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Jake
Jake, Nissan Technician
Category: Nissan
Satisfied Customers: 4001
Experience:  Experienced collision repair technician, Pulaski Tech graduate and DSM hobbyist.
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Cvt wnt shift into overdrive on hot days or when the wind is

Customer Question

cvt wnt shift into overdrive on hot days or when the wind is blowing. shut it off for a half hour and shifts fine again till it get about 50 miles and does it again
JA: How old is the transmission? Have you noticed any leaking?
Customer: no leaking
JA: What is the model of your '50 Nissan?
Customer: murano
JA: Are you fixing your Murano yourself? What have you tried so far?
Customer: nothing as of yet
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 3 months ago.
Category: Nissan
Expert:  Jake replied 3 months ago.
Hey there thanks for the question
Expert:  Jake replied 3 months ago.
What year model Murano is this?
Customer: replied 3 months ago.
2003
Expert:  Jake replied 3 months ago.
Thank you, ***** ***** ever changed the CVT fluid?
Customer: replied 3 months ago.
We have only had it a year. But no and it looks very clean
Expert:  Jake replied 3 months ago.
Are you saying the CVT fluid looks clean? Or the vehicle?The fact that it only whines after extended driving tells transmission heat is playing an issue. If the fluid is under or overfillied or old it can cause problems as the transmission warms up.
Customer: replied 3 months ago.
Cvt fluid looks clean
Expert:  Jake replied 3 months ago.
CVT whine doesn't have a simple fix in most cases. It only tends to progress and get worse over time. if it's not fluid related you can almost guarantee it's internal to the CVT and require inspection upon removal.
Customer: replied 3 months ago.
Could a sensor cause this
Expert:  Jake replied 3 months ago.

no, a sensor will not cause CVT whine.

It's usually related to the belt or drum.

Customer: replied 3 months ago.
It doesn't whine just won't shift into overdrive when hot out or wind blowing
Expert:  Jake replied 3 months ago.

I must have misread the original question then some how sorry.

Expert:  Jake replied 3 months ago.

The 2003 year model is one of the few year models that had an external speed sensor if i recall off memory. let me check. brb

Customer: replied 3 months ago.
Ty
Expert:  Jake replied 3 months ago.

yes the 2003 model has the secondary speed sensor that is replaceable. all the others are internal to the CVT which is normal on all newer CVT's, but this one at least has teh secondary speed sensor that is replaceable externally.

Expert:  Jake replied 3 months ago.

generally when the secondary seed sensor fails the pulley ratios are off or delayed. The CVT doesn't really "shift" but it uses pressure to effect the ratio of the belt by moving the pulley. this is what feels is like a shifting.

Expert:  Jake replied 3 months ago.

the secondary speed sensor "could" cause your problem yes, but it's not guaranteed obviously. Especially if you don't have a fault code for it. Definately a good place to start though, because your other options aren't very good really.

Customer: replied 3 months ago.
Do u know what it is called and where it is located
Expert:  Jake replied 3 months ago.

the sensor is located on the top of the transmission a couple inches in front of the transmission vent tube.

Expert:  Jake replied 3 months ago.

it is called "secondary speed sensor"

Expert:  Jake replied 3 months ago.

if you need anything else let me know.

if not just be sure to leave a kind rating is all.

thanks.

Customer: replied 3 months ago.
I may have more questions in a few days
Expert:  Jake replied 3 months ago.

that's fine, once you leave a rating I can keep the question open for 7 days.

if you need help after that i can offer you an email exchange.

Customer: replied 3 months ago.
K ty
Expert:  Jake replied 3 months ago.
Your welcome