Q50 Rear Gear Oil Change

[@3103Juan]

Thanks for posting this video. Great step by step content. I did mines today and everything went smooth.

[@SpeedCultureStudios]

Glad to hear it!

[@mugensamurai]

To be honest yours is actually well kept. The ones I've been messing with are usually milky grey.

[@SpeedCultureStudios]

I know what you mean.

[@garagemgringa7910]

Great video, thank you for sharing, my next DIY for the weekend.

[@SpeedCultureStudios]

Thanks for checking it out and for the kind words! Good luck!

[@klippisfull]

@@SpeedCultureStudios do you know how to do the trans ? And what fluid it takes and how much ? I cant find it anywhere.

[@SpeedCultureStudios]

Byron Jeffers I do know how, yes and do plan to do that video soon. Off the top of my head, I do not know the volume or the specified fluid.

[@vz6235]

Good stuff man keep the Q50 stuff coming. Switch to the 3.0t one day! :P

[@SpeedCultureStudios]

Thanks! We will see what happens

[@banxmartinez8924]

thanx for the information 👍🏼I'll be doing mine next weekend.

[@jayg639]

GREAT INFORMATIONAL VIDEOS! 🙋‍♂️ student of yours for sure.. was wondering if you happen to have a video of bleeding out your heat exchangers?

[@SpeedCultureStudios]

Radiator flush? I haven't done one yet, but it will need it done this summer most likely.

[@jayg639]

@@SpeedCultureStudios yeah I just brought one for my car and was looking for someone with a good video of doing an installation..

[@tricksta213lag5]

Appreciate you brother and keep up the great content. My RS400 RWD is at 29000 miles, looking to replace the diff. Fluid, so my question is will this motul 300 75w90 do the job, also live in Sarasota, FL not sure if that makes any changes in oil viscosity? Thanks you for your time. Godspeed!

[@SpeedCultureStudios]

Thanks for watching man! Yes I believe the same fluid was used. I’d have to look at specs between the two cars, but I don’t believe there was a change in rear diff fluid.

[@jjorr1]

Omg your a life saver dude I appreciate it so I don't have to change any fluid on front that's it an my oil???

[@SpeedCultureStudios]

No fluid in the front unless you are awd

[@DG-888]

Nice video keep up the good, work so i can keep saving money, im a lv. 2 mechanic now. Can u do blinker fluid next lmao

[@SpeedCultureStudios]

Blinker fluid and muffler bearings coming up!

[@jasonsmart469]

Great tutorial.

[@SpeedCultureStudios]

Thank you!

[@videomaniac108]

The Motul Gear 75W-90 is excellent stuff that I use both in the diff and gearbox of my Z, it's a GL-4/GL-5 fluid that is good for both. I change my drive line fluids at not more than 15k mile intervals and notice hardly any metal filings on the magnetic drain plugs. When my car was breaking in, I changed the gearbox/diff oils early and swept the inside bottoms of the cases with a telescoping magnet to get all the metal particles out that I could. My 370Z has a viscous limited-slip differential that has a thick silicone fluid in a sealed chamber. It's okay to use regular diff fluid(GL-5) that you would use for an open diff.

[@littlej3777]

So this fluid for the differential also works for the transfer case

[@videomaniac108]

@@littlej3777 It works as a gear oil for any gearset that requires a 75w-90 viscosity. It uses extreme pressure(EP) additives that make it suitable for the hypoid gears in a differential that are subject to high shearing forces, hence the GL-5 classification. However, it doesn't use the corrosive sulfur, chlorine and phosphorus compounds used as EP additives in most GL-5 oils that would corrode soft metals like bronze or brass used in synchro rings in manual gear boxes. I don't know what EP additives Motul uses to get the oil to meet GL-5 lubrication requirements but I'm guessing they're more expensive that the commonly used ones I mentioned. My experience in using this oil in both the manual transmission and differential over a period of years in a Porsche and now my Z has been excellent; no failures, no gear whine and very little metal wear showing up as metal particles collecting at the bottoms of the gear cases at oil change time.

