Gear Oil Question
#1
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Gear Oil Question
I'm getting ready to replace all three (front, center/transfer, rear) differential fluids and would like a clarification on the oil type. I'm planning to use Mobile 1 75W90 synthetic, but there is a regular version and a LS (Limited Slip) version. My question is should I put LS version on all three, just the rear or just the front and rear? Thanks.
#2
Pole Position
I'm getting ready to replace all three (front, center/transfer, rear) differential fluids and would like a clarification on the oil type. I'm planning to use Mobile 1 75W90 synthetic, but there is a regular version and a LS (Limited Slip) version. My question is should I put LS version on all three, just the rear or just the front and rear? Thanks.
#6
Pole Position
You should be using the regular version, not the LS version with the friction modifier the LSD clutch packs need. I'm sure it won't harm anything using the LS version, but that's not what you should be using.
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#8
Pole Position
^^Does that indicate that LSD was an option on the GX470?!?^^
#9
Lexus Champion
Nope, our GXs did not come with LSDs and it was never an option:
http://www.lexus.com/contact/pdf/2005/2005GXspecs.pdf
(change the year in the link above to see different years)
The center diff uses a torsen type limited slip. The front / rear diffs uses ATRAC that uses the brakes to act like a limited slip. As you can see below there are no clutch plates in either the front or rear diff so we do NOT have LSDs.
Front Diff
Rear Diff
http://www.lexus.com/contact/pdf/2005/2005GXspecs.pdf
(change the year in the link above to see different years)
The center diff uses a torsen type limited slip. The front / rear diffs uses ATRAC that uses the brakes to act like a limited slip. As you can see below there are no clutch plates in either the front or rear diff so we do NOT have LSDs.
Front Diff
Rear Diff
#11
Pole Position
Nope, our GXs did not come with LSDs and it was never an option:
http://www.lexus.com/contact/pdf/2005/2005GXspecs.pdf
(change the year in the link above to see different years)
The center diff uses a torsen type limited slip. The front / rear diffs uses ATRAC that uses the brakes to act like a limited slip. As you can see below there are no clutch plates in either the front or rear diff so we do NOT have LSDs.
http://www.lexus.com/contact/pdf/2005/2005GXspecs.pdf
(change the year in the link above to see different years)
The center diff uses a torsen type limited slip. The front / rear diffs uses ATRAC that uses the brakes to act like a limited slip. As you can see below there are no clutch plates in either the front or rear diff so we do NOT have LSDs.
#12
I bought 7 bottles of Mobil Synthetic gear lube with LS (limited slip) LS 75W 90 bit messy job, so there was some spill.
I USED THE SAME OIL ON FRONT DIFF, REAR DIFF, AND TRANSFER CASE. 2004 GX. (RC OR mann777, AM I OK DOING THIS?)
Check out MANN777 link, he covers front and back diff. The transfer case is not included in the link but very easy to do.
https://www.clublexus.com/forums/gx-...-tutorial.html
I USED THE SAME OIL ON FRONT DIFF, REAR DIFF, AND TRANSFER CASE. 2004 GX. (RC OR mann777, AM I OK DOING THIS?)
Check out MANN777 link, he covers front and back diff. The transfer case is not included in the link but very easy to do.
https://www.clublexus.com/forums/gx-...-tutorial.html
Last edited by gxman1; 11-20-13 at 09:11 AM.
#13
Lexus Champion
You'll need 7 quarts total:
It's not GX specific, or I should say the picture of the LSD sticker isn't. It's saying that's how you tell in general on a Lexus / Toyota if the rear diff has a LSD. In the Tundra shop book it shows the exact same picture.
There's no LSD for our GX, our GX uses ATRAC (uses the brakes) as a limited slip for the front and rear diffs.
I'm using Amsoil 75w90 severe gear and it says it's safe for open diffs and LSDs. It says if you have an LSD and you heard clutch chatter to add one of their friction modifiers.
As long as it's a Hypoid / API GL-5 oil (that's exactly what it shows in the shop manual for the front / rear diff and transfer case) you're fine using it and on Mobil 1's site it says:
"Mobil 1 Synthetic gear Lubricant LS 75W-90 is intended for initial fill, topping-off or refilling differentials, final drives, transfer cases and other gear applications where lubricants meeting API Service GL-5 and multi-purpose or mild EP gear lubricants are recommended"
LINK ---> http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil1_Synthetic_Gear_Lubricant_LS_75W-90.aspx
- Front Diff: 1.5qt.
- Transfer Case: 1.5qt.
- Rear Diff: 3.15qt.
There's no LSD for our GX, our GX uses ATRAC (uses the brakes) as a limited slip for the front and rear diffs.
I bought 7 bottles of Mobil Synthetic gear lube with LS (limited slip) LS 75W 90 bit messy job, so there was some spill.
I USED THE SAME OIL ON FRONT DIFF, REAR DIFF, AND TRANSFER CASE. 2004 GX. (RC OR mann777, AM I OK DOING THIS?)
Check out MANN777 link, he covers front and back diff. The transfer case is not included in the link but very easy to do.
https://www.clublexus.com/forums/gx-...-tutorial.html
I USED THE SAME OIL ON FRONT DIFF, REAR DIFF, AND TRANSFER CASE. 2004 GX. (RC OR mann777, AM I OK DOING THIS?)
Check out MANN777 link, he covers front and back diff. The transfer case is not included in the link but very easy to do.
https://www.clublexus.com/forums/gx-...-tutorial.html
As long as it's a Hypoid / API GL-5 oil (that's exactly what it shows in the shop manual for the front / rear diff and transfer case) you're fine using it and on Mobil 1's site it says:
"Mobil 1 Synthetic gear Lubricant LS 75W-90 is intended for initial fill, topping-off or refilling differentials, final drives, transfer cases and other gear applications where lubricants meeting API Service GL-5 and multi-purpose or mild EP gear lubricants are recommended"
LINK ---> http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil1_Synthetic_Gear_Lubricant_LS_75W-90.aspx
#15
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Thanks everyone. Great information. Mann777, I was able to find the doc you noted after I posted my question. Looks like Lexus changed the fluids to synthetic beginning MY 2008. However, at around $50 quart, I will stick with Mobile1!