Manual transmission fluid change

ChrisSlicks · 06-02-2011, 07:01 AM

The gear oil viscosity scale is different, so 5W30 is actually pretty close to 75W90. They probably did this on purpose to prevent people from trying to stick engine oil in their transmission and vice versa. I've had good results with Redline MT-85.

TongMan · 06-02-2011, 08:57 AM

so, 5w30 is actually 75w90??

tranceformer · 06-02-2011, 09:13 AM

According to the specs on the Amsoil site, they were quite different in viscosity.

TongMan · 06-02-2011, 09:52 AM

Red Line MT-85 Manual Transmission Fluid 1 Quart - 370Z - performance parts

Quote:

Description: Recommended for Nissan 350Z, 370Z, G35, and G37 (also most Maxima, Altima & Sentra).
* Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage
* Offers quicker shifts, perfect synchronizer coefficient of friction * Eliminates notchy shifting, even when cold
* High performance gear protection and longer synchro life
* Recommended for GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified
* Satisfies the gear oil viscosity requirements of 75W, 80W, 85W and motor oil viscosities of SAE 30 and 5W30.

Includes 1 Quart, 4 are required to complete the Job

ChrisSlicks · 06-02-2011, 10:30 AM

Quote:

Originally Posted by TongMan

so, 5w30 is actually 75w90??

The viscosities are essentially the same yes, but the formulation and additives are a little different. Gear oil has shock additives to help cushion the gears as they come together and additives to help the synchro's grip more easily (limit the slipperiness of the fluid).

TongMan · 06-03-2011, 09:39 AM

also confirming that we need 4 quarts for our 370z?

ChrisSlicks · 06-03-2011, 09:47 AM

Quote:

Originally Posted by TongMan

also confirming that we need 4 quarts for our 370z?

No, the MT only needs 2.5 quarts (2.83 L).

TongMan · 06-03-2011, 09:52 AM

oh ok. The link I gave about stated we needed 4 quarts. Weird.

ChrisSlicks · 06-03-2011, 10:49 AM

If you were doing a flush maybe, but 2 was plenty when I did mine. Just make sure the car is nice and level so that you get an accurate fill.

Zappypants · 06-03-2011, 07:04 PM

My 06 Z had the world's notchiest transmission ever. After 3K miles, I switched to Redline MT-90 (if memory serves) and couldn't believe the difference. Going with MT-85 when I do my next oil change (I mean hey, I'll be under there anyway, right?)

AlphaSnacks · 06-03-2011, 07:32 PM

What does a typical tranny fluid change run? Is it as quick and simple as a standard oil change on our cars?

Edit: NM. Pretty damn easy on this car. Drain plug underneath. Refill plug on the side of the tranny.

Zappypants · 06-03-2011, 07:41 PM

Spearfish25 has an excellent DIY: DIY: Transmission Oil Change

It's easier, IMO, than a oil change, with the exception that you'll need a pump for the new fluid. No idea what the cost would be, sorry, but if you provided the oil I can't imagine it being too much at all.

Carbon_z · 06-07-2011, 04:37 AM

whats everybody changing their tranny oil at???

ALSO, anybody forced to change their clutch yet? Trying to figure out some future planning lol

wheee! · 06-07-2011, 09:58 AM

Did ALL the fluids with synthetics (except brakes and clutch) at 5000kms. The diff was especially gross from the factory setup. Tranny looked like new, but wanted better.

ChrisSlicks · 06-07-2011, 10:04 AM

I changed my transmission fluid at about 7000 miles, the fluid still looked brand new. The diff on the other hand was a nasty smelly mess.