[@littlej3777]

@@videomaniac108 Gear oil is same thing as transfer case gear oil correct?

[@videomaniac108]

@@littlej3777 In the case of older vehicles they may be the same thing, but in modern multi-axle vehicles with AWD/4WD and DCT or systems with wet clutch packs it is probably a specialized kind of transmission fluid. The gear oil that I mentioned is what is used in older manual transmission gear boxes and in ring and pinion hypoid differentials. The owner's manual should specify what type of fluid is needed for the transfer case.

[@trereese77]

Just got all my parts!!!

[@SpeedCultureStudios]

Yes!!

[@tonym6860]

nice video as usual, this is on my top of the to do list on the car, i just hit 48k . do you plan to do trans fluid ? keep up the good work.

[@SpeedCultureStudios]

I do plant to do trans fluid. Just a drain and fill but I’m going to wait a bit for that.

[@colbyconaway2664]

Just got mine done at 49k, the drain and fill took around 7quarts of matic s fluid

[@DG-888]

@@colbyconaway2664 is matic 's' oem or matic j? Which is the upgrade?

[@colbyconaway2664]

The car comes stock with matic j so matic s is the upgrade

[@Devilxxksa]

thanks for posting that , my question is should I add any rear diff oil additives ? or oil is just enough for it . my mechanic said u don't have too

[@SpeedCultureStudios]

No need for additives--as long as you select the correct gear oil for your specific vehicle.

[@Devilxxksa]

@@SpeedCultureStudios thank you so much , I hope you the best ♥️ keep what’re u doing

[@SpeedCultureStudios]

@@Devilxxksa Thanks for watching!

[@drklg1]

I know you mostly autocross but how does it launch since you changed it?

[@SpeedCultureStudios]

The car feels no different after changing the fluid. I wasn’t expecting a change in feel though.

[@datm340i6]

Do you have to change it? Because I’m right around 43,570 mile, I do have AWD.

[@SpeedCultureStudios]

It really should be changed, especially if you work the car! There are people that never change it I’m sure, but a drain and fill at regular intervals is a good idea. I made it 44k miles with no issues and found nothing surprising after pushing the car pretty hard, but for how simple it is, it’s worth it!

[@DanielRuiz-ux3bf]

What’s up brotha , I have 2018 Q50s 3.0, I am at 30k miles and was wondering if this would be a good time to do this oil change. Can I use the same MOTUL 300 you are using on the 3.0? Or do you recommend using the Nissan Dealer S Fluid?

[@SpeedCultureStudios]

I would assume it’s the same spec as the 3.7 rear end. Just check the manual. It’ll either be 75w90 or 80w90. Either way, motul will have an option for you. It’s going to be higher quality than dealer fluid. 30k miles might be a little early if you just do regular driving, but if you’ve pushed it hard regularly it can’t hurt to change it!

[@DanielRuiz-ux3bf]

Speed Culture Studios I push this pretty hard, got basically all the bolt ons and soon a tune. I feel like MOTUL is the way to go

[@onieshianapoleon2547]

Can you use this Gear oil on a 2014 Q60 JOURNEY COUPE? or is there different specifications

[@SpeedCultureStudios]

It’s probably the same I would guess. Shouldn’t be hard to find though

[@inifintileoa3006]

You should do a drain and fill transmission service

[@SpeedCultureStudios]

On the list!

[@lilbot3807]

@@SpeedCultureStudios did you use the same motul oil for you drain and fill transmission service?

[@SpeedCultureStudios]

@@lilbot3807 I did not end up doing the service. With how finiky these transmissions can be, I would recommend having a dealer do it

[@lilbot3807]

@@SpeedCultureStudios thank you🙏🏽

[@spawnandbatman6975]

I wonder what the dealership would charge to change the tranny fluid? I head the 3.7 models transmission is not as good as the 3.0t. I still think the 3.7 q50 is more reliable though

[@minijcjr1]

How would this process be different on the AWD version of the Q? Would it just be the same thing twice? Since the AWD has 2 differentials?

