Rear diff and front diff fluid type.
Thread Starter
10th Gear
Joined: Feb 2023
Posts: 10
Likes: 1
From: Canada
Rear diff and front diff fluid type.
Hi all
i got a 2009 lexus rx350 and im not sure what type of fluid it takes in the rear and front diff
the front diff the drain plug says 85w90 i did find a bottle its from liq molly but doesnt say if its syth or not
Every auto store i look at they say 75w90 is it safe to put that in?? Its fully syth
i got a 2009 lexus rx350 and im not sure what type of fluid it takes in the rear and front diff
the front diff the drain plug says 85w90 i did find a bottle its from liq molly but doesnt say if its syth or not
Every auto store i look at they say 75w90 is it safe to put that in?? Its fully syth
Thread Starter
10th Gear
Joined: Feb 2023
Posts: 10
Likes: 1
From: Canada
I dont think the 85w90 is syn
And i would like it to be syn so im gonna use the 75w90
Pole Position
Joined: Jan 2021
Posts: 2,211
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From: Ontario
1+ synthetic for sure! I have run syn DEX 6 in my power steering for years and it comes out cleaner too. Less resistance and noise from the system on cold starts too. Probably benefits us Canadians more than most where it gets colder. The original diff oil was pretty thick and didn't flow well when I tried to drain it cold.
Thread Starter
10th Gear
Joined: Feb 2023
Posts: 10
Likes: 1
From: Canada
1+ synthetic for sure! I have run syn DEX 6 in my power steering for years and it comes out cleaner too. Less resistance and noise from the system on cold starts too. Probably benefits us Canadians more than most where it gets colder. The original diff oil was pretty thick and didn't flow well when I tried to drain it cold.
Thread Starter
10th Gear
Joined: Feb 2023
Posts: 10
Likes: 1
From: Canada
do i need redline 75w90 NS or just the regular 75w90 it gives me to options.
Pole Position
Joined: Jan 2021
Posts: 2,211
Likes: 1,109
From: Ontario
I used regular Redline. NS “Non-Slip” is mainly for manual trannys to slow down synchros, it doesn’t have the friction modifiers the regular stuff has. However, I bet it would still work great in our diffs or t-cases.
Last edited by MattRX; Feb 22, 2023 at 08:13 AM.
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Thread Starter
10th Gear
Joined: Feb 2023
Posts: 10
Likes: 1
From: Canada
thank you I ended up getting
redline 75w90 NS (non lsd) full synthetic
due to supply i couldn't find the normal redline 75w90
hopefully the redline 75w90 NS full synthetic doesn't cause an issues.
from my understanding the car does not have LSD so should be fine. we will see lol...
thx for the help mate.
redline 75w90 NS (non lsd) full synthetic
due to supply i couldn't find the normal redline 75w90
hopefully the redline 75w90 NS full synthetic doesn't cause an issues.
from my understanding the car does not have LSD so should be fine. we will see lol...
thx for the help mate.
Pole Position
Joined: Jan 2021
Posts: 2,211
Likes: 1,109
From: Ontario
Should be fine. These cars never had LSDs, but a 99-00 RX300 limited slip rear diff can be fitted. That’s a mechanical (Torsen T2) diff, so it still doesn’t require LSD oil as there are no clutch packs.
I just checked my Amazon history and I did actually accidentally get NS and put it in over a year ago in my t-case. It has been a lot smoother than the original black, burned fluid and is as quiet as can be. I wouldn’t worry about running NS in our cars.
I just checked my Amazon history and I did actually accidentally get NS and put it in over a year ago in my t-case. It has been a lot smoother than the original black, burned fluid and is as quiet as can be. I wouldn’t worry about running NS in our cars.
Thread Starter
10th Gear
Joined: Feb 2023
Posts: 10
Likes: 1
From: Canada
Should be fine. These cars never had LSDs, but a 99-00 RX300 limited slip rear diff can be fitted. That’s a mechanical (Torsen T2) diff, so it still doesn’t require LSD oil as there are no clutch packs.
I just checked my Amazon history and I did actually accidentally get NS and put it in over a year ago in my t-case. It has been a lot smoother than the original black, burned fluid and is as quiet as can be. I wouldn’t worry about running NS in our cars.
I just checked my Amazon history and I did actually accidentally get NS and put it in over a year ago in my t-case. It has been a lot smoother than the original black, burned fluid and is as quiet as can be. I wouldn’t worry about running NS in our cars.
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