So im going to be flushing the transmission fluid here pretty soon and i have never done it before i would really like to know what i need before i get into it.

Now i did some searching around and i saw EmptyV's frankly excellent post on how to do an auto transmission flush and i know a manual wont have a filter or anything like that.

So my main question, is what type of fluid do i get? I have heard nothing but good things about Royal Purple but when i go searching for what i need, i come across the Max Gear stuff, but then i also see the Syncromax stuff? Now i did some searching for the in the FSM, and it says for a 4X4 Manual needs something called "API GL-4" gear. Which the Max Gear says its compatible with.

So basically i just need to know what to get. lol

And any special tricks at filling it i should know about?

Thanks guys.

-Kyle

Get GL-4 stuff only, not dual rated GL-4 and GL-5 stuff like that Royal Purple Max Gear. Amsoil MTG, Redline MT-90 are excellent choices. Get this drain plug socket set for its 13mm drain plug socket to use for the fill & drain plugs. Open the fill plug first, otherwise if you can't get the fill plug loose after you've got the drain plug out you're pretty much SOL.

Towncivilian wrote:Get GL-4 stuff only, not dual rated GL-4 and GL-5 stuff like that Royal Purple Max Gear. Amsoil MTG, Redline MT-90 are excellent choices. Get this drain plug socket set for its 13mm drain plug socket to use for the fill & drain plugs. Open the fill plug first, otherwise if you can't get the fill plug loose after you've got the drain plug out you're pretty much SOL.

Alright, ill give that a try.

Why not the dual rated stuff? What are there advantages/ disadvantages?

And is the socket set necessary? isn't it just a 1/2 inch drive? pretty much sticking a breaker bar will do the trick right?

Thanks for the reply.

-Kyle

GL-5 gear oils contain additives that can be harmful to yellow metals (brass synchros). When a fluid states that it is GL-4 and GL-5 suitable, it is likely referring to use in a differential, not in a manual transmission.

Try a 1/2" drive breaker bar first, it might come out easy, I'm not sure. I'm just suggesting it because the diff plugs share the same plugs (as far as I know) and I started warping the plug metal after a while of trying to loosen it.

Towncivilian wrote:GL-5 gear oils contain additives that can be harmful to yellow metals (brass synchros). When a fluid states that it is GL-4 and GL-5 suitable, it is likely referring to use in a differential, not in a manual transmission.

Try a 1/2" drive breaker bar first, it might come out easy, I'm not sure. I'm just suggesting it because the diff plugs share the same plugs (as far as I know) and I started warping the plug metal after a while of trying to loosen it.

Hmm okay, ill give those a shot, did some quick googling, any place to find cheaper than 15 a quart, ill have to buy 11 of these right? it says 10.75 on the FSM

Thanks

-Kyle

Towncivilian wrote:
Try a 1/2" drive breaker bar first, it might come out easy, I'm not sure. I'm just suggesting it because the diff plugs share the same plugs (as far as I know) and I started warping the plug metal after a while of trying to loosen it.

And did these socket sets help with that warping problem?

The quantity is specified in PINTS, not quarts! So you need about 5.39 quarts.

I had the Nissan dealer perform the drain & fill and I also supplied new plugs after the metal began to warp, so I can't say I have experience with the 13mm drain plug socket. They've been recommended on NPORA, though.

Towncivilian wrote:The quantity is specified in PINTS, not quarts! So you need about 5.39 quarts.

I had the Nissan dealer perform the drain & fill and I also supplied new plugs after the metal began to warp, so I can't say I have experience with the 13mm drain plug socket. They've been recommended on NPORA, though.

Jeez your right, sorry i have been off today, and i just checked your profile over on NPORA, Your nineteen? I so pictured you as some 40 something year old dude, sitting behind his laptop. lol

Only reason i mention is because im 19 as well.

And drain plugs, did you buy them new or did you just pick them out from the junk yard?

probably want to go new on something like that im assuming?

Thanks

-Kyle

Yep, 19.

I bought new OEM ones (though I probably could have gotten ones from any H223B axle at the junkyard, you're right). You don't need to replace them unless you really disfigure them during removal.

Towncivilian wrote:Yep, 19.

I bought new OEM ones (though I probably could have gotten ones from any H223B axle at the junkyard, you're right). You don't need to replace them unless you really disfigure them during removal.

Nice, thanks for the info.

And even though the Royal Purple says its non corrosive still no go?

http://www.royalpurple.com/product-cate ... #!max-gear

No way in hell I'd run that after seeing how much it corrodes copper (see this study, page 17).

Towncivilian wrote:No way in hell I'd run that after seeing how much it corrodes copper (see this study, page 17).

Wow, okay, now i see what you meant!!

Alright, so of those tested, what would you put in your personal rig? redline, AMSOIL ?

EDIT: Also do you recommend a trans flush like empty V did?

Towncivilian wrote:No way in hell I'd run that after seeing how much it corrodes copper (see this study, page 17).

But could it bias? i mean it was tested by amsoil, who coincidentally was deemed the best oil tested?

IDK, i wish this crap was easier, lol

I'd most likely go with Amsoil simply due to local availability (my local NAPA sells Amsoil products), but I'd have no hesitation to run either one. Both are excellent quality fluids.

Bias is possible, sure, but either way I still wouldn't chance running a dual-rated fluid when GL-4 only is specified in the FSM.

While were at it, do you know what to use for all of the other oils needed in the car?

Like the diffs and transfer case?

The Diffs say use a Nissan LSD Approved GL-5 oil,The FSM says to call the dealer for an approved list. Do you by chance know what that would consist of?

And the transfer case says to use DEXRON, and from what im finding is that Dexron in a standard ATF fulid? so any old ATF will do?

Thanks, sorry for the billion questions.

-Kyle

Everything is explained in this thread. I'd use gear oil in the transfer case; ATF is acceptable, but probably not the best fluid for the application. ATF is used at the factory likely for simplicity's sake.

Towncivilian wrote:Everything is explained in this thread. I'd use gear oil in the transfer case; ATF is acceptable, but probably not the best fluid for the application. ATF is used at the factory likely for simplicity's sake.

Alright sounds good, thanks man, really appreciate the help.

-Kyle

You're quite welcome, good luck!

Towncivilian wrote:Everything is explained in this thread. I'd use gear oil in the transfer case; ATF is acceptable, but probably not the best fluid for the application. ATF is used at the factory likely for simplicity's sake.

Oh and you mentioned not to mixed ATF and GEAR oil for the Transfer Case, why is that? does it become super corrosive?

And it says it comes with ATF, so if i were to change over to the gear oil, how could i be sure to get all of the ATF out? complete rebuild and cleaning?

Thanks

-Kyle

The FSM says not to mix the two.

It does come with ATF. I doubt the small amounts residual ATF left from draining will be a problem - if anything it will just thin the fluid very slightly. If you are really concerned, fill with gear oil, drive around for a few thousand miles, then drain & refill again with gear oil to ensure all ATF is gone.

Towncivilian wrote:The FSM says not to mix the two.

It does come with ATF. I doubt the small amounts residual ATF left from draining will be a problem - if anything it will just thin the fluid very slightly. If you are really concerned, fill with gear oil, drive around for a few thousand miles, then drain & refill again with gear oil to ensure all ATF is gone.

Alright, sounds good i think im just gonna go through and clean everything out, thanks again!!

Oh any suggestions on what to run?

Use whatever gear oil you'll be running in the transmission.

Towncivilian wrote:Use whatever gear oil you'll be running in the transmission.

Oh well that's easy, sweet, thanks again man.

I've got to get you a gift basket or something!

-Kyle