Trans/Rear Diff oil recommendations...

djpathfinder · 10-23-2010, 02:57 AM

I just changed my fluids. I used Redline MT-L and MT-90 (1:1 mix) for the MT tranny and Amsoil 75W90 synthetic gear oil for the diff. So long as you use some quality stuff you'll be fine.

wheee! · 10-23-2010, 07:22 AM

Quote:

Originally Posted by djpathfinder

I just changed my fluids. I used Redline MT-L and MT-90 (1:1 mix) for the MT tranny and Amsoil 75W90 synthetic gear oil for the diff. So long as you use some quality stuff you'll be fine.

Hey DJ! What a good choice of fluids! I did the same and the results have been very good. Nice smooth performance and peace of mind....

A very smart man already posted the following info:

Engine:

Amsoil 5W30 full synthetic (ester rated) oil

K & N oil filter (HP1008)

Filter-Mag (SS250)

Drain plug crush washer (PB147)
Report

Differential:

Amsoil 75W90 synthetic gear lube. You'll need two litres to do this change.

Manual transmission fluid change:

You'll need a total of four litres to do this change. You need to mix the two different fluids to get the recommended viscosity for the transmission.

Red-Line MTL (50204)
Red-Line MT90 (50304)

Amsoil hand transfer pump (G2039)

drain and fill plug washers for the manual transmission and differential. These are available at any Nissan dealership (Cost is around $3.00 each and you'll need a total of four for both changes.) Part number is 11026-4N200.

ChrisSlicks · 10-23-2010, 08:38 AM

Generally speaking you shouldn't use GL-5 oils in the manual transmission (in the diff is fine). They contain pressure additives such as sulfur than can cause corrosion of the brass components, and are sometimes too slippery for proper syncro engagement. This Motul formulation might be okay, you should do some research.

Personally I was just do the diff right now (it gets nasty quickly) and do the transmission when you can get your hands on the new Redline MT-85.

Zat_Zuma · 10-28-2010, 09:33 AM

Quote:

Originally Posted by ChrisSlicks

Generally speaking you shouldn't use GL-5 oils in the manual transmission (in the diff is fine). They contain pressure additives such as sulfur than can cause corrosion of the brass components, and are sometimes too slippery for proper syncro engagement. This Motul formulation might be okay, you should do some research.

Personally I was just do the diff right now (it gets nasty quickly) and do the transmission when you can get your hands on the new Redline MT-85.

From what I understand most GL-5 rated gear oils are backwards compatible to a GL-4 rating. But you are right, in watching out for sulphur based additives, as they are not yellow metal (brass/copper) friendly.
One ASTM test to look for, on a gear oil, is the corrosion test with a result of 1 or less.

FYI my choice of gear oil is Shell Spirax synthetic 75W90 gear oil. I've been using it for 5 years now on all my vehicles, with great success.

Seb@SZ · 10-28-2010, 11:38 AM

Redline MT-85 GL-4 for the trans

Lubro Moly Gear Oil Syn 75w-90 GL-5 Diff
or
Richmond Gear Oil Syn 75w-140 GL-6 Diff

ZoomZ · 05-16-2024, 10:49 AM

Quote:

Originally Posted by djpathfinder

I just changed my fluids. I used Redline MT-L and MT-90 (1:1 mix) for the MT tranny and Amsoil 75W90 synthetic gear oil for the diff. So long as you use some quality stuff you'll be fine.

What is your observed improvement/difference in your 1:1 mix vs. MT-85 alone, as called for by Redline?

ZZ

10-23-2010, 02:57 AM	#1 (permalink)
djpathfinder A True Z Fanatic Join Date: Mar 2010 Location: Edmonton, Canada Posts: 12,910 Drives: 2012 GT-R BE Rep Power: 735	I just changed my fluids. I used Redline MT-L and MT-90 (1:1 mix) for the MT tranny and Amsoil 75W90 synthetic gear oil for the diff. So long as you use some quality stuff you'll be fine. __________________ 2012 GT-R Black Edition Jet Black 2010 370Z 40th Anniversary // SOLD Last edited by djpathfinder; 10-23-2010 at 03:02 AM.

10-23-2010, 08:38 AM	#3 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 655	Generally speaking you shouldn't use GL-5 oils in the manual transmission (in the diff is fine). They contain pressure additives such as sulfur than can cause corrosion of the brass components, and are sometimes too slippery for proper syncro engagement. This Motul formulation might be okay, you should do some research. Personally I was just do the diff right now (it gets nasty quickly) and do the transmission when you can get your hands on the new Redline MT-85. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms Last edited by ChrisSlicks; 10-23-2010 at 08:40 AM.

10-28-2010, 11:38 AM	#5 (permalink)
Seb@SZ Enthusiast Member Join Date: Jan 2010 Location: Chatsworth Posts: 277 Drives: Zs Rep Power: 26	Redline MT-85 GL-4 for the trans Lubro Moly Gear Oil Syn 75w-90 GL-5 Diff or Richmond Gear Oil Syn 75w-140 GL-6 Diff __________________ Z Car Specialists www.specialtyz.com Blog http://specialtyz.com/blog/

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