Gearbox Oil - Wiki error?

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Gearbox Oil - Wiki error?

Postby Simon_P » Sun 24.04.2016, 14:55

The recommended oils are all GL-4

The wiki says
"Bottom line: 75W-90 GL-5 full synthetic gear oil." which I believe is incorrect.
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Re: Gearbox Oil - Wiki error?

Postby GeoffSmith » Sun 24.04.2016, 20:57

In 2011 it looks like Tigerdog added "GL4 (or GL5)" and later changed it to GL5. I've asked him to look in as it looks like GL5 may not be a good move: GL4 GL5 comparison. :shock:
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Re: Gearbox Oil - Wiki error?

Postby lotusflasherman » Sun 24.04.2016, 21:52

Simon_P wrote:The recommended oils are all GL-4

The wiki says
"Bottom line: 75W-90 GL-5 full synthetic gear oil." which I believe is incorrect.


:agree:

After Mobil 1 RTS 9775 Fully Synthetic SAE5W/30 specified in SE Handbook & Service Manual disappeared Lotus specified Castrol TAF-X 75W/90 but that's also disappeared .
Reckon this is the current oil, and it's GL-4(+) so shouldn't eat phosphor bronze bushes and synchro hubs .. :lol:
www.opieoils.co.uk/p-6363-castrol-syntrans-transaxle-75w-90-formerly-taf-x-75w-90-synthetic-transmission-fluid.aspx
Last edited by lotusflasherman on Mon 25.04.2016, 15:28, edited 1 time in total.
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Re: Gearbox Oil - Wiki error?

Postby tigerdog » Mon 25.04.2016, 01:47

wiki updated; GL-4 is correct. Quaife web site once recommended GL-5; it's been updated to recommend GL-5 on when transaxle mfg recommends it, which for the M100, Lotus do not. Thanks to Geoff Smith for details (also updated in wiki) and sincere apologies for those who went the GL-5 route based on the previous wiki entry. :oops:
Last edited by tigerdog on Mon 25.04.2016, 21:26, edited 1 time in total.
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Re: Gearbox Oil - Wiki error?

Postby tb10 » Mon 25.04.2016, 11:48

Damn..... Jyst bought some GL-5 and it's now in the gearbox......do I drain it or leave it.....?

:(

Regards


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Re: Gearbox Oil - Wiki error?

Postby lotusflasherman » Mon 25.04.2016, 15:26

tb10 wrote:Damn..... Jyst bought some GL-5 and it's now in the gearbox......do I drain it or leave it.....?
:(
Regards
John


I'd say for cost of wasting £30 and a couple of hours, drain it a.s.a.p.

All the extreme pressure Hypoid oils from Duckhams or Castrol that I've used in the past, EP80 in gearboxes and EP90 in diffs, complied with API GL4 and were perfectly satisfactory.
Reading up on GL-5, I see it has slightly better shear properties but mainly suited to differentials as some of the additives attack phosphor bronze... https://en.wikipedia.org/wiki/Gear_oil
(First paragraph under API Ratings is appropriate). Gearboxes frequently contain phosphor bronze layshaft bearings and synchro hubs so it would not be a good idea to use a GL-5 oil in those.
Think you owe Simon-P a :cheers: for starting this thread. He might have saved you a gearbox rebuild in the future... :lol:
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Re: Gearbox Oil - Wiki error?

Postby HJ2 » Mon 25.04.2016, 17:38

Uh-oh!... Time to rush to the garage (It's one block away) to check whatever is left in my can :shock:
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Re: Gearbox Oil - Wiki error?

Postby Giniw » Mon 25.04.2016, 18:30

:agree: :?

...
...
(sent a sms to ask someone to check :lol:)

lotusflasherman wrote:
Simon_P wrote:Reckon this is the current oil, and it's GL-4(+) so shouldn't eat phosphor bronze bushes and synchro hubs .. :lol:
www.opieoils.co.uk/p-6363-castrol-syntrans-transaxle-75w-90-formerly-taf-x-75w-90-synthetic-transmission-fluid.aspx
I am glad I put that Castrol GL4 oil in my gearbox a year ago ^^ (except that it's the GL-4 variant, not the GL-4+ as showed on your photo)
Actually I remembered I had read the bronze bushes issue but I was not sure what I had decided. Glad I did the right choice =)
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Re: Gearbox Oil - Wiki error?

Postby tb10 » Mon 25.04.2016, 19:38

Indeed, a big "THANK YOU" to Simon for pointing that error out and I also agree, £38.00 of oil drained out = £???.?? saving in repairs further down the line!

:cheers:

regards

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Re: Gearbox Oil - Wiki error?

Postby par » Mon 25.04.2016, 22:11

Thanks from me also as I just filled the gearbox with GL5 after checking wiki, car hasnt turned a wheel yet so wont have done any harm (except to my wallet).

At least the gearbox will be well flushed!
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Re: Gearbox Oil - Wiki error?

Postby Simon_P » Tue 26.04.2016, 00:39

I shouldn't think it does any harm in the short run otherwise there would be cars stopped everywhere and the internet would be awash with pictures of dead gearboxes. I can only find anecdotal evidence.

If you have clean 75W90 GL5 give it to someone who has a separate diff as GL5 is the spec for what we all used to refer to as EP (extreme pressure).
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Re: Gearbox Oil - Wiki error?

Postby tb10 » Tue 26.04.2016, 09:06

Simon_P wrote:If you have clean 75W90 GL5 give it to someone who has a separate diff as GL5 is the spec for what we all used to refer to as EP (extreme pressure).


So will this work in the diffs on my RR L322? 8)

regards

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Re: Gearbox Oil - Wiki error?

Postby tb10 » Tue 26.04.2016, 09:08

Edit..........

Just checked:

Front differential refill 0.75L (0.8 US quarts) from dry 0.8L (0.85 US quarts) Texaco S5 75W90 API GL5 or Castrol SAF X0 TYK500010 SX 75W90 synthetic

Rear differential refill 1.0L (1.1 US quarts) from dry 1.2L (1.3 US quarts) Texaco S5 75W90 API GL5 or Castrol Carbon 75W90 TYK500070 SX 75W90 synthetic

So that will be a yes then!

Fabulous :lol:
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Re: Gearbox Oil - Wiki error?

Postby Fredjohn » Tue 26.04.2016, 09:34

tb10 wrote:Edit..........

Just checked:

Front differential refill 0.75L (0.8 US quarts) from dry 0.8L (0.85 US quarts) Texaco S5 75W90 API GL5 or Castrol SAF X0 TYK500010 SX 75W90 synthetic

Rear differential refill 1.0L (1.1 US quarts) from dry 1.2L (1.3 US quarts) Texaco S5 75W90 API GL5 or Castrol Carbon 75W90 TYK500070 SX 75W90 synthetic

So that will be a yes then!

Fabulous :lol:


Yaow ay wasted it then. Oil av a point next toime we meet :D :D
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Re: Gearbox Oil - Wiki error?

Postby tb10 » Tue 26.04.2016, 10:32

Fredjohn wrote:Yaow ay wasted it then. Oil av a point next toime we meet :D :D


I might have to buy you a pint (of beer) as I've got two diffs to care for on the RR, one obviously larger than the other! :lol:

regards

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