Here’s a look inside a Nissan Continuously variable transmission and how it works!
Nissan CVT’s are notorious for failure, with multiple warranty claims, recalls and lawsuits supporting there was design and manufacturing negligence when bringing it to mass market vehicles.
The transmission torn down in this video was from a 2012 Nissan Altima with 160,000km. It suffered from the variator pins shearing from the shaft and piston seal damage. This would cause the transmission to slip, as the variator can no longer hold pressure against the CVT belt. A lot of debris and metallic paste was found throughout the transmission.
Further failure points on Nissan CVT’s are belt failure, forward and reverse clutch failure, oil pumps, and valve body server motors. By far the most common is an overheating transmission due to an under-designed cooling system. It is recommended to add an external transmission cooler and change the fluid frequently to extend the CVT life.
Skip to section in the video:
0:00 Introduction
0:39 Teardown
4:33 How a CVT Works
7:23 Failure modes
16:01 Valve body
18:26 Conclusion
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