There is a slide adjustment for the transmission cable located behind the aircleaner. You can try adjusting that to see if it makes a difference. This also helps if your car is upshifting too early. Make sure you mark it first so you can put it back if you have to.

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1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma