GaleHawkins
Posts: 496
Joined: Sat Oct 26, 2019 5:24 pm
Delivery Date: 15 Oct 2019
Leaf Number: 311365
Location: Murray KY

Re: How To: Reduction Gear Oil Change

Mon Jun 07, 2021 12:26 am

Valdemar wrote:
Sun Jun 06, 2021 4:25 pm
Closing in on 180k miles with the original oil, no major changes in the gear noise levels.
That's an amazing report. Mechanically speaking I don't think it has to be changed. With every thing in front of motor stripped off it was just a stand on your two feet job plus I wanted to see if adding the Archoil AR9100 additive could make a measurable difference in mileage. I expect the answer is no and have seen no report from the Russian Leaf owner that used the AR9100. I think the active ingredient is mined in Russia.

I hope saving our Leaf is as successful as in your case. Getting a new battery then getting totalled is a bad trip.

BrockWI
Posts: 859
Joined: Fri Mar 28, 2014 6:28 am
Delivery Date: 28 Mar 2014
Leaf Number: 423875
Location: Green Bay, WI.
Contact: Website

Re: How To: Reduction Gear Oil Change

Mon Jun 07, 2021 6:01 am

I changed ours at about 60,000 miles and it was dark and some metal & sludge on the magnetic plugs. I changed it again about a month ago at 125,000 miles and it was still very red and very little metal on the plugs. I doubt I will change it again based on how clean the second change was, I am guess the first one was more of a wear in, I did use the Redline D6 on the changes.

On the first change I did see a .1 to .2 increase in the miles/kwh but on this change I haven't noticed any change.

As with the first change the hardest part was getting the darn plastic belly pan off, breaking half the clips and then getting the pan back on, if it weren't for the belly pan it would have been a 10 minute job...
2013 S W/QC Mar of 2013
110k miles - 52.24Ahr - 79.88SOH - 71.33Hx - 227GID
2018 Tesla Model 3 SR+ 32k miles
3.3 kw solar pv - XW6048 - eight L16's
4 ton GSHP - 1 ton ASHP
2003 VW TDI 220k miles - 51 mpg lifetime

GaleHawkins
Posts: 496
Joined: Sat Oct 26, 2019 5:24 pm
Delivery Date: 15 Oct 2019
Leaf Number: 311365
Location: Murray KY

Re: How To: Reduction Gear Oil Change

Mon Jun 07, 2021 7:43 am

BrockWI wrote:
Mon Jun 07, 2021 6:01 am
I changed ours at about 60,000 miles and it was dark and some metal & sludge on the magnetic plugs. I changed it again about a month ago at 125,000 miles and it was still very red and very little metal on the plugs. I doubt I will change it again based on how clean the second change was, I am guess the first one was more of a wear in, I did use the Redline D6 on the changes.

On the first change I did see a .1 to .2 increase in the miles/kwh but on this change I haven't noticed any change.

As with the first change the hardest part was getting the darn plastic belly pan off, breaking half the clips and then getting the pan back on, if it weren't for the belly pan it would have been a 10 minute job...
BrockWI thanks for your report and outcome of both changes. I expect your data sums the case. Someone had mentioned most of the metal sludge may be generated in the first 5K miles of driving. What you found at 60K miles matches we found at 37K miles.

The Toyota van that ran the red light and came to rest upside down removed our belly pan when he sheared our nose off just missing the front tires by 6 inches.

My son said we could just remove check level magnetic plug in the future to check for metal but from your report I don't see the need.

Valdemar's report of closing in on 180K running the factory fill and no problems indicates to me the two magnets must be doing their job well.

SageBrush
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Location: NM

Re: How To: Reduction Gear Oil Change

Mon Jun 07, 2021 9:46 am

My recipe for getting the plastic clips out without damage is to gently wiggle the center pin to shake out the dirt and loosen them up. Then they come out as intended. Eventually the plastic gets old and stiff and they break but that actually takes quite a few years.

I share the majority opinion about the ATF: one exchange is mostly ** optional and more than that is overkill. I don't consider the time I spent on it wasted but I see no reason to ever swap it again.

