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-   -   Rpm jump when shifting (7at) (http://www.the370z.com/engine-drivetrain/105828-rpm-jump-when-shifting-7at.html)

louiey370z 07-20-2015 03:43 AM

Rpm jump when shifting (7at)
 
so every time I would shift from 3-4 gear it would up shift. It happens more than it does not. 1-2 is fine and 4-5 happens very rarely. Is it an issue with my shifting or is it the car? Usually upshifts about 500rpm and makes it sound really ugly

GZ3 07-20-2015 08:44 AM

can you explain a little better?

louiey370z 07-20-2015 01:56 PM

Quote:

Originally Posted by GZ3 (Post 3261607)
can you explain a little better?

What part are u not understanding so I can explain better?

Xerodx 07-20-2015 02:19 PM

So like when you shift from 3rd to 4th, the rpms jump?

FPenvy 07-20-2015 02:37 PM

mine does it when going 4th to 5th sometimes. little 200rpm blip up or so.

louiey370z 07-20-2015 02:55 PM

Quote:

Originally Posted by Xerodx (Post 3262030)
So like when you shift from 3rd to 4th, the rpms jump?

Yes then it will go into 4th. Makes the shift sound really bad and ugly

GZ3 07-20-2015 09:41 PM

Almost like it revs twice and catches gear on the second?

louiey370z 07-20-2015 10:01 PM

Quote:

Originally Posted by GZ3 (Post 3262537)
Almost like it revs twice and catches gear on the second?

Yeah it'll like shift up 500rpm and it'll make a sound like its revving but it sounds really bad

GZ3 07-20-2015 10:18 PM

Quote:

Originally Posted by louiey370z (Post 3262547)
Yeah it'll like shift up 500rpm and it'll make a sound like its revving but it sounds really bad

Hmmm sounds similar to my problem minus the sounding terrible part. Im currently awaiting a new transmission from nissan

KN21283 07-20-2015 10:25 PM

My guess is the flex plate. Do you have any rattles when you go from P to D?

FPenvy 07-20-2015 11:23 PM

My revs have jumped from time to time on 4th-5th shifts since I bought my car but no angry sounds or issues. Just a baby throttle blip most likely tcm glitch

louiey370z 07-21-2015 12:38 AM

Quote:

Originally Posted by FPenvy (Post 3262607)
My revs have jumped from time to time on 4th-5th shifts since I bought my car but no angry sounds or issues. Just a baby throttle blip most likely tcm glitch

It's like a little lag sound. It doesn't sound like a bad "clank", but more of a horrible rev and then it like makes the car slower then speeds back up. It's super hard to explain, so I was hoping I wasn't alone.

Btw, no issue from P to D

FPenvy 07-21-2015 07:27 AM

Quote:

Originally Posted by louiey370z (Post 3262618)
It's like a little lag sound. It doesn't sound like a bad "clank", but more of a horrible rev and then it like makes the car slower then speeds back up. It's super hard to explain, so I was hoping I wasn't alone.

Btw, no issue from P to D

mine just has a throttle blip of about 200-300rpm here and there when hard shifting into 5th. doesn't slow down or anything like that if anything it's just a very slight delay in the next gear grabbing maybe.

GZ3 07-21-2015 09:29 AM

id get it checked out JIC, doesnt hurt. My issue was more pronounced and very repeatable.


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