 | Home > Technical > Can I use this in the transfer box |
 
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| souster4 Member Since: 11 May 2014 Location: West midlands Posts: 153  
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As title guys, for the transfer box in a td5 defender. Mannol oils on offer
https://www.ebay.co.uk/itm/MANNOL-4L-Extra...890.l49292 Want to stick to fully synthetic, and GL4. But this oil states GL5 for limited slip diffs... is that going to be a problem? Only other alternative just states gl4+. God knows what gl4+ plus is compared to gl4. Any ideas guys or go for a different brand Thanks |
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7th Jan 2021 11:40am |
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| Joel Member Since: 18 Oct 2020 Location: Rotherham Posts: 66 
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LT230 can use GL4 or GL5 as long as its mineral EP80/90 or synthetic EP75W90 which this is, so it will be fine.
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7th Jan 2021 11:56am |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3184  
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Never hear of the brand... not sure if I pay premium prices for the brand name only, or if they are indeed better blends with RnD to back up the performance.
Been bitten once with cheap 2 stroke oil.. I ran out of oil, and bought what I could find...it met the specification according to the label, but the result was huge carbon build up on the piston crown and head that once dislodged scratched the bore. So in my opinion, buy the best you can afford. With gear oils, it is more difficult to see the performance difference. Just my opinion. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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7th Jan 2021 1:09pm |
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| Joel Member Since: 18 Oct 2020 Location: Rotherham Posts: 66
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They say it meets the standard, so it’s fine. GL5 is just a meant for higher stress applications such as LSD’s, so it won’t do any harm putting it in something that normally takes GL4. If it helps, I’ve always used smith and Allen for my lubricants. They are a little more expensive, but I am always wary of names I have never heard before. |
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7th Jan 2021 2:10pm |
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| Bluest Member Since: 23 Apr 2016 Location: Lancashire Posts: 3995 
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GL5 can be corrosive to certain metals that are fine with GL4. I wouldn’t use a GL5 oil in a GL4 application unless it is dual certified for that reason. 2007 110 TDCi Station Wagon XS
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7th Jan 2021 2:16pm |
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| souster4 Member Since: 11 May 2014 Location: West midlands Posts: 153
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Thanks everyone. All sorted 👍
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8th Jan 2021 1:11am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16857 
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This. The underlying reasoning is that the additional sulphur content of GL5 damages "yellow" metals (brass, copper, and bronze). Sulphur tends to "stick" to any metals surface and provide a nice slippery surface, but can under the right conditions cause the surface to break up on the yellow metals with seriously destructive results. The effect is likely to be more sever the hotter the oil (and LT230s do get pretty hot). This is another of those subjects where you will now find a wide range of very different opinions on the Internet, but in general you won't find an old school mechanic or engineer who uses GL5 in any older-technology gearbox. |
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8th Jan 2021 10:09am |
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| souster4 Member Since: 11 May 2014 Location: West midlands Posts: 153
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Cheers guys.
To be honest I was aiming more on the fact it was limited slip gl5 rather than gl5 itself. But apparently that particular oil can be used in traditional diffs etc |
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8th Jan 2021 11:39am |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2077 
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Dont underestimate the ability of the wrong oil to damage bronze and brass components in gearboxes of any sort !
Mo The Land Rover 90 - Many are called, few are chosen. |
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8th Jan 2021 2:32pm |
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