** One could hedge and just pull out the fill plug for a cleaning one time. As Gale says though, most of the time spent is taking off the bellypan so <<shrug>>. I could see someone who wants to keep the OEM ATF cleaning the plug at 5 - 10k miles one time and calling the job done for at least 100k miles. That way the clips are still fresh :)
2013 LEAF 'S' Model with QC & rear-view camera
Bought Jan 2017 from N. California
Two years in Colorado, now in NM
03/18: 58 Ahr, 28k miles
11/18: 56.16 Ahr, 30k miles
09/20: 54.3 Ahr; 38k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

BrockWI
Posts: 859
Joined: Fri Mar 28, 2014 6:28 am
Delivery Date: 28 Mar 2014
Leaf Number: 423875
Location: Green Bay, WI.
Contact: Website

Re: How To: Reduction Gear Oil Change

Mon Jun 07, 2021 10:18 am

Yes, our salt / snow / fun winters do a number on anything under the car :) I tried my best and saved about half of the clips the first time and about half this time, luckily I have a large assortment box of plastic clips and just grab what I needed. I did grease up the 10mm screws that go in to the clips to help them last longer.

I bought 3 quarts when I did the first change, so it worked out well to do a second change anyway.
2013 S W/QC Mar of 2013
110k miles - 52.24Ahr - 79.88SOH - 71.33Hx - 227GID
2018 Tesla Model 3 SR+ 32k miles
3.3 kw solar pv - XW6048 - eight L16's
4 ton GSHP - 1 ton ASHP
2003 VW TDI 220k miles - 51 mpg lifetime

voltamps
Posts: 148
Joined: Thu Dec 17, 2020 6:13 pm
Delivery Date: 14 Dec 2020

Re: How To: Reduction Gear Oil Change

Mon Jun 07, 2021 1:47 pm

GaleHawkins wrote:
Mon Jun 07, 2021 12:26 am
Valdemar wrote:
Sun Jun 06, 2021 4:25 pm
Closing in on 180k miles with the original oil, no major changes in the gear noise levels.
That's an amazing report. Mechanically speaking I don't think it has to be changed.
Just a note, in case it was missed, is that Valdemar reported a gearbox (or motor area?) noise 2 years & 15k miles ago.
And now we know the noise is still there. .... https://www.mynissanleaf.com/viewtopic. ... 60#p562946 ...
(Might be the CV joints half-shafts mistaken for gears or the motor bearings. Those joints can go out any time, but the dealership probably hand-shook the CV joints to see if they seemed loose.)

On the gears & differential box, looks like Nissan engineers, probably targeting ~150k miles life (middle of a bell curve) by design, got it basically right, as this thing can last anywhere from 120k miles to 250k miles on the original factory ATF fluid. Limited evidence though.

If you're not keeping a Leaf past about 100k miles, then don't change the fluid, unless you really want to. I found it easy to DIY, & I got an all-PAO stable "forever fluid" using Amsoil SS ATF in there. .. Truth is, Any cheaper ATF fluid will work OK, since they all do well with just gears & bearings like ours has.
2020 Leaf SV - sold - I'll get another EV later...Reserved the irresistible Maverick Hybrid, here in a few months
2016 Ford Focus Electric (traded in at 34k miles, 5 years)

Valdemar
Posts: 2672
Joined: Tue May 10, 2011 10:32 pm
Delivery Date: 09 Sep 2011
Location: Oak Park, CA

Re: How To: Reduction Gear Oil Change

Tue Jun 08, 2021 9:44 am

If memory serves I first noticed the noise around 120k, it has gotten louder over time but for the last 20-30k has been more or less without changes, I got used to it and don't pay attention to it anymore. It comes from the reduction gear/motor area definitely not from CV joints. That said, it is hard to know what exactly causing it, but worn gears is a reasonable guess. A bit late to change the gear oil I think, so I'll just drive it until no longer can. Not putting as many miles as before on the car, so it should last couple more years and then I'll be ready to junk it.
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
-0CB(66.14AHr)@87.5k/54mo (BBB), -1CB(53.92Ahr)@140k/29mo,
51.1AHr, SOH 80%, 150k miles

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