[Direland]

Hey guys, I'll be changing the front diff this weekend and I bought 75w90 gear oil. The picture is below. Is this the correct oil? Does the limited slip make a difference?

 

[dreep]

What model year? You have posted in the 2016 (2nd Gen) forum, so I'll assume you have a Gen 2 for the moment.

Spec'ed fluid for 2016 XDs is 75W-90 Nissan Differential Oil Hypoid Super-CT Synthetic GL5 for the front diff, so in that case, no, that's not the right stuff. They caution not to substitute or possibly void warranty. I'm not sure what's up with that, but the Service Manual makes that point a couple times. Rear diff is spec'ed more generically as API GL5 Synthetic 75W-90. Still not the right stuff you have, since it's not a synthetic fluid. Check your owner's manual to verify correct fluids.

If you have a Gen 1, and just posted in the wrong area (no big deal with me, but the mods may move the thread), then you can use what you got for the front diff. For Gen 1 Titans ('04-'15), the front is spec'ed as 80W-90 GL5. Rear is spec'ed for synthetic, 75W-140 GL5, so if you have a Gen 1, don't use that oil in the rear.

cheers!

 

[Direland]

Oh my bad! I didn't read the whole forum title. Just thought it was general discussion. I have a 2009 Nissan Titan SE. Thank you for responding!

 

[dreep]

You are welcome. And, sounds good - you're fine for the front diff, just don't use it for the rear.

Personally, I like synthetics all around. If you plan on keeping the truck for the long haul, then periodic fluid changes are first priority, and better fluids come next. I use Red Line Oil synthetic fluids, which are polyol ester-based. Started using their products years ago, as the go-to for BMW Getrag transmissions, and it's what I keep on hand in my shop. Others in the forum like Amsoil products, Royal Purple, and I recall some using Valvoline synthetics. Any will do you well - the important thing is periodic changes.

Cheers!

 

[Direland]

Would you advise using what I have currently? Or buy new stuff?

 

[honda250xtitan]

yea that works for the front diff. Buy a little hand pump. it'll screw onto the top of that bottle. you'll also need another 2 bottles (i think the third one just barely tops off the diff) you gotta remove the skid plate under the front diff.

 

[dreep]

Would you advise using what I have currently? Or buy new stuff?

What you have is fine for the front diff. Front diff capacity is just under 2 quarts, so you'll need that much, as Honda said.

If you are due for a front diff fluid change, you should probably consider doing the transfer case and rear diff, too. Transfer case takes just over 2 quarts of Nissan Matic D (or a good brand Dexron 4 should work just fine). You should have new drain and fill plug washers on hand.

The rear diff must have synthetic fluid, and takes just over 2 quarts. Again, good brand of 75W-140 GL5 synthetic is fine.

A hand pump makes each job a whole lot easier - good recommendation from Honda - but don't use the same pump for the transfer case ATF, of course.

Finally, if it hasn't been done, also consider a drain and fill of the transmission pan. Spec is Nissan Matic S for a 2009, with Nissan Matic J an acceptable substitute. Although Nissan makes severe warnings to only use those fluids, many folks use good quality aftermarket brands, such as Amsoil, Red Line Oil, Valvoline, etc, with good results (should be Dexron 6 spec and must be listed as meeting requirements for Nissan Matic S by it's manufacturer). The transmission drain plug washer is the same P/N as the engine oil drain plug, and you will need a new one on hand. The service manual procedure is to measure the amount of fluid that drains fairly carefully, and to replace that amount (through the dipstick tube), then rechecking (normal procedure you probably know - level ground, engine idling, run through each gear, back to park, check with engine still idling). The amount that drains can vary. It should be between 4-5 quarts.

Cheers!

 

[Direland]

I did all of that today! Minus the transfer case, I'll have to do that soon. I've also been looking into the rear axel vent mod. Is the kit still sold here?

 

[dreep]

I did all of that today! Minus the transfer case, I'll have to do that soon. I've also been looking into the rear axel vent mod. Is the kit still sold here?

Sponsoring vendor Cajun bPipes has a kit. So does PRG Products. I'm a cheap guy... got the parts myself. Search the forum for the axle vent mod - most folks run a new vent tube up behind the right taillight.

If DIY inclined, to replace the factory failure-prone vent, you can use either Nissan part #38323-C601A and extend with 3/16" ID tubing, or Toyota part #90404-51026 and 1/4" ID tubing (this is the fitting commonly used in the complete kits), or Toyota part # 90404-51319 and 3/8" ID tubing. Get a cheap filter - no check valve - for the open end of the tubing such as O'Reilly's Part # 7-07103 (for 1/4" ID tubing).

The threads on these fittings are 1/8 BSPT (British Standard Pipe Taper thread), NOT 1/8" NPT (as you will find in your local hardware store) and NOT M10 straight thread metric. You might be able to force a 1/8" NPT fitting in - some folks have - but I wouldn't recommend it. There is a very slight difference in thread pitch - the correct 1/8" BSPT has 28 threads per inch, and the common 1/8 NPT is 27).

The Nissan and Toyota parts should be available for around $5-6 at local dealers. If you have trouble starting the new fitting, you can chase the threads in the axle with a 1/8"-28 BSPT tap (Sears has them for about $3 - Sears.com ).

Easy mod - hope this helps.

 

[Direland]

I sent a PM for the mod kit. I'm trying to do everything possible to get the most miles out of my Titan. Hoping to get to 200k plus, before I have to get a new one.