Trans/Rear Diff oil recommendations...

DannyGT · 10-23-2010, 03:17 AM

I think I'm going with Motul Gear 300 for the trans and rear diff fluid...good, bad? What do you guys think, anything I should be worried about?

djpathfinder · 10-23-2010, 03:57 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, 08:22 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, 09:38 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.

diablokev87 · 10-28-2010, 01:39 AM

sub

1slow370 · 10-28-2010, 05:19 AM

for diff it doesn't matter unless you have a clutch LSD in it(in which case use he oil provided) anything synthetic is fine gear oil is tough stuff and unless you track everyday it doesn't matter for the most part.

Zat_Zuma · 10-28-2010, 10:33 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, 12:38 PM

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

ROC1ROB · 10-31-2010, 10:59 AM

I did the Motul in the diff of my G35 and in cold weather it's embarrassing to drive until it warms up. After a couple of miles it quiets down, so you can't even warm up the car at first to get rid of it. My

tranceformer · 10-31-2010, 01:34 PM

AMSOIL 75w90 trans fluid for the trans
AMSOIL 80w90 gear lube for the diff

xbigb4ller69z · 10-31-2010, 06:53 PM

I'm going with GTM's tt kit, is this something that I should change as well? or not really???

djpathfinder · 10-31-2010, 08:05 PM

Shouldn't matter whether or not you go with forced induction. I did it way ahead of schedule (10 000 km = 6200 miles) just to get good quality synthetic fluids in there.

docaam · 11-08-2010, 01:51 AM

Quote:

Originally Posted by djpathfinder

Shouldn't matter whether or not you go with forced induction. I did it way ahead of schedule (10 000 km = 6200 miles) just to get good quality synthetic fluids in there.

you mean you changed the diff and tran oil on 10k km?

ChrisSlicks · 11-08-2010, 08:05 AM

Quote:

Originally Posted by docaam

you mean you changed the diff and tran oil on 10k km?

I changed mine at about the same mark to put something in them better for the track. The oil from the transmission came out looking like new, the oil from the diff was dark and dirty and the drain magnet was covered in metallic sludge. So if you drive with high diff temperatures I would change the diff fluid every other oil change until it started looking better. The first change is always going to look the worst because of break in.

docaam · 11-09-2010, 01:27 AM

Quote:

Originally Posted by ChrisSlicks

I changed mine at about the same mark to put something in them better for the track. The oil from the transmission came out looking like new, the oil from the diff was dark and dirty and the drain magnet was covered in metallic sludge. So if you drive with high diff temperatures I would change the diff fluid every other oil change until it started looking better. The first change is always going to look the worst because of break in.

Thanks for the info....I will open up mine as well then

10-23-2010, 03:17 AM	#1 (permalink)
DannyGT Track Member Join Date: Jan 2009 Location: Jersey Posts: 919 Drives: 370Z (SOLD) Rep Power: 279	Trans/Rear Diff oil recommendations... I think I'm going with Motul Gear 300 for the trans and rear diff fluid...good, bad? What do you guys think, anything I should be worried about? __________________ Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)

10-23-2010, 03:57 AM	#2 (permalink)
djpathfinder A True Z Fanatic Join Date: Mar 2010 Location: Edmonton, Canada Posts: 12,910 Drives: 2012 GT-R BE Rep Power: 733	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 04:02 AM.

10-23-2010, 09:38 AM	#4 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	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 09:40 AM.

10-28-2010, 01:39 AM	#5 (permalink)
diablokev87 Base Member Join Date: Aug 2009 Location: Queens NY Posts: 246 Drives: 09 Niss 370Z Blue A7 Rep Power: 16	sub __________________ 2009 370z (AT7): Gen3 \| HKS Hi Power \| Z120BT \| Animated Foglight \| 590.2x 1999 Maxima SE (MT5): Nada (so far)

10-28-2010, 05:19 AM	#6 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	for diff it doesn't matter unless you have a clutch LSD in it(in which case use he oil provided) anything synthetic is fine gear oil is tough stuff and unless you track everyday it doesn't matter for the most part. __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

10-28-2010, 12:38 PM	#8 (permalink)
Seb@SZ Enthusiast Member Join Date: Jan 2010 Location: Chatsworth Posts: 277 Drives: Zs Rep Power: 24	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/

10-31-2010, 10:59 AM	#9 (permalink)
ROC1ROB Base Member Join Date: May 2010 Location: AZ Posts: 201 Drives: 09 MT BS Base/Sports Rep Power: 15	I did the Motul in the diff of my G35 and in cold weather it's embarrassing to drive until it warms up. After a couple of miles it quiets down, so you can't even warm up the car at first to get rid of it. My

10-31-2010, 01:34 PM	#10 (permalink)
tranceformer A True Z Fanatic Join Date: Nov 2008 Location: Palm Beach, FL Posts: 1,213 Drives: 2009 370Z PW 6MT Rep Power: 268	AMSOIL 75w90 trans fluid for the trans AMSOIL 80w90 gear lube for the diff __________________ Ray 2009 370Z Base Sport 6MT / 12.860 @ 109.09mph / 1.921 60ft / street tires official 1/4 mile track times

10-31-2010, 06:53 PM	#11 (permalink)
xbigb4ller69z Enthusiast Member Join Date: Mar 2010 Location: Orlando, Fl Posts: 261 Drives: 2010 370z 40th ANNIV Rep Power: 15	I'm going with GTM's tt kit, is this something that I should change as well? or not really??? __________________ Eibach pro kit/ Stillen sway bars / SPC rear camber arms / F.I. 12" CBE / GTM TT / Southbend clutch stg 3 / ProSport Gauges/ ZSpeed Performance Heavy Duty Concentric Slave Cylinder / Twin Oil Coolers. / Tuned by HP Logic

10-31-2010, 08:05 PM	#12 (permalink)
djpathfinder A True Z Fanatic Join Date: Mar 2010 Location: Edmonton, Canada Posts: 12,910 Drives: 2012 GT-R BE Rep Power: 733	Shouldn't matter whether or not you go with forced induction. I did it way ahead of schedule (10 000 km = 6200 miles) just to get good quality synthetic fluids in there. __________________ 2012 GT-R Black Edition Jet Black 2010 370Z 40th Anniversary // SOLD

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