06-02-2011, 07:01 AM	#16 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	The gear oil viscosity scale is different, so 5W30 is actually pretty close to 75W90. They probably did this on purpose to prevent people from trying to stick engine oil in their transmission and vice versa. I've had good results with 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

06-02-2011, 09:13 AM	#18 (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	According to the specs on the Amsoil site, they were quite different in viscosity. __________________ Ray 2009 370Z Base Sport 6MT / 12.860 @ 109.09mph / 1.921 60ft / street tires official 1/4 mile track times

06-03-2011, 10:49 AM	#24 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	If you were doing a flush maybe, but 2 was plenty when I did mine. Just make sure the car is nice and level so that you get an accurate fill. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

06-03-2011, 07:32 PM	#26 (permalink)
AlphaSnacks A True Z Fanatic Join Date: Jan 2010 Location: Windermere, FL Posts: 1,618 Drives: '13 XKR-S, '10 370Z Rep Power: 18	What does a typical tranny fluid change run? Is it as quick and simple as a standard oil change on our cars? Edit: NM. Pretty damn easy on this car. Drain plug underneath. Refill plug on the side of the tranny. Last edited by AlphaSnacks; 06-03-2011 at 07:35 PM.

06-07-2011, 04:37 AM	#28 (permalink)
Carbon_z A True Z Fanatic Join Date: Sep 2009 Location: Atlanta, GA Posts: 1,694 Drives: Carbon Fiber 370z Rep Power: 19	whats everybody changing their tranny oil at??? ALSO, anybody forced to change their clutch yet? Trying to figure out some future planning lol __________________ Full Carbon Fiber Nissan 370z "400zTT" Fully Built 4.0L Twin Turbo 1300hp, 1100whp. Follow me on Instagram at http://www.instagram.com/carbonz.

06-02-2011, 08:57 AM	#17 (permalink)
TongMan A True Z Fanatic Join Date: Feb 2010 Location: NorCal Posts: 1,297 Drives: 2013 Nissan GTR Rep Power: 715	so, 5w30 is actually 75w90??

06-03-2011, 09:39 AM	#21 (permalink)
TongMan A True Z Fanatic Join Date: Feb 2010 Location: NorCal Posts: 1,297 Drives: 2013 Nissan GTR Rep Power: 715	also confirming that we need 4 quarts for our 370z?

06-03-2011, 09:52 AM	#23 (permalink)
TongMan A True Z Fanatic Join Date: Feb 2010 Location: NorCal Posts: 1,297 Drives: 2013 Nissan GTR Rep Power: 715	oh ok. The link I gave about stated we needed 4 quarts. Weird.

06-03-2011, 07:04 PM	#25 (permalink)
Zappypants Base Member Join Date: May 2011 Location: NC Posts: 15 Drives: 2010 MB Nismo 370Z Rep Power: 14	My 06 Z had the world's notchiest transmission ever. After 3K miles, I switched to Redline MT-90 (if memory serves) and couldn't believe the difference. Going with MT-85 when I do my next oil change (I mean hey, I'll be under there anyway, right?)

06-03-2011, 07:41 PM	#27 (permalink)
Zappypants Base Member Join Date: May 2011 Location: NC Posts: 15 Drives: 2010 MB Nismo 370Z Rep Power: 14	Spearfish25 has an excellent DIY: DIY: Transmission Oil Change It's easier, IMO, than a oil change, with the exception that you'll need a pump for the new fluid. No idea what the cost would be, sorry, but if you provided the oil I can't imagine it being too much at all.

06-07-2011, 09:58 AM	#29 (permalink)
wheee! A True Z Fanatic Join Date: Sep 2009 Location: Mod Capital of Canada Age: 57 Posts: 7,354 Drives: cars. lots of cars. Rep Power: 40182	Did ALL the fluids with synthetics (except brakes and clutch) at 5000kms. The diff was especially gross from the factory setup. Tranny looked like new, but wanted better. __________________ H&R / Stillen / Berk / HKS / Swift / Michelin / UpRev / SPC / Amuse Rep / Seibon / Fringe XVO / TWM / more... My Journal

06-07-2011, 10:04 AM	#30 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	I changed my transmission fluid at about 7000 miles, the fluid still looked brand new. The diff on the other hand was a nasty smelly mess. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

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