HRTKD
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Re: How To: Reduction Gear Oil Change

Sun Sep 29, 2019 5:49 pm

Kev994 wrote:
Sun Sep 29, 2019 2:17 pm
Has anyone tried AMSOIL Signature Fuel Efficient ATF? It says that it is Matic S equivalent. https://www.amsoil.com/shop/by-product/ ... ion-fluid/
That's what I'll probably use. But only because I have at least a case of it left over.
2019 Leaf SV+ with Tech and Weather packages
2015 Leaf S (Totaled 10/2019)
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Kev994
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Re: How To: Reduction Gear Oil Change

Sun Sep 29, 2019 6:25 pm

HRTKD wrote:
Sun Sep 29, 2019 5:49 pm
Kev994 wrote:
Sun Sep 29, 2019 2:17 pm
Has anyone tried AMSOIL Signature Fuel Efficient ATF? It says that it is Matic S equivalent. https://www.amsoil.com/shop/by-product/ ... ion-fluid/
That's what I'll probably use. But only because I have at least a case of it left over.
Yeah, I run it in my Outlander. Since asking I used the AMSOIL product recommender, they list it for the “single speed automatic transmission “
2016 SL Coulis Red

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Nubo
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Re: How To: Reduction Gear Oil Change

Sun Sep 29, 2019 9:52 pm

Kev994 wrote:
Sun Sep 29, 2019 2:17 pm
Has anyone tried AMSOIL Signature Fuel Efficient ATF? It says that it is Matic S equivalent. https://www.amsoil.com/shop/by-product/ ... ion-fluid/
If it's equivalent then it meets the owner's manual service requirements.

But in fact I doubt if even that is technically needed by a simple reduction gearbox. Most of what distinguishes the plethora of ATF fluids are the special "friction modifiers" which are tailored to the specific requirements of the clutches and friction bands of the automatic transmissions they're used in. There's no such wizardry inside a LEAF gearbox, the fluid is needed for lubrication only. The service manual warns against "deterioration in drivability" if other fluid is used, a reference to poor shifting. A sign that someone just cut and pasted the Matic S boilerplate.
I noticed you're still working with polymers.

Oilpan4
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Re: How To: Reduction Gear Oil Change

Sat Oct 05, 2019 11:23 am

The leaf transmission is lacking a torque converter and therefore most of the heat normal autos have to deal with, no pump, no filter, no clutches, no bands, no hydraulic solenoids, no valve bodies, doesn not use multiple quarts of fluid, only has one speed, no "rubber band drive" as seen on CVT type transmissions.
About the only things a leaf transmission and an regular auto have in common is they both use oil, have drain plug magnets and have a parking lock.

Any oil that doesn't eat the seals and doesn't foam up like mad should work. Anything that would be put into an automatic transmission, differential or transfer case would be what you want.
2011 white SL leaf with 2014 batt.
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LeftieBiker
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Re: How To: Reduction Gear Oil Change

Sat Oct 05, 2019 11:28 am

Any oil that doesn't eat the seals and doesn't foam up like mad should work. Anything that would be put into an automatic transmission, differential or transfer case would be what you want.

With no brake bands or clutches, you don't want an ATF fluid with friction increasing additives.
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Oilpan4
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Re: How To: Reduction Gear Oil Change

Sun Oct 06, 2019 4:37 pm

Do we know the matic s doesn't have these friction modifiers?
2011 white SL leaf with 2014 batt.
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HRTKD
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Re: How To: Reduction Gear Oil Change

Sun Oct 06, 2019 6:06 pm

Oilpan4 wrote:
Sun Oct 06, 2019 4:37 pm
Do we know the matic s doesn't have these friction modifiers?
None of the ATF fluids I've worked with in a DIY capacity have had friction modifiers. The only fluid I've worked with that sometimes has the friction modifier built in is a gear lube designed for a rear differential. In that case, the gear lube explicitly is labeled as having the friction modifier.
2019 Leaf SV+ with Tech and Weather packages
2015 Leaf S (Totaled 10/2019)
2017 Ford F-350 CCLB 6.7L SRW 4x4

Goodbar
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Re: How To: Reduction Gear Oil Change

Sun Oct 06, 2019 7:16 pm

HRTKD wrote:
Sun Oct 06, 2019 6:06 pm
Oilpan4 wrote:
Sun Oct 06, 2019 4:37 pm
Do we know the matic s doesn't have these friction modifiers?
None of the ATF fluids I've worked with in a DIY capacity have had friction modifiers. The only fluid I've worked with that sometimes has the friction modifier built in is a gear lube designed for a rear differential. In that case, the gear lube explicitly is labeled as having the friction modifier.
I don't think there's any way to know unless Nissan (or others) revealed their ATF formulation. A friction modifier for a limited-slip differential is intended to avoid chatter by reducing friction in the clutch pack that conventional diffs lack. But auto transmissions have multiple clutch packs. You can buy a friction modifier supplement for ATF to reduce converter lockup chatter or potentially soften hard shifts in an AT that you're not quite ready to rebuild: https://www.lubegard.com/products/black/

Since there are no clutch packs in the Leaf reduction gear box, friction modifiers are irrelevant as some others have noted. (Which is also true for the differential inside the transaxle of nearly all front-drive automatics.) Nissan presumably didn't want to formulate a new lubricant for the Leaf, so they took the most suitable product off the shelf. No need to overthink this one, just run the OEM ATF or a compatible 3rd-party product. Presumably, Nissan designed the box for minimal friction loss and an acceptable lifespan with the viscosity and and other characteristics of ATF. Gear oil is much thicker (higher viscosity) than ATF, which would undoubtedly affect energy efficiency.
2017 Leaf SV OpenEVSE 40A

lashlee
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Re: How To: Reduction Gear Oil Change

Wed Oct 23, 2019 10:48 am

I changed out the fluid in my '18 SL yesterday at 35k miles. The magnets were covered and the fluid was very dark. I used Redline D6. I'll keep doing it at 30-35k from here on out.

Oilpan4
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Re: How To: Reduction Gear Oil Change

Thu Oct 24, 2019 9:06 am

Wow 35k, I wouldn't have guessed it would be that bad.
I did mine at 68k. I will be sure to do it again before 100k.
2011 white SL leaf with 2014 batt.
Chargers: Panasonic brick moded for 240v, duosida 16a 240v and a 10kw setec portable CHAdeMO
Location: 88103

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