Transmission and Differential fluid change

[94boosted]

Motul meets both: https://azupim01.motul.com/media/motulData/DO/base/GEAR_300_75W-90_en_DE_motul_34200_20221014.pdf

Thanks razorlab, that datasheet doesn't explicitly list "G4" though?

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[razorlab]

Thanks razorlab, that datasheet doesn't explicitly list "G4" though?

G4 is GL-5

 

[94boosted]

G4 is GL-5

Thanks @razorlab !

 

[razorlab]

Thanks @razorlab !

Also, if it makes you feel more comfortable about the oil, I used both Motul and Liqui-Moly in the rear diff all last season. 22 track days or so.

Bunch of other track guys use that oil as well, some even go to a heavier 75w140

 

[94boosted]

Also, if it makes you feel more comfortable about the oil, I used both Motul and Liqui-Moly in the rear diff all last season. 22 track days or so.

Bunch of other track guys use that oil as well, some even go to a heavier 75w140

Good to know, leaning towards the Motul. I'm probably being overly proactive but in my previous Camaro SS 1LE it was strongly recommended to change the rear diff fluid quite frequently for cars that got tracked/autocrossed. After a season of autocross/track in my Supra I'm doing the same.

FYI I did reach out to Liqui Moly directly and below was their response:


hi,

thank you for contacting Liqui Moly support.

Unfortunately we do not currently offer an appropriate differential gear oil for your 2019- Toyota Supra. St this time we suggest contacting your local dealer for the proper fluid.


Regards,

Stefan Braun
Application Specialist

 

[concept]

Motul Gear 300 75w90 or Liqui moly you linked. Don’t pay $80 for oem, that’s insanity. Especially since it actually costs $45.

@concept got taken for a ride.

My car is under warranty and needed just a couple of ounces to top off the factory fill. I dislike mixing different oils. That's why I chose BMW fluid.

 

[BA9092]

Motul 300 75W90 has two versions, the regular 300 (105777) and the 300 LS (105778). Which one do we use?

Motul's website recommends the 300 LS for the Supra. However, the 300 LS is a GL5 while the regular 300 is GL4/GL5.

 

[Rolos]

G4 is GL-5

Should I use this one?

 

[lucky phil]

Should I use this one?

The LS version is for Limited Slip diffs. I'm suspecting it's for the old/original style LSD's to prevent the chatter some used to have and speced an oil additive in addition to the base oil. I'd go with the std 75w90 for the Supra style electronically controlled diff but I'm open to other views on it.

Phil

 

[SUPER SAIYAN SUPRA]

At what mileage do you change the Transmission and Rear Differential fluid? Would you use the BMW fluids or something better like Redline, etc?
Any idea how much this maintenance costs and is Toyota capable of carrying out this maintenance?

Went to various dealerships, none would give me any service interval or state this was a "lifetime fluid". I already knew from Toyota WS that this was false, so I asked representative that works at the shop that produces our transmission. They told me every 30-40k. So I incorporated that alongside the large 30k service interval that already comes with the supra.
Mine consists of (solely because I am very strict on my services)
-Spark Plugs
-Coolant
-Brake Fluid
-Differential Fluid
-Transmission fluid with filter replacement
-Oil Change.
Also a big tip I learned when servicing the transmission, do yourself a favor and with a jack or support device remove the 4 bolts holding the rear of the transmission support and lower to have the fill plug at ratchet/torque level instead of cutting hex to fit and possibly braking the bit or having the bit stuck when backing out.
Also last tip when doing the rear differential service, the anti vibration device mounted on the rear subframe is held by 1 bolt that is itchy to strip as its 2 different diameter and threads on 1 bolt (engineers....). Please find the torque spec and be light as its prone to strip and or break, after its removal, the differential is a breeze.
ALWAYS HAVE ENOUGH FLUID TO FLUSH OUT METAL PARTICLES, many people purchase the exact amount and don't have enough to clean out the prior fluid's mess.
Also last LAST tip, you must put the vehicle into service mode to internally bleed certain components (it gives 5 options for which components are being replaced), as bleeding solely by driving and shifting can only do so much for a self bleeding service.
OK, have fun and make sure you don't cheap out on anything.
I used
NGK SPARK PLUGS
OEM COOLANT
MOBIL OIL FOR (0W-20) ENGINE AND (75W-90) DIFFERENTIAL SYTHETICS
REDLINE D6 ATF FOR TRANSMISSION
24 11 5 A13 115 ZF OE TRANSMISSION PAN FILTER
DOT 4 OE BRAKE FLUID
It's not too bad once you get used it, these cars are sensitive but, workhorses IF you maintain them properly.

 

[Ytsejam]

Motul 300 75W90 has two versions, the regular 300 (105777) and the 300 LS (105778). Which one do we use?

Motul's website recommends the 300 LS for the Supra. However, the 300 LS is a GL5 while the regular 300 is GL4/GL5.

Is anyone more familiar with fluid API standards able to answer this question? Both fluids are GL-5 rated so I assume either will be okay, but are the extra ratings on the GEAR 300 (non LS) beneficial?

 

[Hasan]

Is anyone more familiar with fluid API standards able to answer this question? Both fluids are GL-5 rated so I assume either will be okay, but are the extra ratings on the GEAR 300 (non LS) beneficial?

I am guessing the "MIL" would be a military specification. Possibly a higher change interval.

 

[FLtrackdays]

I am guessing the "MIL" would be a military specification. Possibly a higher change interval.

Yup. It’s U.S. military specs for gear lubricants. So they can meet certain performance requirements set by the military, allowing them to sell to a bigger market, as long as the testing is done. Smart on their part.

 

[FuzzyRev]

Is anyone more familiar with fluid API standards able to answer this question? Both fluids are GL-5 rated so I assume either will be okay, but are the extra ratings on the GEAR 300 (non LS) beneficial?

The extra specs on the NON-LS aren't beneficial for your diff, and generally the LS additive is never a bad thing to have in any differential with a clutch pack (whether dynamically or electronically activated). Plus, the GL-4 rating on the NON-LS points to it having less Extreme Pressure additives, which is definitely a negative. If it were me, I'd use the 300 LS.

 

[dustwhyn]

Motul Gear 300 75w90 or Liqui moly you linked. Don’t pay $80 for oem, that’s insanity. Especially since it actually costs $45.

@concept got taken for a ride.

Do you run the LS or regular version? I’m swapping the diff on my M340i to the shorter 3.15 final drive out of a Supra and I can’t find the OEM G4 fluid in stock anywhere, so I’m trying to find a suitable replacement that doesn’t clunk when it’s cold like my Redline did in my factory diff. Pretty sure I used 75W-110, which probably contributed to the cold clunk but I wanna avoid that this time.

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