Red Line Oil 75W90NS GL-5 GEAR OIL for AMG GT transaxles
Thread Starter
Senior Member
Joined: Feb 2016
Posts: 260
Likes: 166
From: Canada
AMG GT-S, AMG C43, Ferrari Roma, Maserati MC20, Genesis GV70 Electrified
Red Line Oil 75W90NS GL-5 GEAR OIL for AMG GT transaxles
I made an inquiry to Red Line Oil about a suitable fluid for the transaxle in my AMG GT-S, as the Shell Spirax S5 ATE 75W-90 is impossible to find where I live, and I am not wanting to import it from oversees. There are currently two different ones recommended for the car on their site, so I asked which of the two was the right one. Here is the nice response I got one day later:
"Thank you for contacting Red Line Oil, in the gear portion of your transaxle the 75W90NS would be recommended, a suitable replacement for the 236.26 fluid. I will adjust the mapping, thanks for bringing it to my attention.
Regards,
Dave Granquist"
Here is the listing of OEM compatibility from their site:
RED LINE 75W90NS HIGH-PERFORMANCE GEAR OIL is a fully-synthetic formula with ester base stocks, designed for use in manual transmissions and transaxles that require GL-5 lubricants. This non-slip formula is formulated for shear stability, less gear noise and consistent viscosity. Extreme pressure (EP) additives allow for use with hypoid gears, but the lack of friction modifiers causes less slipperiness for proper synchronizer operations. Friction modifier can be added or used to customize limited-slip differential operation.
Suitable replacement for:
Alfa Romeo
Agip 75W-90 SX
Agip SXA 75W-90
Dodge/Jeep 4549636
Ferrari 75W90
GM 88862475
GM 88862476
Mobil Mobilube 75W-90 SHC
Mobil Delvac 75W-90
Mobil Mobilube PTX 75W-90
Porsche 000 043 204 19
Porsche 000 043 204 71
Porsche 000 043 210 12
Porsche 000 043 304 71
Porsche 000 043 305 00
Porsche 000 043 305 48
Porsche Mobilube PTX
Porsche N-052-911-CO
Porsche SHC 75W90
Spirax S5 ATE
Shell Spirax EP 90
Shell Transaxle Oil 75W-90
Shell Spirax S5 ATE 75W-90
Shell TF 1055
Subaru SOA635011
T-10/Top Loader/Muncie
"Thank you for contacting Red Line Oil, in the gear portion of your transaxle the 75W90NS would be recommended, a suitable replacement for the 236.26 fluid. I will adjust the mapping, thanks for bringing it to my attention.
Regards,
Dave Granquist"
Here is the listing of OEM compatibility from their site:
RED LINE 75W90NS HIGH-PERFORMANCE GEAR OIL is a fully-synthetic formula with ester base stocks, designed for use in manual transmissions and transaxles that require GL-5 lubricants. This non-slip formula is formulated for shear stability, less gear noise and consistent viscosity. Extreme pressure (EP) additives allow for use with hypoid gears, but the lack of friction modifiers causes less slipperiness for proper synchronizer operations. Friction modifier can be added or used to customize limited-slip differential operation.
Suitable replacement for:
Alfa Romeo
Agip 75W-90 SX
Agip SXA 75W-90
Dodge/Jeep 4549636
Ferrari 75W90
GM 88862475
GM 88862476
Mobil Mobilube 75W-90 SHC
Mobil Delvac 75W-90
Mobil Mobilube PTX 75W-90
Porsche 000 043 204 19
Porsche 000 043 204 71
Porsche 000 043 210 12
Porsche 000 043 304 71
Porsche 000 043 305 00
Porsche 000 043 305 48
Porsche Mobilube PTX
Porsche N-052-911-CO
Porsche SHC 75W90
Spirax S5 ATE
Shell Spirax EP 90
Shell Transaxle Oil 75W-90
Shell Spirax S5 ATE 75W-90
Shell TF 1055
Subaru SOA635011
T-10/Top Loader/Muncie
MBWorld Fanatic!
Joined: Jun 2019
Posts: 1,013
Likes: 194
C190
One caveat about using Redline 75W-90NS might be when using it for the base GT that has a mechanical limited slip differential. I honestly don’t know what is required, I’m not an expert. Redline’s recommendation specifically says it does not have the friction modifiers required for a mechanical limited slip differential. I guess one would have to add it in manually?
Thread Starter
Senior Member
Joined: Feb 2016
Posts: 260
Likes: 166
From: Canada
AMG GT-S, AMG C43, Ferrari Roma, Maserati MC20, Genesis GV70 Electrified
I got a reply from Red Line when I inquired about the need for any friction modifier for the AMG GT-S:"In your AMG transaxle gearset the 75W90NS is recommended, a suitable replacement for the Spirax S5 ATE 75W-90.
The 75W90NS is designed with the proper coefficient of friction for the synchros, you shouldn’t need to add any friction modifier and it’s use could adversely impact shiftability."
So the fluid straight out of the bottle is the recommended fill. Not sure about the AMG GT with the mechanical LSD.
The 75W90NS is designed with the proper coefficient of friction for the synchros, you shouldn’t need to add any friction modifier and it’s use could adversely impact shiftability."
So the fluid straight out of the bottle is the recommended fill. Not sure about the AMG GT with the mechanical LSD.
