What's the drawback if fluid is a bit overfilled? Not so much, just a little bit. Could be achieved by slightly less than perfect level and/or lower end of temp.

 

You would need to over fill it by more than 2 quarts for it to really mess something up. The system is drenched in fluid so everything gets touched with fluid. The flange is always under oil even at stock height which is why gasket design improved to help any leaks or issues with this.
Next would be seal stress, either the front or rear seal will start having a tougher job due to not enough oil drainage.
A bit extra will be better than under at any moment, you can be easily under or over. I installed \a transmission that had oil in the pan but took a total of 10-11 quarts for full fill which mean it was almost completely dry.

 

Not so much, just a little bit is relative but to answer your question, nothing.

 

Well, probably a bummer to have to say this being kind of an advocate of the improvements. I recently installed a flashed ECM and though my shifting pressures have increased and from the sporty aspect the car is a night and day difference, the drawback is that upon making more power you'll notice this issue a bit more.
To be precise it happens on D at it's highest gear, trying to drop a gear on pedal position alone it take an average of 2 seconds, doesn't seem like much but upon installing aftermarket components this initial delay will sound bad, like a kia/prius with a cold air. It feels like converter lags at disengaging and it needs to disengage prior to kick down.

 

Slightly over filled is tolerable & preferable to being underfilled . It was said earlier... +or- a half court wont matter .....That's not the case . At minus a half court (16oz) you are dropping the level in the pan significantly when at checking temperature. The fill hole/stem that goes above the level of the gasket when the pan is installed is exactly 5/16ths taller than the pan lip, the fluid will start to trickle out when it reaches checking temperature and exceeds the 5/16ths of a inch stem fill hole height above the pan and more precisely (11/32nds to 3/8ths) higher than gasket level ......

The deepest part of the stock pan is only 1.75 inches tall (The section by the magnets) and at both the front and back of the pan that depth shrinks to 1.25 inches deep or shallower . The filter is submerged in fluid ...it needs to stay that way otherwise the pressure that builds when the mouth (The screen part) is not submerged or due to movement and a lower than recommended level was achieved when filled will cause the screen n at times to become not submerged, inhibiting steady flow of the Transmission fluid (Like sipping on a soda through a straw that is not submerged entirely the pressure needed to get fluid up the straw greatly increases)

16 oz short in the tranny at operating temperature can lower the fluid level by nearly a quarter inch below the pan gasket of the pan, the screen that sucks the fluid up does not extend into the pan all that much further. .

Bottom line...get it right or at worst error on the side of slightly over filled

 

court lol...

 

Kind of sad that after all of the important info and research that I took from that comment what you seem to remember is a grammar error.
Your comment adds nothing to this thread.

 

It's amazing .....You have a guy in M3clubracer spewing misinformation about the transmission being underfilled and it being acceptable & when you crap on his take with facts that he does not dispute, he instead turns into the Spelling ****

I use a speech to text program that is not predictive and that is sound based, with a heavy NY accent... Quart is always interpreted as Court as is Sure as Shore . Sometimes I bother to check, on a message board mostly not.

 

Little thin skinned for a yorker much? Misinformation? Where? Perhaps you should read back in the thread...

Edit...so you used dictation? I call BS as you obviously are either a god among gods who can dictate dots (even misplaced periods), parenthese, and carriage returns with ease or you are trying your best to back out of the fact that you didn't have a clue difference between court and quart. It wouldn't be the first time I've seen someone use dictation as the excuse for not knowing eNgLisH. Did dictation "capitalize spelling" for you too? If I'm going to be called out for being a ****, perhaps I should be one. ;-) Look man, own it.

 

I talk to text reply on this thread while at stop lights to help the community when they need the help so my grammar will be all over the place sometimes. Though at times the grammar police is needed in certain threads, this one is solely meant to help folks figure out issues with the 7at since many go through this. It's quite fascinating discovering a helpful thread where you get helpful information. Now with your comment you have shun the spotlight on yourself sir, what you're trying to do is justify that childish behavior by picking on the things you dont agree in hope to deter the attention to something else. You've been here since 2015 so you probably went through some of this bullying yourself and now it's your time.

I speak and write 3 languages, it's greatly appreciated when you can let that peeve slide and understand what they were trying to say. Be nice

 

What a tool. I used a speak to text program and can dictate dots all day......... and can capitalize spelling at will . Perhaps if you want to play the Spelling **** role you shouldn't misspell words like "parenthese" in the process of playing the role of Spelling **** ....it's moronic to do so.

Telling anyone that being 16 oz shy in the tranny is acceptable.... is misinformation. as you did here

 

All,

For reference below are the quantities and OEM part numbers for the replacement parts. My car is very rusty so I plan to buy most of the parts just in case. Although I will buy 12 transmission pan bolts instead of 24 as I'm sure at least half should be re-usable hopefully. It took me over an hour to find this information as the diagrams on the official Infiniti parts site was not clear:

1x Transmission Oil Pan Gasket: 31397-1XJ0A (31390)
1x Fill Plug: 31361-1XJ0A (31120A)
1x Drain Plug: 31377-31X06 (31390A)
1x Drain Plug Washer: 11026-JA00A (31394E) (Same one used for the oil drain plug)
24x Transmission Oil Pan Bolts: 31377-41X60 (31390AA)

Hopefully this is helpful for others.

Did anyone ever end up finding the transmission filter part number or did we agree to just leave it be?

 

I would say let it be. You can inspect the mouth of it while you're there and if it looks dirty some brake/carb cleaner will have it looking new again.
Since your car is rusted I would say a couple of days prior spray penetrant throughout this whole area. You'll be glad you did come D-day.

 

I have a 5AT and I could never find the filter for sale. I was able to remove the filter though, and clean it out. It's just a mesh filter.

 

Thanks BULL, m3clubracer and KEVON1! I'll probably err on the side of more fluid when refilling. 120k, and I recently started noticing the transmission start slipping, so probably this was never done. I don't plan on dropping the pan as there might be rust induced complications. Will see how it goes after the fluid is changed out. Vavoline looks to still be the best choice; the Transmax Castro I was using for PS changes does not appear to be compatible.

This forum has been very informative and I'm grateful to have such a wealth of information available. Was recently dumping out my old waste PS fluid accumulated over the years and could see it go from dirty red/brown to clear red. Pumping from reservoir's an easy DIY.