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Old 04-20-2011, 03:20 PM   Thread Starter #1
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Default Uninstalling & Installing New Valve Body

Installation of new OEM valve body.

Lift the front end of the car about two feet, high enough for you to get underneath and have
easy access. I used ramps. Please make sure car is lifted safely so there's no serious injuries.

Drain oil from transmission, use allan key to remove plug
Click the image to open in full size.

Remove battery & battery plate. You will be able to see the upper bolts.
Click the image to open in full size.

Also remove this bracket.
Click the image to open in full size.

Now you are ready to start unbolting cover, but first spray Torx bolts with WD40, wait a few minutes before loosen them. The manual tells you not to reuse them,
well let me tell you they cost $8 each at Nissan, I reused them. I cleaned them up with wire brush and break fluid cleaner.
Tip: A couple of the bottom ones were a little more worn from the weather, so when reinstalling put them on top.
Click the image to open in full size.


From the picture below remove suction cover bolts first. (this cover has a gasket that's very brittle, it will most likely brake if you try to handle it. Tip have a new one on hand when reinstalling).
Click the image to open in full size.

I strongly recommend having a second person working with you, one can be underneath the car and the other on top.
I had more then one person working with me so we chose to unbolt first then to disconnect wires, if you are by yourself then I would recommend disconnecting before unbolting them just like on the service manual.
From underneath take out bottom and center bolts first, then from the top take out upper bolts, be sure to hold on to valve. You will notice they are not to tight,
remember this when reinstalling not to over tighten them, if you have a tork wrench better for you. I didn't have one so i just used same pressure to tighten them.
Once you pull the valve out, two small washers will either fall off or stay behind. from my photo one fell right away and the other eventually fell off also. these two washers were in excellent condition, so i reused them. In order for these two washers to stay up use vasoline when you reinstalling new valve body.
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Here you will start to disconnect all the wires from the selonoids, the S1 - S5 were easy to disconnect, but the PS1 - PS3 were a pain to disconnect.
All the connectors are color coded and measure to length. when you reconnect them it's hard to make a mistake.
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Remove bolt from sensor.
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Installing new valve;
Place two washers with a bit of vasoline on them back first, then
while holding control valve assembly, connect the parking lock rod sub assembly to manual valve lever sub assembly. Then make sure you put the right bolts were they belong,
(what I did was, as I took one out I placed them on a towel picturing the valve, this made it easy to reinstall in order).
Don't over tight them, remember how they felt when you took them out.
Connect all the wires, again they are color coded and measured to length, but be carefull ok. Make sure they are all connected.


Follow these instructions to put cover back.
Click the image to open in full size.

wait an 1 hr for RTV silicone to cure before putting new oil.
I lost 3 1/2 qts of matic k oil, so i replaced 3 1/2 qts of new matic k oil.
check for leaks, tighten accordandly.

Good luck.
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Old 04-20-2011, 03:22 PM   #2
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Default Re: Uninstalling & installing new Valve Body

whats the verdict on the new valve body ?

was it a OEM or Level 10 ?
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Old 04-20-2011, 03:28 PM   Thread Starter #3
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Default Re: Uninstalling & installing new Valve Body

Originally Posted by NiZMo1o1 View Post
whats the verdict on the new valve body ?

was it a OEM or Level 10 ?
I replace it with a new oem.

Comments
  
  excellent!
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Old 04-20-2011, 03:43 PM   #4
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Default Re: Uninstalling & installing new Valve Body

What does that do???
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Old 04-20-2011, 03:48 PM   #5
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Default Re: Uninstalling & installing new Valve Body

Originally Posted by scrui View Post
I replace it with a new oem.
ok so whats the verdict , I assume you need to break it in ? 500 miles ?

did you replace back it with K-matic OE or went with Aftermarket Fluids ?

is it too soon to feel any difference ?
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Old 04-20-2011, 08:46 PM   Thread Starter #6
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Default Re: Uninstalling & installing new Valve Body

Originally Posted by NiZMo1o1 View Post
ok so whats the verdict , I assume you need to break it in ? 500 miles ?

did you replace back it with K-matic OE or went with Aftermarket Fluids ?

is it too soon to feel any difference ?
I felt the difference right away, my transmission nows shifts like butter and the acceleration is stronger. I drove it for about 50 miles already, I don't have any more jerking, banging, or hard shifts. I replaced with matic k, never use any after market fluids
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Old 04-29-2011, 08:12 PM   #7
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Default Re: Uninstalling & Installing New Valve Body