[@SpeedCultureStudios]

Essentially the same. Here’s a link to a good vid from enthusiast pov: kzbin.info/www/bejne/aGbTZHSLlsiIi5o

[@minijcjr1]

Speed Culture Studios thank you. Do you think i can use the 75w90 oil instead of the recommended 80w90 for the front differential? Going to be changing the fluids this weekend.

[@SpeedCultureStudios]

Jose Cintron Honestly, it would probably be ok, but I do not recommend changing from the recommended fluid viscosities. The first number represents the viscosity at cool temps-so the 75 would be slightly “thinner” at start or cool temps. This wouldn’t necessarily hurt, especially if you live in a cool climate. However, modern cars are engineered to such tight specs that changing anything up could have an impact. Like I said, it’s probably fine, but I wouldn’t recommend it.

[@Q50s]

Once again im at 101k and I dont think it has never been done is this hurting my performance in anyway?

[@SpeedCultureStudios]

Can be yes. If your rear gears are not properly lubed your generating excess friction and heat in the rear. Can hinder performance and cause premature wear.

[@q50acee]

I have the same car as you. Can it run 75w-140 royal purple performance gear oil?? Please lmk asap!

[@SpeedCultureStudios]

Spec is like 75w90. I don’t know if I would go 140

[@elcolin_]

Did you notice any difference afterwards? Where did you get your Motul, on Amazon?

[@SpeedCultureStudios]

No noticeable difference, but you really shouldn't notice anything unless your rear end was crazy noisy because the fluid had gone so bad. Motul can be found on Amazon yes or other vendors.

[@bn4241]

What about Redline 75w90? I'm thinking of changing it before I head out on a road trip. You recommend? Or go with Motul 75w90?

[@SpeedCultureStudios]

I’ve never used it but many people swear by it. Saw it pop up on a bunch of top 5 lists

[@videomaniac108]

The Redline 75W-90 is excellent stuff that I've used on a number of high-performance cars in the past.

[@isaiassalas1834]

How often should I do oil changes? Just did the engine oil change bc I was approaching 5k miles since I got it, and for the trans I was gonna wait maybe till I put 50k miles and diff once I put another 5k on it.

[@isaiassalas1834]

Previous owner did the changes when he had it, I got it with 68k miles 2014 3.7

[@SpeedCultureStudios]

I recommend every 5k for oil even though manual says 10. I think they say rear diff every 25k. Trans is an iffy one-if it’s shifting fine, I’d say leave it alone. If you have to do it-do drain and fill at 70-75k

[@xYrnAntx]

What’s the difference between using motul and the Nissan matic s for the rear differential ?i have a 19’ RWD q50s 3.0t btw

[@SpeedCultureStudios]

Preference. Motul is more geared toward “performance” applications, but it would be difficult the tell or measure an actual difference

[@xYrnAntx]

@@SpeedCultureStudios

[@xYrnAntx]

Genuine NISSAN HYPOID FLUID·S1 GL-5 75W-80 or equivalent

[@xYrnAntx]

Should I use the motul 75w90 or should I get a motul 75w80

[@xYrnAntx]

That’s what pops up in my manual ^^^

[@ottochan3117]

Is 2.0t version is all the same ?

[@andrik1862]

Why didn’t you do the front diff? I just did my rear diff. & followed your KZbin video.

[@SpeedCultureStudios]

I don’t have a front diff.

[@juanagustin4897]

When you planing to do transmission fluid change?

[@SpeedCultureStudios]

Probably do it this winter.

[@littlej3777]

If you can share what motul fluid would work for the 3.7 q50 for transfer and transmission?

