Awd cvt transmission howl,what would quite it? We want to trade it back to the Ford dealer who sold it to us!

a Generation 4 car.with CVT transmissions (horrors)
manufactured here. but how speaks English there?
2010-2016 (Japan)
2012-2019 (Indonesia)
2014-2018 (Malaysia)
no year told car. wow.! 2010- to 2018 made
not one Serena sold in USA so no books here .
nor for this.
Nissan Serena C26 S-HYBRID real name is this
you forgot the HYBRID fact.?
well NO VIN told no engine told no county told nor if car is 4wd or what transmission is there (shows CVT)
we can not guess cars. and they are not the same all over earth.
VSS speed sensors (veh.speed sensor)

• so did scans of PCM show this error?? not told
• or some dweeb on the internet said find it.?
• or the speedometer went dead?
• transmission stopped up-shifting?

Generic answers.
some cars have 5 to 8 vss sensors
3 in transmission and 4 for ABS brakes.
my car uses ONLY ABS for speed. simple as that.
some cars the 1 VSS is on tail shaft of transmission
or on tail shaft of AWD box.
see?
no car told end hunt. vss.

that;s easy
first ID what trans is there, of many. , seen on WIKI.
FWD or AWD ? not told
it is inside the box. and if you learned what transmission it is there.
GEN6-1/2 203 face lift. but
3.5 EcoBoost V6
2.0L EcoBoost Inline 4

the trans matches engine max torque output. so learn that then tell what is under the hood (and box and fwd/AWD)
why try to fix car, and not know what is under the hood
I can't guess what you own lacking VIN
even the dealer demands a VIN, for good reasons. PARTS
best guess me at ford.com is this 6speed box post 2012
so google parts for this and learn. easy. once learn what it is.......
6F55
your are asking how to build or repair a valve body?
seems no parts for the VB are sold..

they sells this and a zip kit

https://www.transmissionpartsdistributors.com/6f50-6f55-transmission-solenoid-assembly-original-equipment-fits-07-ford-aa5z-7z369b/

learn task actual transmission parts houses for parts
to see first what is sold or not
the service manual covers this.

I don't know about Nissan but my 2006 Ford Freestyle AWD CVT transmission was a high pressure sealed system requiring a special pumping machine to change the fluid. It didn't even have a dip stick. Does yours have a dip stick? If not, I suspect that you'll be in a similar boat. My Ford had to have the engine and transmission partly removed from the car to replace the high pressure fluid filter. Cost? $500.00 U.S. at the Ford dealer. No other shop would touch it. Good luck.

Most newer cars have a built in rev limiter that will not let the engine rev past a set point while in neutral.

This seems to be an electrical issue with that make and model , Ford hasn't come out and said it yet , But My Brother in law is a ford mechanic and he told me that they have many 500's coming in with this same issue , The dealer can test the DEM, ( differential electronic module) it will probably throw a code of p1889, which you should ignore they will say its a oil pump pressure problem and that won't fix your problem , what your going to hear over time is that the CVT (Continuously Variable Transmission) is to blame, but as I said, and whats being reported to me in the news and by fellow car buddies, is that its an electrical issue that Ford has yet to admit to,, so good Luck , Maybe your dealer is better knowledge'd than mine here, I sure hope so, there are many forums concerning this issue, and you can find lots of them on line, just google awd malfunction and check some of them out

depending on your mileage nissan recently extended the warranty on all cvt transmisions to ten years 120,000 miles .contact your local nissan dealer or call 1800nissan1.

have 05 freestyle trouble code p2106 came up dealer said it was eletronic throttle body what is this part

The manual has a mis print, according to MINI the correct oil to use is ESSO CVT Z2L 799 fluid and there are no other manufacturers that use it so sorry but you will have to buy it from the main dealer.

When you say "no throttle response," do you mean that the engine reacted to the throttle but the car wouldn't move?  If so, this is a fairly common issue with CVT cars....CVT is not quite ready for the road yet.