Great write-up and congrats on the install. Subscribed.
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Old 04-29-2011, 08:45 PM   #8
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Old 04-29-2011, 09:37 PM   Thread Starter #9
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Default Re: Uninstalling & Installing New Valve Body

Thank you. I just trying to do my share. I got some good info from this site and wanted to give some back. I hope this will help anyone who is thinking of doing it themselves.
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Old 04-29-2011, 11:40 PM   #10
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Default Re: Uninstalling & Installing New Valve Body

GREAT INFO!!!! REPPED!!!!
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Old 05-01-2011, 09:56 AM   #11
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Default Re: Uninstalling & Installing New Valve Body

Great info man.
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Old 05-22-2011, 07:12 PM   #12
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Default Re: Uninstalling & Installing New Valve Body

Great Info Champ!!! Good job on the self install...
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Old 06-03-2011, 02:18 PM   #13
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Default Re: Uninstalling & Installing New Valve Body

Ok, I'm starting to feel the slam in reverse and rev to first. Is this new valve body a revised design or is it just a new replacement? What's the point of using the same exact vb when this will eventually happen if it's the same design?
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Old 06-03-2011, 04:30 PM   #14
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Default Re: Uninstalling & Installing New Valve Body

Originally Posted by KDuniverse View Post
Ok, I'm starting to feel the slam in reverse and rev to first. Is this new valve body a revised design or is it just a new replacement? What's the point of using the same exact vb when this will eventually happen if it's the same design?
If I remember correctly, these valve bodies coming out now have been tweaked/altered a little to get rid of the previous design flaw. I can't remember where I read it, but I'm pretty sure the new ones are definitely improved over the original ones.
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Old 06-03-2011, 07:27 PM   #15
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Default Re: Uninstalling & Installing New Valve Body

Nice write up
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Old 06-04-2011, 03:49 PM   #16
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Default Re: Uninstalling & Installing New Valve Body

Great, thank you



Originally Posted by Chemax View Post
If I remember correctly, these valve bodies coming out now have been tweaked/altered a little to get rid of the previous design flaw. I can't remember where I read it, but I'm pretty sure the new ones are definitely improved over the original ones.
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Old 06-23-2011, 06:09 AM   #17
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Default Re: Uninstalling & Installing New Valve Body

Good info..
Question - appreciate if anyone can help

I have 2-3 shifting problem with my 2004 5spd max. again only in 2-3 ans only when its cold..once its warm up, everything is fine. So should not be mounts issue, still checked and verified. Tranny fluid replaced.
CAM sensor, Crankshaft sensore replaced.
ECM/TCM upgrades were also done as per a TSB.

Still the same. As a workaround I let it warm in the morning for few mins and drive. Also, shifting from P to D or P to R or R to D - no issues..smooth and fast.

One nissan tech said - this could be a sticky valve body. Do you guys think so ? In that case is that level10 fix going to work. Also how about Transgo kit ?
Sorry too many questions.

FYI : In the morning, when I use triptonic to shift manually, I observed shifting from 1-2, 3-4 and 4-5 happens fine. For 2-3, I move the stick to +, but it seems it takes a little time to finally shift and appear 3 in the dashboard -ofcourse with a small jerk. I tried shifting 2-3 in many rpm ranges starting from 2000 till 3500, same thing.
But once the car warms up, the shift happens fast. Even I feel faster shifting for all the gears including 1-2,3-4 etc..I just mentioned if this makes some sense.
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Old 06-23-2011, 05:49 PM   Thread Starter #18
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Default Re: Uninstalling & Installing New Valve Body

Originally Posted by ifti View Post
Good info..
Question - appreciate if anyone can help

I have 2-3 shifting problem with my 2004 5spd max. again only in 2-3 ans only when its cold..once its warm up, everything is fine. So should not be mounts issue, still checked and verified. Tranny fluid replaced.
CAM sensor, Crankshaft sensore replaced.
ECM/TCM upgrades were also done as per a TSB.

Still the same. As a workaround I let it warm in the morning for few mins and drive. Also, shifting from P to D or P to R or R to D - no issues..smooth and fast.

One nissan tech said - this could be a sticky valve body. Do you guys think so ? In that case is that level10 fix going to work. Also how about Transgo kit ?
Sorry too many questions.

