Looking to change my trans and diff fluid soon, what your guy's go-to and why?

[Hurricane Nate]

Originally Posted by misterfly

Im seraching the best one in 75-85 for the diff , for the trans i will take motul but motul dont do 75w-85 , what guy use in 2017 + ?

I plan on putting Motul 300 in both Trans and Diff soon for my 2020 BRZ

Also, the Motul website has links to where you can buy stuff for less than $20 bucks per 1L bottle.

https://www.motul.com/us/en/products/gear-300-75w90

Just click on the Buy online link and it'll pop a few sites. Currently Bimmers.com has it for $13.95 a bottle.

[covance]

In October 2022 Motul seems sold out everywhere. I spoke to 86speed customer service and they said it is backordered until 2023.

I have a 2015 BRZ 6MT - can I just buy 4 bottles of this and change both the transmission and rear differential fluids with it?

https://parts.stohlmansubaru.com/p/S...A427V1700.html

Genuine Subaru Certified High Performance Gear Oil SAE 75W 90, 1 Quart Bottle. Quantity Required: 2.3.
Part Number: SOA427V1700

This is my first time changing these fluids, after owning the car since end of 2014 and 40k street miles. I don't do track days, just spirited street driving.

Also, anyone happen to have the correct Subaru part numbers for all necessary washers/gaskets? I have had trouble finding those.

Thanks in advance!

[RToyo86]

Originally Posted by covance

Also, anyone happen to have the correct Subaru part numbers for all necessary washers/gaskets? I have had trouble finding those.

Thanks in advance!

There's a thread somewhere with info but I saved it for my self.




Subaru
1215710010 Diff Drain Gasket
11126JB000 Diff Fill Gasket
17008AA050 Transmission Gaskets
803916010 Oil Drain Gasket

Toyota
TOY1215710010 Diff Drain Gasket
SU00300122 Diff Fill Gasket
SU00303626 Transmission Gaskets
SU00302159 Oil Drain Gasket

[covance]

Originally Posted by RToyo86

There's a thread somewhere with info but I saved it for my self.



Subaru
1215710010 Diff Drain Gasket
11126JB000 Diff Fill Gasket
17008AA050 Transmission Gaskets
803916010 Oil Drain Gasket

Toyota
TOY1215710010 Diff Drain Gasket
SU00300122 Diff Fill Gasket
SU00303626 Transmission Gaskets
SU00302159 Oil Drain Gasket

Thank you! Any opinion on the link to the oil?

[NoHaveMSG]

Originally Posted by covance

Thank you! Any opinion on the link to the oil?

If you can't find Motul, why not just run Redline? I have beating on my car for years with it. You can find 75w90 gear and Mt-90 at most box stores. I actually like the MT-90 more then the Motul, I think it shifts nicer and it's easy to get.

[Ultramaroon]

+1 for Redline

[LancePower]

I've also have both Motul and Redline in this platform and prefer the Redline.

[e_lunatic]

I use Lucas Oil for trans and diff. We used it in the drift cars for a long time and its been perfect in my personal car as well. +1 for being able to find it at your local parts store as well.


that being said it's very clear you can't go wrong with Motul and Redline

[warhawk03]

With Red Line's products, am I understanding this correctly?

For the transmission, MT-90 is 75w90 GL-4, which meets the specifications set by the OEM.

For the differential, both 75w90 and 75w90NS are GL-5, which meets the specifications set by the OEM. However, the 75w90NS doesn't have the friction modifiers, which is ideal for the hypoid gear (non clutch-type) differential that's in the car.

So, MT-90 for the transmission and 75w90NS GL-5 gear oil for the differential?

If I've got this wrong, let me know so I don't confuse any other newbies.

[NoHaveMSG]

Originally Posted by warhawk03

With Red Line's products, am I understanding this correctly?

For the transmission, MT-90 is 75w90 GL-4, which meets the specifications set by the OEM.

For the differential, both 75w90 and 75w90NS are GL-5, which meets the specifications set by the OEM. However, the 75w90NS doesn't have the friction modifiers, which is ideal for the hypoid gear (non clutch-type) differential that's in the car.

So, MT-90 for the transmission and 75w90NS GL-5 gear oil for the differential?

If I've got this wrong, let me know so I don't confuse any other newbies.

Either would be fine. I've been using the regular 75-90. This is really only important if you have a clutch LSD.

[Drummerkurt71!]

I have a 2015 FR-S
1.0 I think it's called. It's 1109 of 1500 made. TRD package on it.
At 100 k miles I figured it's time to change the transmission fluid and rear diff fluid. Besides it's getting harder to shift.
I put 75w-140 oil in it (because I had some). now i's harder to shift than before. I want to drain and fill it again with proper oil, but I want quality oil.
Something that will help it shift smoother than it used to.
What kind of oil do you recommend for it? For the transmission and diff?
I found Redline MT-90 on Amazon. But I also hear you guys talk about Amsoil, and / or Motul 300.
And for the DiffGL-5) 75w90 NON-LIMITED SLIP? (what brand)
A little confused. I drive the car pretty hard, like stole it! Hard corners and high freeway speeds.

I also have problem wi tire squirm; anybody heard of that?
This is my first post
Anything helps, Thank you very much!

[r4mr4m3024]

I can't find the original gaskets. I found these replacement gaskets for the transmission and differential. Is this correct?

A ABSOPRO 12 pieces car oil drain screws seal 12157-10010 for Toyota Corolla https://amzn.eu/d/duyZD2A

[Griever423]

I just had my trans and diff fluid flushed and replaced with Redline. Man what a difference the MT-90 made in smoothness. Highly recommended.