knightmb
Posts: 915
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Leaf Number: 306291
Location: Franklin, TN

Re: Reduction Gear Oil Change - Benefits for Range

Fri May 14, 2021 4:01 pm

voltamps wrote:
Fri May 14, 2021 1:36 pm
Wow, many people reporting gains after a gear fluid change. Maybe it's the 120 ppm or so (Blackstone analysis) metal particles floating around in the old stuff, getting on the roller & ball bearings, etc., that puts up some more resistance? Those magnets don't get it all out, we know. People who put in the thicker Redline D6 have even reported some gains, wrong or right, who knows?
I've put over +3K miles on my gear oil change so far, at this rate, come summer time when I do another change, I hope it will make a good analysis for Blackstone Lab to see if there was any reduction in metal particles (provided I'm not eating the gears), if the viscosity has changed in that time, etc. Should be interesting...
2020 Leaf SL Plus - (Manufacture Date March 2020)
2013 Leaf SV (8 faithful years of service before trade in at 75,679 miles)

estomax
Posts: 311
Joined: Fri Jan 20, 2017 9:23 pm
Delivery Date: 21 Jan 2017
Leaf Number: 424033
Location: Seattle

Re: Reduction Gear Oil Change - Benefits for Range

Mon May 17, 2021 4:46 pm

hmm.. i have to report an anomaly with my ULV oil change, i have started to hear a ticking sound from the transaxle, verified it is the gearbox and not the wheel bearings with a stethoscope just now. Going to get some Matic S and put that fluid back in there and see if it changes back for the better.

i pulled the fill plug and inspected the magnet, no significant buildup of any material over the last 1000 miles on it.

Image

Marko
2013 Leaf SL
27k, 93% SoH 2/17 46k, 94% SoH 2/18
62k, 87% SoH 2/19 75k, 83% SoH 2/20
81k, 81% SoH 2/21

voltamps
Posts: 113
Joined: Thu Dec 17, 2020 6:13 pm
Delivery Date: 14 Dec 2020

Re: Reduction Gear Oil Change - Benefits for Range

Tue May 18, 2021 5:55 am

estomax wrote:
Mon May 17, 2021 4:46 pm
hmm.. i have to report an anomaly with my ULV oil change, i have started to hear a ticking sound from the transaxle,
Yikes. That is the fear we all have in going too thin, wherever that line in the sand is. ... (((( Side note: I ran an '07 BMW 530i inline 6-cylinder on kv100 8 oil, though BMW said to use kv100 11 oil, for several years & had zero problems, so most of the time machinery can handle lower viscosity juice. (??) )))
estomax wrote:
Mon May 17, 2021 4:46 pm
Going to get some Matic S and put that fluid back in there and see if it changes back for the better.
I normally don't recommend additives to gear oil, but if it solves some small noise issues & prevents you from spending $2,000 on a new gearbox in the near future, then consider putting in some molybdenum made for this task by LiquiMoly, a decent european company, to fill in the asperities (pitting or micro-vallieys) and make the thing go another 50k miles. Either that or go a tad thicker to a kv100 7 oil in a Dexron III or Mercon V ATF fluid at walmart.
(Nissan Matic S is kv100 5.5 or so, fine, but you could go slightly thicker for a case like this if the funny sound persists.)
Image
on Amazon, or maybe napa autoparts carries it, not sure which autoparts stores have it.
estomax wrote:
Mon May 17, 2021 4:46 pm
i pulled the fill plug and inspected the magnet, no significant buildup of any material over the last 1000 miles on it.
Wow. You'd think metal would be present if noises r there, right?
2020 Leaf SV
2016 Ford Focus Electric (traded in at 34k miles, 5 years)

knightmb
Posts: 915
Joined: Mon Jan 12, 2015 7:41 pm
Delivery Date: 26 Feb 2021
Leaf Number: 306291
Location: Franklin, TN

Re: Reduction Gear Oil Change - Benefits for Range

Tue May 18, 2021 7:44 am

I haven't heard any sounds such as this, I have posted up a recent video (with sound) made inside the engine compartment, sounds more like a jet engine than anything, but don't remember any ticking sounds.
viewtopic.php?f=38&t=32136&start=100#p604374
Not being a gear or transmission expert myself, a ticking sound is usually a broken gear tooth I thought?

Can you make a video (or just sound) of it?
estomax wrote:
Mon May 17, 2021 4:46 pm
hmm.. i have to report an anomaly with my ULV oil change, i have started to hear a ticking sound from the transaxle, verified it is the gearbox and not the wheel bearings with a stethoscope just now. Going to get some Matic S and put that fluid back in there and see if it changes back for the better.

i pulled the fill plug and inspected the magnet, no significant buildup of any material over the last 1000 miles on it.