[@clarencewilliams61]

should you change front and rear fluid together both use 75w 90 right ?

[@SpeedCultureStudios]

It’s a good idea to change them at the same time

[@clarencewilliams61]

@@SpeedCultureStudios ok thank u I brought 75w 90 from your Amazon link for front & rear fluid oil change the dealerships Recommend I change the rear fluid oil because I got 60k miles smh 🤦🏾‍♂️ $ 375 but I’m do front & rear somewhere else’s cheaper hopefully 🙏🏿 $400 get done ✅ #youtheman💯🤙🏿😎

[@armandogomez2677]

Ever change the power steering fluid ?

[@SpeedCultureStudios]

Haven’t uet

[@ziffy774]

How big an extension were u using?

[@M33S23xX]

Hey so what was the torque spec for the diff bolt?

[@SpeedCultureStudios]

I don’t recall at the moment.

[@inifintileoa3006]

26 ft lb

[@vasilikharabadze141]

Hi,i have q50 2014 hybrid awd. Motul gear 300 or motul gear 300 LS rear diff??? And i dont know what is best for front diff ?infiniti manual 80w-90 oem??? Thanks

[@SpeedCultureStudios]

Oem yes. You don’t have an Limited slip diff so just the regular gear oil

[@vasilikharabadze141]

@@SpeedCultureStudios ok,thanks.i will buy motul gear 300 for rear diff,but front differential which brand??? you have a video for wheel spacers???

[@JClay-lf7nx]

How do you keep it so clean up under there?

[@SpeedCultureStudios]

Just always make sure to clean it as part of a routine

[@josealcantar6127]

How often does this need to be done every 30,000 miles?!?

[@SpeedCultureStudios]

No not that often. If you don’t run the car hard, it can go well beyond 30k. Check manual for specs

[@osbaldosalazar6999]

Can I use the same diff oil ? As you for my q50 2016 3.0t rwd ?

[@SpeedCultureStudios]

I’m sure you can but it doesn’t hurt to Google requirements

[@osbaldosalazar6999]

@@SpeedCultureStudios thanks !!’ And so far I’m seeing I could use the same 75w90

[@oscars61743]

Does that apply to rear wheel drive only? Or AWD as well?

[@SpeedCultureStudios]

AWD as well. Both rear diff and the transfer case fluids should be changed. Good video for transfer case fluid change: kzbin.info/www/bejne/aGbTZHSLlsiIi5o

[@chrissegovia8086]

Whats the tool you use that you put in your socket? Where can i get it

[@SpeedCultureStudios]

It’s just a socket style Allen key. You can get them anywhere like Lowe’s or Harbor Freight. You can also click the link in the description and get a set!

[@chrissegovia8086]

My bad i did see your link in the description i might order all tools and do it myself i also wanted to ask if i put motul in the rear will the transmision fluid need the same fluid i dont plan on doing the transmision flush myself i plan on having shop do that and i know they probably dont carry motul oil or should i just let them do both jobs that way it has same oils?

[@SpeedCultureStudios]

chris segovia no they don’t have to be the same. Some brands have great trans fluid but not so good rear gear fluid. Some have good engine oil and rear gear fluid is no good.

[@chrissegovia8086]

Speed Culture Studios thank you apreciate it

[@TrueRedNatioNe4]

What torque spec did you use to tighten the plugs?

[@SpeedCultureStudios]

By feel lol. I don’t think they require much torque though honestly.

[@TrueRedNatioNe4]

Ok thanks man. Great videos, subscribed and I'm watching all your videos, over and over. I torqued to feel as well. Just checking. Keep the vids coming.

[@bannyvongphachanh8052]

I bought same 75w90 motul but it was Gear 300 LS but mine came to be 100 synthetic ester fluid and was blue. Is it still safe to use?