FYI : In the morning, when I use triptonic to shift manually, I observed shifting from 1-2, 3-4 and 4-5 happens fine. For 2-3, I move the stick to +, but it seems it takes a little time to finally shift and appear 3 in the dashboard -ofcourse with a small jerk. I tried shifting 2-3 in many rpm ranges starting from 2000 till 3500, same thing.
But once the car warms up, the shift happens fast. Even I feel faster shifting for all the gears including 1-2,3-4 etc..I just mentioned if this makes some sense.
You are having the typical signs of a sticky Valve Body 2nd-3rd and vice-versa hard shifts like I did and many others. Changing the valve body is the best option. You can go with levelten or Transgo kit also. I personally went with a new version of valve body from Nissan that addresses the issue. The instructions above show you how to do the change yourself and save you up to $450. You can get a new valve from Nissan for around $850 - $1,100 or go to Courtesyparts.com, they sell them for $844 flat. ( best deal ).

see your PM.
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Old 06-23-2011, 08:34 PM   #19
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Default Re: Uninstalling & Installing New Valve Body

Thank You. Yes, probably thats the route I am going to go .
But I am not too familier with this automatic transmission. So I will search for some org members or any local mechanic.
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Old 06-24-2011, 02:07 AM   #20
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Default Re: Uninstalling & Installing New Valve Body

Nice! I was just talkin to kidd4l about this last week. Nice right up, how much did this cost?
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Old 09-20-2011, 12:58 AM   #21
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Default Re: Uninstalling & Installing New Valve Body

I am having the same transmission issues except my code is PO780. I called courtesynissan.com to price a transmission and the told me it is $1,800. Might the valve body replacement be a possible solution? Thanks for your input!
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Old 09-20-2011, 10:15 AM   Thread Starter #22
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Default Re: Uninstalling & Installing New Valve Body

Originally Posted by national06 View Post
I am having the same transmission issues except my code is PO780. I called courtesynissan.com to price a transmission and the told me it is $1,800. Might the valve body replacement be a possible solution? Thanks for your input!
I'm not sure about the code.
What are you experiencing and for how long ?
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Old 09-20-2011, 12:38 PM   #23
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Default Re: Uninstalling & Installing New Valve Body

To be honest I have been experiencing it for about a year ever so slighty but it got worst within the past few weeks and allowed the check engine light to come on. Just came back from my mechanic and we agreed I will just go with changing the valve body, transmission gasket, tranmission filter and get a shift solenoid pack. The tranmission is still fine the fuild is in good quality and no metal shavings are present. One question though is that he thinks I do not need to change the engine mounts which can be damaged as a result of the shock shifting. Do you think I should change the mounts are just go ahead with the valve body? Also, should I have the transmission mount changed included in the job? Thanks
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Old 09-20-2011, 12:49 PM   Thread Starter #24
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Default Re: Uninstalling & Installing New Valve Body

Originally Posted by national06 View Post
To be honest I have been experiencing it for about a year ever so slighty but it got worst within the past few weeks and allowed the check engine light to come on. Just came back from my mechanic and we agreed I will just go with changing the valve body, transmission gasket, tranmission filter and get a shift solenoid pack. The tranmission is still fine the fuild is in good quality and no metal shavings are present. One question though is that he thinks I do not need to change the engine mounts which can be damaged as a result of the shock shifting. Do you think I should change the mounts are just go ahead with the valve body? Also, should I have the transmission mount changed included in the job? Thanks
I would just follow your mechanics advise, looks like he's not out to take your money. I would just go witht the valve first.
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Old 09-20-2011, 01:12 PM   #25
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Default Re: Uninstalling & Installing New Valve Body

Originally Posted by national06 View Post
I am having the same transmission issues except my code is PO780. I called courtesynissan.com to price a transmission and the told me it is $1,800. Might the valve body replacement be a possible solution? Thanks for your input!
Easy solution pal. I had the same code P0780 (just about the time Scrui was changing his VB earlier in the year). Ordered and installed a new oem Nissan VB and the tranny is back new. Now, in April this year Nissan published a TSB (NTB11-035) titled "2004 2006 MAXIMA; 5-SPEED A/T SHIFT ISSUES. It says if you have "any one or more of the following DTCs stored in ENGINE or TRANSMISSION: P0731 through P0736 P0780" the ultimate solution is "Replace the control valve assembly (valve body)."
I got the VB at Courtesy Parts, $844. What do you think?
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