I have a 93 caprice with 305 and 700r4 trans. i only drive in overdrive when im on expressway or at speeds over 45 mph. Saves gas on the expressway but driving in overdrive at low speeds kills your mpg.
The first "D" after Neutral
yes that's how your supposed to drive it will go into o/d above 50 mph
Could be in need of a tune up.
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700r4
Yes
No , a 1986 Chevy Caprice is REAR wheel drive
overdrive could be ready to go out might be the cluthes
real expensive
The transmission in the 1991 Chevy Caprice is a 4 speed automatic with overdrive. This transmission is found in both the base and classic trims.
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Overdrive is the normally allowed position ( it won't shift into overdrive until the speed is fast enough )