2004 Nissan Maxima

Dear Doctor: I am the original owner of a 2004 Nissan Maxima 3.5 SE that has 147,000 miles. This car has always been serviced by the book by my local mechanic. Recently, the car (only occasionally) downshifts with a “lurch” when slowing. Upshifting is never a problem.  Once in a while when I put it in gear it takes a second or two for the transmission to engage (both forward and reverse). There are no trouble codes or engine lights on. The transmission was serviced at 60,000, 120,000, and 135,000 miles. Where do you suggest we look to define and/or correct this problem? Ed

Dear Ed: There are no history faults with this problem. Have the transmission shop check for 1 TSB on the transmission. Second, make sure the correct transmission fluid has been used when the fluid was changed. The delay in gear engagement usually is connected to low transmission line pressure. There are some transmission fluid additives that can reduce harsh shifting, both up and down shifts. — Junior Damato, Motor Matters

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