i have a standard split gearbox and have drained whats left of the oil out for a re fill but how much in litres do i put in/buy???

oh and what grade?
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2.5 - 3 litres in the box, plus reduction boxes if you drained them.

SAE 90 hypoid gear box oil. Thats what I have just put in.

Just top it up until it dribbles out of the top-up hole. While you're at it get a tube of moly-slip and chuck that in as well. From memory there's one type of gear oil you shouldn't use as it isn't good for yellow metals which tend to be present in old vehicle gearboxes and one has a 5 in the numbers and one has a 4 but I can't remember which one is good/bad. I had to order mine (comma brand) as its not generally stocked by most shops. I'll have a look when I get home and post it up.
Shalom, Lee

Okay had a look and mine is EP80 and its a GL4. Not too sure what the additive is than they put in GL5 but I deffo recall that its not good for our type of 'boxes due to some of the bushes etc being made from yellow metal. That said it'd probably take about a thousand years to do any damage!!!
Anyhow Matt, hope that helps. Oh and we're planning on coming down either to your way or the Gower in Sept so I'll let you know

Shalom, Lee

I put in Morris 80W/90 GL4 into my gearbox. All seemed well until a seroius knocking occurs when under load after a hot run. Feels like the diff is shagged even though it has only done 31k miles from new!

The only thing we couldn't rebuild in the gearbox was the original ZF Limited Slip Diff as the parts are not available. Thought this might be the problem as everything else has been gone through. Reduction hubs rebuilt and the spade ends of the axle shafts are clean.

I have just received some Morris XEP90 GL5 (Limited Slip Diff and Final Drive Oil) this morning. This should hopefully solve my problem and there will be not need for the recommended additive, which is a Cheverolet one by the way. I have heard of a number of people with LSD's having gearboxes completely rebuilt when it was just the incorrect gear oil that was being used so fingers crossed my problems are down to this too.

Fla wrote:
I have just received some Morris XEP90 GL5 (Limited Slip Diff and Final Drive Oil) this morning. This should hopefully solve my problem and there will be not need for the recommended additive, which is a Cheverolet one by the way. I have heard of a number of people with LSD's having gearboxes completely rebuilt when it was just the incorrect gear oil that was being used so fingers crossed my problems are down to this too.

GL5 contains an EP (extreme Pressure additive) that can be corrosive the phosphor bronze conponents, ie selector forks. Some late gearboxes have steel selectors, but most will not. I'd stick with GL4

dsbus wrote:GL5 contains an EP (extreme Pressure additive) that can be corrosive the phosphor bronze conponents, ie selector forks. Some late gearboxes have steel selectors, but most will not. I'd stick with GL4

Yes this was true when GL-5 was first developed. Nowadays they conform to MT-1 standards and therefore do not attack yellow metals. Which is good as most new gearboxes contain yellow metals and GL5 is the most common oil. As I am running a LSD I shall definetly be using the GL-5 due to the EP additives.

If you look around all the sites you sill see that this has been a long running argument.
http://www.thesamba.com/vw/forum/viewto ... l5&start=0

Personally I shall put 2.5 litres of the best oil available for my setup and that is Morris XEP90 GL5

dsbus wrote:Some late gearboxes have steel selectors, but most will not. I'd stick with GL4

Bit off topic, but is that the right way round. Was told a while back that early ones had steel forks, but they were change on the later boxes for quieter / smoother operation. Just curious.

This is the one I bought.

http://cgi.ebay.co.uk/Smith-Allan-LS-Li ... 3a57e5f06d

Hope this is of some use?
Cheers Nathan
PS they also do GL4 and GL5