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Originally Posted by andmoon
My 90 350 sdl will run between 71 and 75 mph at a constant 3000rpm. It isn't a rise and fall but differs from am to pm.
Is there that much slip in th TC or are my guages slacking?
The car runs smoothly and MPG has not changed.
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Are you one flat road (not accending or decending a hill) for both readings?
I see a couple hundred RPM change from cruising a constant 60 mph, to accellerating without a down-shift.
Jeff Pierce