7at. Weird behaviour.

markesc · 08-17-2021, 11:13 AM

I'm on my 2nd transmission with this car and had the same issue.

Strangely it's HIGHLY temp related.

So lets say I drive the car 4-8 minutes and it's warmed up; Go into store, come back out maybe 20 mins later.

The 3-4 up shift, about 20-40% of the time, will do this strange thing where the RPMS jump up, then it locks into 4th gear.

It's been doing this for the past 20-30k miles, only during the summer, and only after the car sits for a little while after being warmed up, and ONLY at partial 1/3rd -2/3rds throttle acceleration. If I have the hammer down completely, then it's fine, but still a bit harsher than I'd like.

Transmission was changed at 54k miles, I'm now at 82k miles, have not touched it at all.

Taking it to dealer for fluid change, GOD HELP ME they do not F it up!

I will never ever ever buy a hydraulic based auto from Nissan after this experience. I'm down for the 400z with the 6 speed next round!

Quote:

Originally Posted by Eris

Hello, people. Good day.

When up shifting from 3rd to 4th in manual mode, shifts are too severe and fast... seems like it were a double clutch transmission with how fast it changes, yet everywhere else is shifts at normal speeds. It also sometiems makes a tiny clicking noise. And ocassionally will 'slip' when changing... or what I think others call "flare"... it will jump around 300 revs up before going down and setting on 4th (again... also bullet fast).

This also occurs only when the accelerator is at load... and knly at around 3-4k revs... If I drive barely touching the pedal or if I up shift higher than 4500, it shifts normally.

The car was also scanned just 3 months ago for an unrelated issue; nothing came up.

Weird part is that... it only has 30k miles.

So if that gear is starting to slip... at 30k? And if it needs transmission fluid change or... umm... flush... at 30k ?

Those abrupt shifts dont really clunk... sometimes in general... and on other gears... but I think that happens nornally at times given these transmissions can a few times be a bit dim-witted... its just a tiny click.

There are also sometimes HUGE delays in manual mode when downshifting going really slow... from 2nd to 1st...
But thats always happened... mentioning it just in case.

Other than that... it's always up and down shifted normally and without issues... responsive...normal quick...no noises... and it still does... save for 3-4

Thoughts?

Thanks for reading.

Forgot to mention... the car has this common issue where when at normal operating temperature (oil at 200-220), it loses noticeable power... perhaps around 10-15%. Mentioning also in case it points to something.

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