1990 300zx NA 2+2 auto transmission shifts gears at 5k rpms

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
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dannysfairlady
Posts: 2
Joined: Wed Mar 09, 2016 2:17 pm
Car: 1990 Nissan 300zx 2+2 N/A Red Interior

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Quick story i bought a 1990 300zx NA 2+2 auto transmission and my transmission too is having problems shifting. It'll rev all the way to about 5k rpms and then jump into the next gear. my problem is i don't want to have to buy another transmission so cold it be the tcu? ALSO how do i even replace it? :wtf2:

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nissanfreak12
Posts: 1709
Joined: Sun Jan 23, 2011 4:07 pm
Car: 92 300zx 2+2 TT
Location: Denver, CO

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Check your TPS, make sure it is correctly adjusted.
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beamin1
Posts: 4
Joined: Sun Mar 13, 2016 10:04 am
Car: 1990 300zx 2+2 NA

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TPS adjustment as mentioned, also check for vacuum leaks, good luck.
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