HZJ75 gear box oil (1 Viewer)
- Thread starter rlzel
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Ive always used Castrol EPX 80-90 GL5. Its what most owners use in Australia for landcruisers I think. It appears to be a heavier duty than the GL4
GL4 in the trans and transfer as they often have fluids migrate between each other. Best to run the same fluid.
Amsoil and redline has a 75w-90 gl4
Amsoil and redline has a 75w-90 gl4
Here is the best gear oil comparison testing I have ever found online. Some big names like Lucas scored surprisingly low over all. Although the testing was done for Amsoil and they come out the winner you will see they dont claim to win every category, only 5 out of 11. But even if you dismiss the Amsoil results as biase it gives a good break down of the other products. For me the biggest surprise is that both Lucas and Royal Purple both failed the "yellow metal testing"
http://www.lastgreatroadtrip.com/wp-content/uploads/2010/11/gear-oil-comparison.pdf
http://www.lastgreatroadtrip.com/wp-content/uploads/2010/11/gear-oil-comparison.pdf
Why would you need to use a GL4 when the FSM specifies either GL4 or GL5 for the H41/H55F?
Looking around at what is on the oil forums it seems GL5 is suitable for gearboxes with yellow metal in the synchonisers these days.
It must have been suitable for a long time because the FSM I looked in is an 84-90.
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This is what i was not sure about , the fact that on the FSM GL5 is an option but it's also known that GL5 attack yellow metals.
I have used VMX80 but I think the Castrol EPX is a heavier duty oil. The synchros in H55F need all the help they can get,even when new they feel like they are fxxxed
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Just use GL-4 to be safe, you don't need the pressure additives of GL-5 in the gearbox, also you are risking eating away the yellow metals, at least that is what I learned in school...
So GL-4 in transfer and tranny and GL-5 in diffs. I am currently running the Redline MT-90, Amsoil also has a GL-4, mettoo..http://www.amsoil.com/shop/by-produ...and-transaxle-gear-lube-75w-90/?code=MTGQT-EA
It is indeed strange that Toyota does not specify GL-4 only...
So GL-4 in transfer and tranny and GL-5 in diffs. I am currently running the Redline MT-90, Amsoil also has a GL-4, mettoo..http://www.amsoil.com/shop/by-produ...and-transaxle-gear-lube-75w-90/?code=MTGQT-EA
It is indeed strange that Toyota does not specify GL-4 only...
Exactly what is said above.
As I said before,if Toyota are saying its ok and the various oil sites are saying the GL5 is ok.Why worry about nothing.
Anything else is out of date info.
Toyota have 18000 engineers working for them (at 1990 levels). I am not going to try and outsmart them.
Because not all GL5 oils are created equal. 90% of them are fine but if you look at the link I posted you will see that all of the oils tested are GL5 rated but not all passed the yellow metal test. Personally I've been using GL4 rather then taking the chance because I dont see a downside in doing so
Maybe Toyota have added something to the metal to make it resistant to any corrosion. We have got hundred thousand H55f in Australia in a relatively small population and no one bothers whether GL4 or GL5 goes into the gearbox and I can not recall a single instance where the GL5 oil has been blamed for damaging a gearbox.
Im pretty sure the guy who rebuilt a gearbox for me recommend the Castrol EPX 80-90
Do you think Toyota would say its ok to use GL5 without somehow sitting down and having a good think about it?
EDIT. I just had a closer look at Castrol Australia site and they are recommending their Universal 80-90 API GL5 for HZJ75 .
I said I used EPX 80-90 as I found one in my shed but it may have been the one I used in the front diff.
They are also recommending their Universal 80-90 API GL5 for Hilux ,4 runner , Bundeera ,Rav 4 Dyna ,all Prados , V8 diesel LC and Coaster
So now we have Toyota and Castrol saying GL5 is ok.
Im pretty sure the guy who rebuilt a gearbox for me recommend the Castrol EPX 80-90
Do you think Toyota would say its ok to use GL5 without somehow sitting down and having a good think about it?
EDIT. I just had a closer look at Castrol Australia site and they are recommending their Universal 80-90 API GL5 for HZJ75 .
I said I used EPX 80-90 as I found one in my shed but it may have been the one I used in the front diff.
They are also recommending their Universal 80-90 API GL5 for Hilux ,4 runner , Bundeera ,Rav 4 Dyna ,all Prados , V8 diesel LC and Coaster
So now we have Toyota and Castrol saying GL5 is ok.
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Maybe Toyota have added something to the metal to make it resistant to any corrosion. We have got hundred thousand H55f in Australia in a relatively small population and no one bothers whether GL4 or GL5 goes into the gearbox and I can not recall a single instance where the GL5 oil has been blamed for damaging a gearbox.
Im pretty sure the guy who rebuilt a gearbox for me recommend the Castrol EPX 80-90
Do you think Toyota would say its ok to use GL5 without somehow sitting down and having a good think about it?
EDIT. I just had a closer look at Castrol Australia site and they are recommending their Universal 80-90 API GL5 for HZJ75 and any Toyota.
I said I used EPX 80-90 as I found one in my shed but it may have been the one I used in the front diff.
So now we have Toyota and Castrol saying GL5 is ok
Im pretty sure the guy who rebuilt a gearbox for me recommend the Castrol EPX 80-90
Do you think Toyota would say its ok to use GL5 without somehow sitting down and having a good think about it?
EDIT. I just had a closer look at Castrol Australia site and they are recommending their Universal 80-90 API GL5 for HZJ75 and any Toyota.
I said I used EPX 80-90 as I found one in my shed but it may have been the one I used in the front diff.
So now we have Toyota and Castrol saying GL5 is ok
