Transfer Case and Gear Box

[ShortyNavros]

Hey All,

I have a 2004 D22 Navara STR 4WD with a ZD30. Just recently changed the dif oils and I was wanting to change the gb and transfer case fluids as well (mainly because I just bought the vehicle a couple of months ago and have no idea when it was last done, if ever).

I know he recommended fluids are:
Manual transmission
gear oil
FS5R30A
4WD 5.1L
API GL-4, Viscosity SAE 75W-85 only

Transfer fluid TX10A 2.2L
Genuine Nissan ATF or equivalent or API
GL-4

So going off this I can fill both with the same fluids, as both require GL-4 and the same viscosity I believe. SuperCrap are running a special on nulon fluids at the moment so I will probs buy one of these, the one I am looking at is their Semi-synthetic 75W-90 Gear oil which is rated a GL-5, here is the link http://www.nulon.com.au/products/Ge...anual_Gearbox_and_Transaxle_Oil/#.UpAVLMSVMXw

My question is can you run GL 5 in place of GL 4 and 75W-90 in place of 75w-85, I know the higher the number the higher % of anti-wear friction modifiers it has in it or something. I'm sure I read somewhere that its a bad idea to use a higher GL than recommended but cant be sure. If thats the case would I be better off getting this GL4 http://www.nulon.com.au/products/Ge...anual_Gearbox_and_Transaxle_Oil/#.UpAXEcSVMXw

I only want the semi-synthetic as they are apparently better and seeing as Ill likely change them once I may as well pay the extra 6 bucks a bottle to get a better quality oil.

Sorry if this all convoluted but I am just not sure what I should buy.

Cheers,
Shorty

 

[04SilverSTR]

you can run the oil in both, i have a new penrite one in mine that does both gearbox and diff, bloody good stuff!

bryan

 

[ShortyNavros]

So you say you can run 75W-90 GL5 rated oil both the gearbox and the transfer case? Bryan how much fluid did your gb take? I was reading somewhere that the recommended about 5.1L was actually different to what you could fit in, nissane released a bulletin on it or something? I read it in this thread. http://www.navara.asia/showthread.php?t=23664

I keep reading conflicting things, some people use GL5 and then other say dont use GL5 only use GL4.

 

[fourocker]

Don't put GL 5 in there, it won't shift well, the box in these is engineered for the older GL 4 spec.
You can use ATF (automatic transmission fluid) in the transfer case but not in the gearbox, my advice, buy enough GL 4 spec oil to do both ( I used Castrol SAE 80 Smooth shift and very happy ) and don't worry about semi synthetic as you will not be just changing it once if you wish to maintain your vehicle properly, I don't recall the intervals but would expect it to be around 40, 000 km or roughly every 1.5 to 2.5 years depending on the severity of use.

 

[ShortyNavros]

Cheers fourocker, that was the definite answer I was looking for. Ill stick with a GL4

 

[ShortyNavros]

Ended up buying SAE 80 Smooth Shift Manual Gearbox and Transaxle Oil as virtually no where stocks gear oils, it was basically a choice between Nulon and the Castrol VMX-M 75W-85. Chose Nulon as it was on special and I would rather support an Aussie brand, hopefully it wont let me down