Hi Wally,
I am with you on this, my view is that this was an idea for Land Rover swivels, and it is not compatible with Daimler Dingo, Armoured Car or Ferret, due to its inability to flow to the required areas. Having had many years experience working on both Ferrets and Dingos (and all other MV's) and understanding the workings of them, there is a high risk of damage due to lack of lubrication on all moving parts. I was asked about final drives over heating on a Daimler armoured car and asked what the oil level was like in the bevel boxes, when checked it was found that they had grease in them. I then asked where the heat was and it was pointed out to the section of drive line between the two tracta joints, the shafts in this section run in bronze bushes so very likely they were not getting the lubrication and possibly the inner tracta was not getting any either.
With Dingos, the lubricant in the outer tracta also feed in to the wheel bearings and it is unlikely that this "L/R" grease will flow in to that area.
If owners are concerned about leaks then it is time to renew the seals and check condition of the tracta challis's for scoring or pitting.
For Dingos and Daimler armoured cars, the recommended oil for the final drives is SAE 140 gear oil (NOT EP 140)