When your car shifts gears, does the tach needle bounce a little before settling in at the new RPM? Its like the needle dips to a lower RPM on the tach, and then gets moving back up the range again. My 300 does this but my 400 doesn't. Is this normal?

I'm really just looking for something to tinker with here.

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'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E