New Isuzu 110 Owner in US

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Originally Posted by rick130

I'd try MT90.
The viscosity is spot on, it's equivalent to a 10W-40 engine oil.
You could also use MT85.
Amsoil in an equivalent viscosity would be a good choice too.

Synchro performance should be really good, and it won't shear like engine oil does in gearbox use.

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Thank you! I’ll report back with results.

AFAIR the Fairey overdrive shares it's oil with the transfer case anyway.

Again this is a long time ago , but you should drain both the transfer and Fairey then refill the Fairey and the oil will then run into the transfer until you get oil coming out of the Fairey.

They are different to the earlier Faireys as they do not have their own oil supply.
Regards Philip A
That is how I remember it anyway although it was 15 years ago

Following on from Philips comment, from what I remember the Fairey runs bloody hot too, I think MT90 or Amsoil MTG would be a good choice.

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Originally Posted by PhilipA

AFAIR the Fairey overdrive shares it's oil with the transfer case anyway.

Again this is a long time ago , but you should drain both the transfer and Fairey then refill the Fairey and the oil will then run into the transfer until you get oil coming out of the Fairey.

They are different to the earlier Faireys as they do not have their own oil supply.
Regards Philip A
That is how I remember it anyway although it was 15 years ago

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I’m planning to drain the transfer case and overdrive and then close both the transfer case drain plug and Fairey overdrive drain plug, then fill from the overdrive fill plug with the transfer case fill plug open until it overflows from the transfer case fill plug. Sound correct?
Attachment 133013


Also, I had a great conversation with one of the techs at Redline, and he thought the MT-90 would be great for the LT95, and should provide better protection and longer life than 20w50 or other engine oils. Amsoil MTG seems like an equally good product, but I’m going to try redline first.

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Originally Posted by kcwater

I’m planning to drain the transfer case and overdrive and then close both the transfer case drain plug and Fairey overdrive drain plug, then fill from the overdrive fill plug with the transfer case fill plug open until it overflows from the transfer case fill plug. Sound correct?
Attachment 133013


Also, I had a great conversation with one of the techs at Redline, and he thought the MT-90 would be great for the LT95, and should provide better protection and longer life than 20w50 or other engine oils. Amsoil MTG seems like an equally good product, but I’m going to try redline first.

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KC, i think i shares this previously when you private messaged me, but my initial experience with amsoil just down the road from you in Atlanta was not positive. I went back to 20w50 motor oil for the time being. Please let me know what you choose and how it goes. As we discussed I'm up your way somewhat often, always happy to meet up, chat and/or compare notes. Don't think you could have chosen a better land rover platform, but like many on here, I too am biased towards it. [emoji16]

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Originally Posted by tc_s1

KC, i think i shares this previously when you private messaged me, but my initial experience with amsoil just down the road from you in Atlanta was not positive. I went back to 20w50 motor oil for the time being. Please let me know what you choose and how it goes. As we discussed I'm up your way somewhat often, always happy to meet up, chat and/or compare notes. Don't think you could have chosen a better land rover platform, but like many on here, I too am biased towards it. [emoji16]

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Oh, and I'm running 15w40 mack oil in one of the engines at the moment instead of the Rotella as an experiment recommended to me by an Isuzu commercial guy here who has been with them since the 4bd1 came out.

"Mack Engine Oil EOS-4.5 is available in 10W30 and 15W40 weights and meets Mack’s stringent EOS-4.5 engine oil standard, which offers protection above and beyond the new American Petroleum Institute (API) CK-4 specification by requiring enhanced performance for oil oxidation and oil aeration control. It is also formulated with a lower viscosity, helping improve fuel efficiency, even under high loads and high ambient temperatures.

Mack Engine Oil EOS-4.5 can be used anywhere API CK-4 oils are recommended and is also fully backward compatible with all API CJ-4 applications."

I'll keep you updated as it goes along and when next I change I plan to have it tested to see how it has gone in a bit more detail.

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Originally Posted by tc_s1

KC, i think i shares this previously when you private messaged me, but my initial experience with amsoil just down the road from you in Atlanta was not positive. I went back to 20w50 motor oil for the time being. Please let me know what you choose and how it goes. As we discussed I'm up your way somewhat often, always happy to meet up, chat and/or compare notes. Don't think you could have chosen a better land rover platform, but like many on here, I too am biased towards it. [emoji16]

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Thanks for the update! I swapped whatever was in my LT95 for the redline MT90, and so far it’s a dramatic improvement in shifting. I’ll check out that Mack oil as well, thanks!

My only current problem is that I don’t know where to get all of the copper and fiber seals for fluid changes. I know there’s a few U.K. shops that have a variety of options but I don’t know if what they stock is correct for this application.

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Originally Posted by kcwater

Thanks for the update! I swapped whatever was in my LT95 for the redline MT90, and so far it’s a dramatic improvement in shifting. I’ll check out that Mack oil as well, thanks!

My only current problem is that I don’t know where to get all of the copper and fiber seals for fluid changes. I know there’s a few U.K. shops that have a variety of options but I don’t know if what they stock is correct for this application.

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There's no single point I've foumd for things like those. There are a few shops in the southeast areas, there's Land Rover suppliers for LR specific items (Rovers North beimg one of them but they specifically don't support the Isuzu they say so you need to know what to get), there are several places in the UK and of course for these, Australia. I have found the members here the best guidance and over the last fee months as I've rebuilt one of mine, a few have been helpful with bits and pieces I jist haven't been able to find. Do you know what slecific parts you are looking for, with numbers or diagrams from the manual or photos of the actual parts? There are members here highly versed in gearboxes (I am not yet one of them, though learning).

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Originally Posted by tc_s1

There's no single point I've foumd for things like those. There are a few shops in the southeast areas, there's Land Rover suppliers for LR specific items (Rovers North beimg one of them but they specifically don't support the Isuzu they say so you need to know what to get), there are several places in the UK and of course for these, Australia. I have found the members here the best guidance and over the last fee months as I've rebuilt one of mine, a few have been helpful with bits and pieces I jist haven't been able to find. Do you know what slecific parts you are looking for, with numbers or diagrams from the manual or photos of the actual parts? There are members here highly versed in gearboxes (I am not yet one of them, though learning).

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thanks. Here’s a pic of what I’m looking for. I also need the seal for the oil pan, but I don’t have that one off to measure it.

1985 Land Rover 110 County seals - Album on Imgur

You can get those from any Land Rover parts supplier. The LT95 was used for a very long time, not just for the Isuzu engine. Look up the part numbers.