Change out differential and transfer case fluids

[ryanjl]

Surely it's the same.

I know the transmission is an 8speed, but the transfer case and diffs are the same as far as I know.

 

[equalizer]

Surely it's the same.

I know the transmission is an 8speed, but the transfer case and diffs are the same as far as I know.

Thanks.
Just finished changing the rear electronic/front/transfer case oils on my 2016 LR4 HSE + HD package (= Rear electronic diff + 2 speed transfer case).
For the front I needed to had the same exact plug as the rear (glad I read this thread before ordering from Atlantic British).

I re-used the 2 plugs for the transfer case. Couldn't find the exact size anywhere.

 

[Quijote]

(glad I read this thread before ordering from Atlantic British).

I re-used the 2 plugs for the transfer case. Couldn't find the exact size anywhere.

Glad I saved you some pain. That was such a headache.

 

[Brizzity]

Reviving this post for a little clarity hopefully.

I'm about to take this project on and am looking for clarification on the plugs specifically, and which should be replaced.
My assumption would be that we're trying to replace all three drain plugs.

The Atlantic British kit shows two plugs in the picture and lists parts IYB500020 and IVY500030 as the plugs and
washers that come with the kit. Searching out those parts individually on their own, they say transfer
case fill/drain plug and washer on the AB site. I read on others posts here about the kit coming with one wrong plug.

So,

We're dealing with 3 drain plugs and 3 fill plugs in total on this. We're looking to replace all 3 drain plugs and washers?

and

What does the AB kit actually come with/what needs to be sourced separately?


Thanks in advance...

 

[Stuart Barnes]

You shouldn’t have to renew any plug unless you damage it.
What you must do is anneal the copper washer to make it nice and soft again to make a good seal.

a steel plug can last the lifetime of the vehicle if the correct tools are used.

 

[Izzyandsue]

This is the second time I do the diff and transfercase (119K miles now). For the differentials used Castrol Syntrax, transfercase used Royal Purple SYNCHROMAX, which according to their website is a match of the Shell TF0753 that is listed in the shop manual. Rear was easy, the removed 1.2L which just happens to match the fill port hole, so didnt have to measure back in, just fill to drip.

The transfercase was easier by removing the ground strap, then I can swing the bottle up and pour into the fill hole, fill to overflow as well.

The front diff measured 600ml removed, so used one of these graduated funnels with front tire removed, measured about 620ml and pour into funnel, then openned funnel to fill. Added the extra 20ml as some will be left behind in initial bottle and then the funnel, pesky viscocity....

 

[Balto]

Bump...I like to use Redline Oils and plan to change out the Diffs and use the Redline recommended oil. I also wanted to use Redline Transfer case oil but the redline website doesn't show any that is recommended for my '15 LR4. So I called and spoke with a tech....He looked it up and confirmed that the recommended is the "Shell TF 0753" and then he did a cross reference of that oil and said I should use Redline's MT-LV. Has anyone done this or looked into this?

So again:

Differentials:
Redline 75W90 GL-5 Gear Oil

75W90 GL-5 Gear Oil

Most popular Red Line gear oil, with thousands of applications for passenger cars, light trucks, and racing vehicles

www.redlineoil.com

Transfer Case:
MT-LV 70W/75W GL-4 Gear Oil

MT-LV 70W/75W GL-4 Gear Oil

Meet our newest addition to the GL-4 family!

www.redlineoil.com

You Redline people have thoughts on this? Thanks

 

[Izzyandsue]

Not sure, but the Synchromax seemed to me like pretty low viscocity, unlike gear oil, looked more like ATF than gear oil. I didnt measure anything with a Brookfield viscometer, just my fingers-o-meter.
I used Redline on the diffs the first few times I did mine, but that was because a had a couple of cases left over. It is great stuff, no doubt.

 

[Balto]

Thanks Izzy for the info!

About the Viscosity I did some digging and this is what I found.

Shell TF 0753(Basically GL-4 Gear oil)
Viscosity @ 40 C (cST): 36
Viscosity @ 100 C (cST): 7.3
Viscosity Index: 174

Royal Purple Synchromax (GL-4 gear Oil)
Viscosity @ 40 C (cST): 39
Viscosity @ 100 C (cST): 7.5
Viscosity Index: 162

Redline MT-LV (GL-4 Gear oil)
Viscosity @ 40 C (cST): 29.8
Viscosity @ 100 C (cST): 6.5
Viscosity Index: 175

So I can see why a lot of people use RP Synchromax instead of Shell 0753....Looks like pretty similar stuff.

The Redline MT-LV, still a GL-4 gear oil, is lower in Viscosity than the others and while the Redline tech said I would not notice a thing and would highly recommend the MT-LV for my Transfer Case I still hesitate on the 6.5 Viscosity vs the 7.5'ish of the Sheel/Synchromax.

Anyone have any input on this? Thanks

 

[Balto]

Also I did more digging and it looks like TF-0870 is the NEW spec that replaced TF-0753. I found the Ravenol TF-0870 and it clearly states that it is the updated spec for Land Rover models requiring transfer case gear oil specification or part number: IYK500010, LR0753, TF-0753, TF-0870, Special Transfer Box Oil.

If this is true, not sure why Ravenol would lie haha, then the Redline MT-LV states that it meets the requirements for Shell TF0870!

So it seems it boils down to.....The 7.5 Viscosity of the Synchromax vs the 6.5 of the Redline MT-LV and why one of the other?