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Originally Posted by PaulH
What's the issue with the vacuum pump? I have an '87 300SDL that shifts fine. The mileage is only about 76000. Should I be changing the vac. pump on the front of the engine for some reason?
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76,000, you shouldn't have to worry yet, I should, however. Dave told me that the difference between the vacuum pumps is that the new one has 4 screws on the front and the old one doesn't. At 180,775 miles, i'm still on the original pump and considering a replacement before trouble strikes.