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I have a Nissan Murano 2007 (purchased in 2010) and I am the second owner. The car has lot less mileage on it @ 85Kmiles. I am sorry that I am posting in a Altima forum. The main reason is that the DTS error code I got (P1778) is matching with what other have been receiving in this topic/thread.

The local Nissan service center is recommending the replacement of the CVT

Is there a place where I can get any CVT repair/servicing done (I live on the west Spokane) ?
Any advise is appreciated.
Yes, they love replacing transmissions. Your 2007 Murano might have a previous version of the transmission. I think they might have changed them in 2008. But it is still the same situation.

Your best bet, if you aren't inclined to do the work yourself, is to call the local transmission shops and ask if they work on Nissan CVT transmissions and whether they are able and willing to work on the valve body parts instead of just replacing the whole transmission. The Nissan service centers and almost all transmission shops will want to replace the whole transmission, because it is a nice profit for them. I doubt you'll find one who will just work on the valve body (which doesn't require removing the whole transmission, which is a large part of the cost in labor), but you can try.
 

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thanks for the hack. Saved me at least $2500 on my son's 2011 Altima. Especially the dental floss! Wow!!!! I never would've figured that out. I'm curious....how did you learn that trick?
 

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I can't speak for the original poster, but in my case, I put a toothpick up through a hole that I believe is in the valve body for that very reason (to hold back spring loaded ratio arm), with some fishing line tied to it. Once the valve body was up in place, with that arm locked into the rod sticking down from the transmission, I pulled the toothpick out slowly.
 

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Was there any I-key errors linked to it? I have the 1778 but my speedo with drop to zero while driving and simultaneously the I-key light pops up. I replaced the transmission speed sensor but to change.

What is a good place to get a step motor? I have an 07 2.5
 

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Benzolorenzo1,
This is very helpful. I think I need to replace the stepper motor on my 2008 Nissan Altima 2.5s. A few days ago while driving noticed the car getting stuck in the lower gears. It was revving the RPMs. Then at one point it struggled to take off while at a stop light. I notice the check engine light on. Once I got home I left the car parked for few days, then this morning I went to start the car and all of the electrical would turn on and the car would try an start but then it would just give up after a few tries. It was weird, I put my foot on the brake, pressed the ignition, and it would try starting for a couple of seconds then stop. I plugged in the code machine and have the P1778 code. Any thoughts?
 

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Hey, great write up! I'm having an issue where it feels like my car doesn't "shift" I know CVTs don't have gears, but it feels like I can't get into anything past 1st or 2nd gear. I read the codes and I'm getting the P1778. is this the same issue you were getting?
I replace my stepper motor on my Nissan Altima 2012 and don't move the gear I need to reprogram
 

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Well I replaced the stepper motor along with the entire Valve body. It got even worse! So I was told the tcm needed reprogrammed. So I took it to the dealership, and OF COURSE they said completel transmission failure. How is it failed if I can still drive it (barely)???

I'm getting wierd I-key errors while driving too. I'm wondering if the remote start has started failing, since it has to bypass something to start it with no key?

PS the they want $4250 to replace it
 

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Hey There, just curious about the part you ordered. I am currently having the exact same issue and trying to find the stepper motor aswell. It shows in your link that the 2008 Altima is not a match for this part. I Have a 2008 Altima 2.5s.

Thanks for your help, Cheers
 

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Hey there thanks for taking over replies. My CVT is acting up as described here and I have the same error code P1778 in my 2008 2.5s Altima. I checked the part that was orignally recommended but it doesnt say that it is compatible to the 2008.

Considering junking the Car :(
 

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I'm not sure if Benzolorenzo1 active anymore, but I'll take a stab at some of the comments, as I've been immersed in this for the past couple months.

The stepper motor is tied to a ratio control valve on top of the valve body. In my case, I got code P1778 and the car performed like it was stuck in a high gear. It can get stuck in any gear ratio. I replaced the valve body myself (which includes a new stepper motor) and got past that particular issue (although I had other issues). The ratio control valve was stuck on mine, so it didn't allow the stepper motor to move and do what it needed to do (change the ratio in order to "shift gears").

If your car is stuck in that one ratio and isn't just sometimes getting stuck, then my best guess at solutions are:

A) Take the valve body off and see if it is the motor or the ratio control valve next to it. The valve is spring loaded. If you are able to push the rod for that valve in and have it spring back, then my guess would be that it is the stepper motor and you could just buy that and replace it.

B) If it is the ratio control valve, then I suppose there is a chance you could disassemble it and see if you could get it to move freely. I couldn't find the parts online to replace the parts for the ratio control valve, but if anyone knows of a source, I'd like to have that.

C) You can buy a whole different valve body, which includes the stepper motor and ratio control valve. The reason I did this is because I figured a car with 120K miles probably could benefit from a remanufactured valve body, where the solenoids and other valves had been cleaned and tested and replaced with other parts that were operating at spec.
What did you pay for the valve body assembly and did you install it yourself? Is there any videos on R&R on a CVT Valve Body?
 

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Benzolorenzo1,
This is very helpful. I think I need to replace the stepper motor on my 2008 Nissan Altima 2.5s. A few days ago while driving noticed the car getting stuck in the lower gears. It was revving the RPMs. Then at one point it struggled to take off while at a stop light. I notice the check engine light on. Once I got home I left the car parked for few days, then this morning I went to start the car and all of the electrical would turn on and the car would try an start but then it would just give up after a few tries. It was weird, I put my foot on the brake, pressed the ignition, and it would try starting for a couple of seconds then stop. I plugged in the code machine and have the P1778 code. Any thoughts?
Hey There, just curious where you ended up on this? I am having the exact same issue right now and am on the fence on the attempt to replace the steppor motor or to junk the car?

