suitable oil grade for MT & rear diff

[bonjo]

I run a toyota RAV4.2 uk model manual, 2ltr petrol.

here is the oil spec
for the g/box (actually it is a transaxle as there is no center diff) GL-5 SAE 80w90

rear diff (which is not an LSD) API GL-5 SAW90

A couple of years back, the dealer changed the oil but used their approved brand (castrol??)

I have used mobil synthetic gear oil previously in 2 & 4 wheel drive cars with good results. What bugs me is I cannot source synthetic API GL-5 SAW90 and most GL-5's are 75w90

any ideas or suggestions??

 

[Kamele0N]

Have a nice read

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/1231182/Synchromesh_Manual_Transmissio

 

[Kamele0N]

From the days when I was working at Toyota dealer...back in 2007..

Rav4 didnt have problems with universal 75w90 gl4/5 MT-1 gearbox oil...only corola and auris needed GL4 oil othervise changing gears become notchy...

We were using rebranded Texaco multigear S 75w90... A.k.a Petrol multi gl 75w90...

Get a PDS online (Texaco has it) and find oil with similar characteristics.. Kv40 kv100 etc

 

[Kamele0N]

Mobil1 is spot on...and also OEM supplier for Toyota regarding fluids.

https://www.opieoils.co.uk/p-806-mobil-m...earbox-oil.aspx

PDS: https://www.mobil.com/english-gb/commercial-vehicle-lube/pds/glxxmobilube-1-shc-75w90

 

[zeng]

Originally Posted By: bonjo
I run a toyota RAV4.2 uk model manual, 2ltr petrol.

here is the oil spec
for the g/box (actually it is a transaxle as there is no center diff) GL-5 SAE 80w90

rear diff (which is not an LSD) API GL-5 SAW90

A couple of years back, the dealer changed the oil but used their approved brand (castrol??)

I have used mobil synthetic gear oil previously in 2 & 4 wheel drive cars with good results. What bugs me is I cannot source synthetic API GL-5 SAW90 and most GL-5's are 75w90

any ideas or suggestions??

I know of no fully synthetics in SAE 90 viscosity grade gear oils, though States do have fully synthetics 80W90 (not sure if it's GL4 or GL5).

Sourcing for a fully synthetics in SAE 90 GL5 is akin to one sourcing for mineral oils in say, 0W40 0W30 engine oils.

In my tropical ambients, OEM recommendations of GL5's in 80W90 and SAE 90 viscosity grades is akin to recommending mineral oils specifically ......
and that seems to apply in UK, IMHO.

Edit:
A SAE 90 grade has a KV@40*C ranging from 135 cSt to 224 cSt pre-2000.
A fully synthetic 75W140 typically has a KV@40*C of 170 cSt, and could be an alternative in your case.

 

[artificialist]

Whenever I worked on a Toyota that called for SAE90 in the rear axle, the repair shops I worked for simply used conventional 80w90 or synthetic 75w90 and it was never a problem.

Wouldn't the transaxle have a PTO that takes power from the transaxle to the rear driveshaft? That would be another part that needs oil, and usually Toyota calls for 80w90 or SAE90 gear oil. You could use 75w90 synthetic if you want to.

 

[zeng]

Originally Posted By: zeng
Edit:
A SAE 90 grade has a KV@40*C ranging from 135 cSt to 224 cSt pre-2000.
A fully synthetic 75W140 typically has a KV@40*C of 170 cSt, and could be an alternative in your case.

Amendments,the bold should read as:
"A SAE 90 grade has a KV@40*C ranging from 135 cSt to 320 cSt pre-2000."