Outer Limits 4x4 Board

Can you use the same oil in both gearbox and diff? I went up to get some oil this morning, and they guy there recommended using a SAE80w-90 oil in the diffs...but this is the same oil I use in the gearbox. I would of thought that the two would of used different oils (the diffs using a thicker oil)...is this correct?

If it matters its for a HJ60.

Mobil recomends the same oil.
http://www.datateck.com.au/lube/mobil_au/menu.asp

yep i use the same

i buy a 20L drumm of it at a time with a pump that connects to the drumm

easy as pie to change oil

but you would have 2 run different oils if you run lockers as in a 90 / 140 limslip, couldnt use that full time in your gearbox as well could you?

Also depends on if you've got an LSD (if they were available in 60s?). In such a case youy'd use special LSD oil.

would probably be right...my zooks runs SAE 80W90 in diffs, gearbox and tranny! 5L of oil and ive changed the lot! ahh the advantages a zook has on the wallet....

i use 85/140 in open diffs as its a bit harder wearing..

and 80/90 in box's, although some will require 75/90 or in the case of many landcrusiers haveing trouble with the gear selection and to get better changes and life id recomend useing a synthetic, like BP easyshift.

i use SAE80w-90 in my gearbox t/c and front diff

i use LSD oil in my rear (as its an LSD)

ive got an 89 HJ60

I use 75/90w gear oil in my box, transfer and front open diff... and Limslip 90/140w oil in my rear LSD.. bit higher viscosity for offroad conditions.

Nev, 5L to change the lot is great!! Must be small diffs My diffs take 1.5L each! and my gearbox uses what you use in the lot No wonder its so heavy

have a look in some of the books the oil ppl put out. some of the lsd oil will work fine in open diffs and gear boxes. and if you have an auto you will often find dextronIII is over and above what is needed in your auto and at half the price. 4speed auto in the ford for example the fluid recomended by ford it just about double the price of dexIII and in 10.000k the ford fluid is black burnt and fucked. use the dextron and 20.000k and its still red and shifts tops. at the end of the day i recon go to some one like repco cause thay have all the cross refance books or see a trans shop and ask them. fark long post about oil. im not going to get in to the advantages/disadvantages of useing auto trans in manuals

BeZeRK, i remember reading a thread regarding using a a different gearbox oil to whats reccomended by the manufacturer in an effort to reduce that notchy feel the 80's box can get.

didnt may much attention then but noticing it now. any references would be good, ta.

1ltr zook diff takes 1.3ltrs of oil.

Shadow wrote:i use LSD oil in my rear (as its an LSD)

you had a LSD, unless it's only got a couple of thousand K's on it !

same oil used in both g/b and diffs, they are both gear housings.

I use the same in both gearbox, transfer, front and rear diffs and the diffs are air lockers. It all works perfect. my diff takes 4.5 litres of oil for one.

If you have trouble selecting gears when the beast is cold you should try one of the lighter grade oils such as 75/90. Or even Auto trans fluid.

henry, thanks for the info. what diffs do you have that hold 4.5l each hell thats heaps

i wonder if having a thinner oil in the diffs would stop alot of the diff oil mist being sprayed when the lockers are disengaged as it would be more inclined to drain out rather than clog

but why do they recomend the 90/140 limslip 4 lockers anyway