Cheers
 

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Hey, great write up! I'm having an issue where it feels like my car doesn't "shift" I know CVTs don't have gears, but it feels like I can't get into anything past 1st or 2nd gear. I read the codes and I'm getting the P1778. is this the same issue you were getting?
What did you figure out on this. I'm having the same issue with mine. Not shifting past 2nd year.
 

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About 6 months ago I received the death code P1778 (stepper motor) in my 2008 Altima. I searched far and wide, low and high, only to be told 2 things... you need a new transmission, or you need a new valve body. since I didn't have $2500 for a new trans, let alone $800 for the valve body I decided to look into this a little further. watched a youtube video the only one I could find was a Nissan armada, but thought what the hell. I drained the fluid, dropped the pan, yanked out the valve body, and found that little bastard that gave me such trouble.
I want to thank you for giving this info out. I had a P1778 code on my 2010 Murano, followed your directions and now it runs without the code. Thanks again.
 

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Nice job. What I have found on many occasions is the dealer can get the parts and are full of shit. I have had this happen several times. So what I did was my homework.....I got on line and eventually found the part numbers and went back to the dealership. I tell them, you know that part you do not sell...? Here is the part number. They put the part # in and bang.....there it is.... The baffled GED counter boy has no words.....Other than, I'll order it. I have had this happen on many occasions with TSBs. They can not find it......So I have to go find the number for them......
Hi there
I would like to know the part number for the stepper motor. I am having the same issue with my 2010 Nissan Altima. When I come to a stop and push the gas petal it acts as if it don't want to move. I push gas pedal down further and it eventually goes. Drives like it is suppose to at normal speeds until coming to a stop where it shakes until I come to stop again. Please please help. All the auto parts stores dont know what part Ivam speaking of nor the dealership. Code I got was P1778 with no check engine light on. Part number I found on internet was JF011E REOFIOE FICIA for 53.95. Any help would be great.
 

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Hi there
I would like to know the part number for the stepper motor. I am having the same issue with my 2010 Nissan Altima. When I come to a stop and push the gas petal it acts as if it don't want to move. I push gas pedal down further and it eventually goes. Drives like it is suppose to at normal speeds until coming to a stop where it shakes until I come to stop again. Please please help. All the auto parts stores dont know what part Ivam speaking of nor the dealership. Code I got was P1778 with no check engine light on. Part number I found on internet was JF011E REOFIOE FICIA for 53.95. Any help would be great.

Go on ebay locate stepper motor, then message the seller they can confirm fitment.
 

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Sir, can you PLEASE PLEASE PLEASE
call or text my husband. We are having this issue. My husband, Johnny would love to speak with you. 865-208-0812

thank you!


About 6 months ago I received the death code P1778 (stepper motor) in my 2008 Altima. I searched far and wide, low and high, only to be told 2 things... you need a new transmission, or you need a new valve body. since I didn't have $2500 for a new trans, let alone $800 for the valve body I decided to look into this a little further. watched a youtube video the only one I could find was a Nissan armada, but thought what the hell. I drained the fluid, dropped the pan, yanked out the valve body, and found that little bastard that gave me such trouble.

now with part in hand I went to my local parts store, and told we don't sell that part, its not even in our system... went to the dealership, told the same thing and was told I needed to buy a new transmission as they are not "serviceable" funny but I had the part in hand, how can it be not serviceable?

lastly I took a gamble, I went to ebay, ordered a stepper motor. 20k miles later, still no code, no whine, and no lock up. here is how I saved thousands and bought a $35 part.

1)drain fluid.
2)drop pan (clean with brake cleaner)
3)remove the 3 bolts holding filter. (clean with brake cleaner while your at it)
4)remove the valve body about 11 bolts
5)remove the stepper motor from the top of the valvebody (the side you can't see with the pan off) 2 bolts
6)replace with the new stepper motor found here JF011E RE0F10E F1CJA Transmission CVT Stepper Motor For SENTRAN Nissan Dodge | eBay
7)take a piece of dental floss about a foot long and hold the spring loaded arm back against the stepper motor and return the valve body back to the transmission.
8)after you have a few bolts in place remove the floss before you tighten all the way.
9)reconnect trans filter and bolt back into place.
10)rejoin the fluid pan to the transmission and replace with quality cvt fluid. Amsoil makes a great product.

I hope this helps and if you have questions please feel free to ask.
 

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JX35 Infiniti owner here... My OBDII code on my JX35 produced an error code suggesting the stepper could be faulty (P1778) and another saying transmission pressure was low (P0746) and the pressure control solenoid might be faulty.

My driving symptom was simply press down the accelerator to the floor, the engine doesn't rev up, the car doesn't move. Initially, it just didn't move QUICKLY. It would eventually get up to about a 15 or 20 MPH speed, then would take off and go like normal until the vehicle stopped again, then the process would repeat. Now, it just doesn't seem to move at all.

Does this symptom sound related to the stepper or solenoid to those in the know? I checked other forums more specific to Infiniti owners but this one seemed to have the most chatter about the problem, so I chose to post here.

Thanks,
John
 

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BTW.... If anyone knows the part number of the stepper for this transmission (identified as transaxle 310C0-3WX0E from Nissan/Infiniti), I would greatly appreciate knowing it. Having a hard time figuring it out online.
 
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