!