[@deesauto5741]

I’m in the same situation

[@bannyvongphachanh8052]

@@deesauto5741 I read that it’s safe to use the additives don’t hurt it but I switched to right stuff incase

[@vtecnegro85]

Ever tried boron products?? 🙂🙂

[@SpeedCultureStudios]

No I have not

[@giannil384]

What offset do your tires have?

[@SpeedCultureStudios]

Tires don’t have offsets-I’m guessing your asking about the wheels? The wheels have a +35 offset. The tires are 275-35-19 rear And 255-40-19 front.

[@JazicB]

Is your dog a brindle pitbull?

[@SpeedCultureStudios]

He is a mix of things but brindle yes

[@SirBakesAlott420]

Why not go with Royal Purple ?

[@SpeedCultureStudios]

I think I mentioned it in the video. I’m a big royal purple fan. It performs well, but it doesn’t do very well when it comes to noise reduction.

[@danielguerrero3853]

What happens if I have never changed it I’m at 65k right now should I change it ??

[@SpeedCultureStudios]

Some people never change it. The fluid just begins to lose lubricating qualities and it puts more strain/friction on the gears. If you push the car hard, I would suggest changing it.

[@danielguerrero3853]

Taking your advice man because with this car there’s not a day where I don’t push it

[@SpeedCultureStudios]

Daniel Guerrero Smart move then lol.

[@Qkfltpdls777]

How can I level the rear diff fluid correctly if I can jack up the rear side of the car only? (you know the car will be tilted and the rear diff level job wouldn't be accurate)

[@SpeedCultureStudios]

You can lift it by the rear diff and put it in stands then lift the front

[@Qkfltpdls777]

@@SpeedCultureStudios didn’t you lift rear only?

[@SpeedCultureStudios]

@@Qkfltpdls777 yeah I think so. Ideally you’d level it or slight tilt back, but if you can do rear only you’ll still get most of the fluid out

[@Qkfltpdls777]

@@SpeedCultureStudios my concern is not the drain, but leveling..

[@SpeedCultureStudios]

@@Qkfltpdls777 the reason to level is to get a good drain. Why are you worried about leveling?

[@jayanthrishi4312]

i have rear differential oil leaking issue

[@SpeedCultureStudios]

Are you sure it’s the diff and not the axels?

[@menambre9964]

Is this the same for Awd q50s also?

[@SpeedCultureStudios]

Yes

[@menambre9964]

@@SpeedCultureStudios thanks

[@louievee310]

What size is that hex

[@SpeedCultureStudios]

I don’t even know actually.

[@joshthepimpj]

#1 follower

[@SpeedCultureStudios]

Thank you!! I appreciate the support!

[@VqVang]

My local Infiniti wants $160 for this job,hell nahhhhh...doin it myself😊

[@SpeedCultureStudios]

Definitely!

[@VqVang]

@@SpeedCultureStudios yea man..dealerships stay tryna finesse ppl

[@rulasg35]

I just called a service shop down the street, they want $159. Saw the video and it looks very simple. I'm doing it my self.

[@vasilikharabadze141]

Hi,you know part number for rear diff bushing???

[@SpeedCultureStudios]

I do not-I don’t think they are replaceable on the Q

[@vasilikharabadze141]

@@SpeedCultureStudios same g37 i think. Rear diff brace really work?

[@SpeedCultureStudios]

@@vasilikharabadze141 on the g yes it does

[@vasilikharabadze141]

@@SpeedCultureStudios from my Q50 bushing leaked,what will i do???

[@SpeedCultureStudios]

@@vasilikharabadze141 check with z1. Maybe they have a replacement idea.

[@tiekuhn3839]

Is this an AWD?

[@SpeedCultureStudios]

No

[@tiekuhn3839]

@@SpeedCultureStudios thanks bro, similar process on the AWD id assume? I’m dumb does awd also have a front diff?

[@SpeedCultureStudios]

@@tiekuhn3839 oh yeah same on rear. Front diff is still not bad

[@tiekuhn3839]

@@SpeedCultureStudios appreciated !!!