Marko
2020 Leaf SL Plus - (Manufacture Date March 2020)
2013 Leaf SV (8 faithful years of service before trade in at 75,679 miles)

estomax
Posts: 311
Joined: Fri Jan 20, 2017 9:23 pm
Delivery Date: 21 Jan 2017
Leaf Number: 424033
Location: Seattle

Re: Reduction Gear Oil Change - Benefits for Range

Tue May 18, 2021 7:58 am

ill get a sound of it tonight, and i think ill throw the thicker mercon v in there for the sake of science to see how much my economy worsens :) gotta keep the experiment going. you can only hear it on smooth pavement with the radio off and at speeds up to about 55 mph above which the wind noise masks it.

at the end of the day i am sample size 1 and correlation does not imply causation, so lets not jump to conclusions too fast.

Marko
2013 Leaf SL
27k, 93% SoH 2/17 46k, 94% SoH 2/18
62k, 87% SoH 2/19 75k, 83% SoH 2/20
81k, 81% SoH 2/21

User avatar
Nubo
Posts: 5965
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Delivery Date: 31 Oct 2014
Location: Vallejo, CA

Re: Reduction Gear Oil Change - Benefits for Range

Tue May 18, 2021 10:22 am

voltamps wrote:
Tue May 18, 2021 5:55 am
estomax wrote:
Mon May 17, 2021 4:46 pm
i pulled the fill plug and inspected the magnet, no significant buildup of any material over the last 1000 miles on it.
Wow. You'd think metal would be present if noises r there, right?
Might fragments big enough to represent a problem stand a better chance of being captured by the lower plug?
I noticed you're still working with polymers.

estomax
Posts: 311
Joined: Fri Jan 20, 2017 9:23 pm
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Re: Reduction Gear Oil Change - Benefits for Range

Tue May 18, 2021 5:32 pm

i will split out to another thread to not pollute this one with this sideshow. But i will get a better sound clip tonight in the garage hopefully too.
https://imgur.com/PR0Pu65
2013 Leaf SL
27k, 93% SoH 2/17 46k, 94% SoH 2/18
62k, 87% SoH 2/19 75k, 83% SoH 2/20
81k, 81% SoH 2/21

voltamps
Posts: 113
Joined: Thu Dec 17, 2020 6:13 pm
Delivery Date: 14 Dec 2020

Re: Reduction Gear Oil Change - Benefits for Range

Tue May 18, 2021 5:48 pm

Nubo wrote:
Tue May 18, 2021 10:22 am
Might fragments big enough to represent a problem stand a better chance of being captured by the lower plug?
could be. Hope not.. If it's only a faint sound, it might be solvable with slightly thicker fluid and/or molybdenum. Range won't suffer much at all with Mercon V. I'm running kv100 6.3, and mercon v is about 7.5. Supertech at Walmart or whatever brand that says mercon v works well.

The old tesla "milling sound" was bearings, for comparison, u know, when tesla changed to fancy ceramic bearings, that fiasco. Prob a different sound than this.

A guy on YouTube showed some half-peanut sized metal chunks out of a Leaf gearbox on a fluid change video. Scary but the gearbox lived on AFAIK.
2020 Leaf SV
2016 Ford Focus Electric (traded in at 34k miles, 5 years)

User avatar
Nubo
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Location: Vallejo, CA

Re: Reduction Gear Oil Change - Benefits for Range

Tue May 18, 2021 8:35 pm

voltamps wrote:
Tue May 18, 2021 5:48 pm
Nubo wrote:
Tue May 18, 2021 10:22 am
Might fragments big enough to represent a problem stand a better chance of being captured by the lower plug?
could be. Hope not..
I just meant that if there were any pieces they would sink and be more likely to be found on the lower rather than top plug; i.e., observation of the fill plug might not be revealing. Of course, I hope there's no problem at all.
I noticed you're still working with polymers.

estomax
Posts: 311
Joined: Fri Jan 20, 2017 9:23 pm
Delivery Date: 21 Jan 2017
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Location: Seattle

Re: Reduction Gear Oil Change - Benefits for Range

Tue May 18, 2021 9:35 pm

i ended up grabbing this at the auto parts store, since it was still matic S compatible at the least - Valvoline maxlife multivehicle ATF
https://sharena21.springcm.com/Public/D ... 162d889bd1

it is only 5.9, couldnt convince myself to buy a heavier one right now.. but fluid change is so fast for me now i may just try a few of these fluids lol.

the noise is still there, something is clunky in there, and clunky enough that i think a thicker fluid won't cover it up. i may try legit differential oil as a last resort, or a mix of diff fluid and ATF maybe.
2013 Leaf SL
27k, 93% SoH 2/17 46k, 94% SoH 2/18
62k, 87% SoH 2/19 75k, 83% SoH 2/20
81k, 81% SoH 2/21

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