mine does about the same speed at those rpm's. your mileage seems way too low for highway driving imo.
my car used ot give a chirp going into 2nd as you describe but the tranny wasn't getting enough vacuum. turning up the vaccuum a bit made that stop, and hopefully resulted in a little less stress on the diff.
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1984 300D Turbo - 231k....totalled 11/30/07 RIP
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