What oil for 120 diffs/transfer and gearbox?

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

What brand viscosity oil do you use? Any additives?
If it's slightly different to Toyota recommendation why?
Or what oil do you recommend.....?

Front diff?
Rear diff?
Transfer case?
Manual?
Auto?

[gxl_d4d Advanced Member Find all posts View Profile Close gxl_d4d]

Front diff? Caltex Thuban 80w90
Rear diff? Caltex Thuban 80w90 (I have an open diff)
Transfer case? Caltex Thuban 80w90
Manual?
Auto? Toyota WS fluid.

[wooley Avid PP Poster! Find all posts View Profile Close wooley]

I like all the Toyota fluids as they come in super awesome packaging, metal bottles, tins etc. lol

[fourbyphil Senior Member Find all posts View Profile Close fourbyphil]

Been using penrite up until the last oil change, when I thought I'd try the repco branded stuff as its a bit cheaper. Diff oils seem fine , but I have noticed with the cold weather the gear changes are not as smooth until warmed up. The penrite oil was better, will switch back next time.
Cheers
Phil

[fourbyphil Senior Member Find all posts View Profile Close fourbyphil]

Forgot to mention engine oil...
Use penrite HPR 5W-30 in cooler months, and 10w-40 when it's warmer. The 5W is definitely the way to go in cold weather , much smoother starting
Cheers
Phil

[Anth120playdo Banned Find all posts View Profile Close Anth120playdo]

Been using penrite up until the last oil change, when I thought I'd try the repco branded stuff as its a bit cheaper. Diff oils seem fine , but I have noticed with the cold weather the gear changes are not as smooth until warmed up. The penrite oil was better, will switch back next time.
Cheers
Phil

Just thought id let you know, Currently Penrite supply Repco branded oils - So its the same stuff.... oils aint oils? or are they?

[fourbyphil Senior Member Find all posts View Profile Close fourbyphil]

Yeah thanks #############,
the guy at repco mentioned that, seemed to think that the cheap oils they make are the repco ones. Rather than the more expensive penrite ones, if that makes sense. I compared both, they were different colors, but maybe that doesnt mean anything
Cheers
Phil

[letterboxman Junior Member Find all posts View Profile Close letterboxman]

front diff: penrite limslip 90
back diff: penrite limslip 90
transfer: penrite limslip 90
auto trans : toyota ATF Ti-4
engine oil: HPR 10.

does any one have any opinion on using one oil for all three?

[gxl_d4d Advanced Member Find all posts View Profile Close gxl_d4d]

New prado's use a lighter fluid in the driveline. Not sure if the driveline was changed or if it's a fuel economy thing.

[fourbyphil Senior Member Find all posts View Profile Close fourbyphil]

front diff: penrite limslip 90
back diff: penrite limslip 90
transfer: penrite limslip 90
auto trans : toyota ATF Ti-4
engine oil: HPR 10.

does any one have any opinion on using one oil for all three?

Should you be using a limited slip oil in an open diff? ( the front diff is not LSD)
Cheers
Phil

[gxl_d4d Advanced Member Find all posts View Profile Close gxl_d4d]

Using an LSD oil in a non-LSD is not a problem. You have to be carefull with transfer cases and manual gear boxes. If the owners manual states GL4 oil only, you shouldn't use a GL4/GL5 oil unless the manual also states you can use MT-1 and the LSD oil satisfies the spec. The additional EP additives can attack bronze components in the gear box depending on the alloy. The EP additive is usually a sulphur/phosphorous type additive which turns corrosive as it degrades. More expensive/heavy duty oils use a borate additive which is universal and dosn't cause any problems with corrosion.

This was the advise provided by Caltex lube techs guys when I was purchasing oil. They suggested for transfer cases, if in doubt, always use a GL4 only oil as most manufacturers are not forthcoming with their additive technology.

[fourbyphil Senior Member Find all posts View Profile Close fourbyphil]

I have recently added an ARB locker to the rear of my beast, I presume I don't need to be using LSD oil anymore. What type of oil are others using for this?
Cheers
Phil