i have a 1990 cadillac sedan deville .. it runs Little rough but no major

please help

New member
problems really, but have noticed a? i have a 1990 cadillac sedan deville .. it runs alittle rough but no major problems really, but have noticed a surge and some hesitation on take off and acceleration . i havent had my transmission flushed it has 193,563 miles on it but it does smell burnt...talked to a mechanic they stated not to flush cause it could futher damage transmission please help
 
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