2012 rogue p0746

[Jrcash1010]

Not sure where to post this, hope it is in the right place. I bought a rogue with p0746. I ordered a refurbished valve body. They sent me one wired for a dodge. I took the solenoid and put it on my old valve body. Both solenoids operated and passed bench test. Still had the code. Replaced both speed sensors, paper filter and filter in the pan. Checked all wiring on the body, checked wiring from cvt plug to tcm. I used the same rom on the original valve body. Got a better scanner than just the basic reader I had. The tcm wasnt connecting to it so I go a new tcm. It is programmed and I am still getting the code. Bench tested all other components on the valve body and they are good. Checked cooler and lines. They are not clogged. Could it be the original valve body that I had to reuse or just chalk it up to a bad transmission and put it back on market place and count what I put into it as a loss? I didnt pay much for it, but once you add the tow to the house, the new battery, getting a surity bond on it and then paying to retitle it in my name on top of the parts I bought. I am going to loose on it selling as is. But at this point I dont think it will be cost efficient to have a transmission installed. I wouldn’t be able to do that work not having the proper tools. Thanks for your time reading this.

[Jrcash1010]

I didn’t add this, when you clear the code it comes right back without starting the engine.

[VStar650CL]

P0746 isn't a bad solenoid, it's a performance code which almost certainly means your belt is slipping. In your case it may also mean a bad front pump. See this post:
viewtopic.php?t=635005

[Jrcash1010]

Thank you for the reply, the pump is operating. Live readings on the scanner show it operating. But it may not be operating correctly. When I had the pan down I was still in the process of learning about the cvt’s. I just looked at the belt from the view with ghe valve body out. It looked good but now I know that isnt the side that gets the wear. So now I need to take everything back down and use my scope to check the other side that I can’t see. It is a car that I bought for 300 dollars. The paint is fading, it is a 2012 rogue with 190,000 miles on it. The plan was to fix and resell. Is it even worth it to put a new transmission in and try to sell or just scrap it out, wash my hands with it and consider it lesson learned?

[VStar650CL]

Assuming it's blown, if you can get a good used one with the TCM included for the right price, it might be worth it. But like I told the OP in that other thread, if there's belt damage or pump damage then it's toast, don't try to fix it. They don't make rebuild kits for the '10A's like they do for the '10D's.

If you do go used, getting the donor TCM along with the donor tran-ny is key. Hook it to the recipient before installing anything else and see if it has codes. If it does, take the whole shebang back to the JY and try again. If it doesn't, then having the TCM will also save you needing to reprogram the IP values once the new unit is installed.

[Jrcash1010]

Oh man, I forgot to add that the tcm in the vehicle wasn’t being read by my scanner. I ordered a used one off of ebay, it reads that one. I have it matched with the vin number of my rogue. But the tcm that was in the rogue couldn’t be read. This new one is matched with the vehicle but the code still pulls. It shows the pump working along with solenoids getting power and the speed sensors working. But it has one thing in red. It is lu prs -58.47.

[VStar650CL]

That's the lockup clutch and shouldn't affect the ratio, and it will be low anyway when the TC is unlocked. P0746 is a ratio discrepancy, so they don't really explain one another. The new TCM won't have the right IP's, you should really fix that before assuming anything. If you have CVTz50, follow the instructions in the FSM but where it says to press "Erase" in the Consult, instead press and hold the "CVT Info" button.

[Jrcash1010]

Thank you, other than the p0746 there are two codes for the 02 sensor. I haven’t corrected that yet because if I can't get it moving, there is no sense in replacing the 02 sensor. But there is one more, a u1000 for the throttle position sensor. I don’t think that would pull p0746, but at this point it doesn’t hurt to ask. Would it?

[VStar650CL]

The TPS isn't active on the CANbus, it's a "dumb" adjunct to the ECM and can't possibly generate a U1000. That has to be something your scanner is misinterpreting.

[Jrcash1010]

Ok thank you, my son in law and I are going to get out there this weekend and program the tcm the way you explained and see if that changes anything. Thank hou for the help!

[VStar650CL]

HAPPY BIRTHDAY AMERICA!
Happy 4th, everyone!

[Jrcash1010]

Happy 4th to you as well!

[Jrcash1010]

Checked all electrical. Powered solenoid a and b up with a powerbox. You can hear both of them working flawlessy inside the transmission pan. It isn’t an electrical problem. It is a fluid pressure problem. Like you said, either the pump, seals or the body itself isnt holding pressure anymore. Another note, from fiddling with electrical, I must not have seated either the cvt plug or tcm plug well. I tried the old tcm once more on the scanner and made sure connectors were in securely and my scanner picked up the original tcm after I did that.

[VStar650CL]

Nine times in ten, P0746 on a car that age means a slipping belt. Pull the VB and take a look, if it's scored then you'll save yourself anymore screwing around trying to save the unsavable.

[Jrcash1010]

Ok, to make sure I am right. I have to run my endoscope in to see the other side correct. Because the side that is visual after valve body removal isnt the side that get the wear.

[VStar650CL]

Correct, you're looking for the beveled area where the belt and pulley contact one another.

[Jrcash1010]

Cleaning the throttle body made it to where it will move now. Popping and vibration at the trans axle and front tires shake. So I am sure both the trans axle and transmission is toast.

[VStar650CL]

It's all one unit on the tran-sverse 4-bangers, gearbox and tran-ny are unitized. The only thing bolted on is the tran-sfer case for AWD, so a blown final gear is the same as a blown tran-ny. However, popping isn't normal even for a blown gearbox, whining and clattering are more characteristic. Popping may mean you have problems with the CV's or bearings too, or if it's AWD maybe the driveshaft or coupler.

[Jrcash1010]

Thank you for that info, my son in law and I planned next weekend to go ahead and tear into the front end and look at everything. He mentioned he wants to do an inspection on the cv’s. Also, when we put it in reverse, you have to get it to 2000 or more rpm’s before it engages and goes in reverse. It does the same as in drive with the tires shaking and the popping. It is like it tries to move then once it does the tires lockup causing the popping. Then they release again, I wish I knew how to add video because I would add the one I took of it moving in forward and reverse.

[Jrcash1010]

It’s not awd

[Jrcash1010]

But cv’s won’t cause p0746 will it? So I still have to figure that problem out if it is the cv’s and/or bearings correct? Btw thank you far all of this knowledge you are pouring into me. It very much is appreciated!

[VStar650CL]

Oh, now I get what you're saying. That's the pressure coming up as you rev it, then the belt tries to engage but judders instead of moving the car. That's the tran-ny, not the gearbox. My guess is if you inspect that belt, it will look just like that '09B in the other post.

[Jrcash1010]

Yeah that is what it actually feels like too. The shaking and shuttering feels like it is from below in the transmission, not the cv’s. But now we know, there is no more guessing. With me, there is no sense in getting a new one installed. I don’t have anywhere to go to and get one at a decent price nor do I have the tooling to remove and install and make money on it. Going to try and sell as is, maybe someone else out there has the tooling to get it done cheaper and resell. Thanks for all your time!

[VStar650CL]