Postby smj999smj » Thu Mar 16, 2017 2:47 pm
These transmissions come with NissanMatic Type "D" ATF from the factory, which is the same as Dexron II. If Dexron III/Mercon was used during servicing over the years, it could cause sticking in the valve body. So, you could try flushing the trans fluid and replacing it with either NissanMatic Type "D" ATF or, what I would use, a synthetic ATF recommended for Dexron II applications, such as Valvoline Maxlife ATF or Castrol Transmax Multi-import ATF. If after some time it still operates the same way, it could be that some seals have hardened or there is an accumulator issue. The transmission section of the factory service manual has a symptom chart which will give you possible causes in order of likelihood and diagnostic procedures, including the self-diagnostic test. Nico Club's site has free, downloadable service manuals if you need one.