At around 1,500 hundred miles, I decided to change the oil in the bevel box box in hopes of lessening the shrillness of the whine. Someone on the list had recommended one of the gear climbing hypoid lubes and I sent away for some. I drove about 20 miles to get the bevel box warm, raised the Morgan, undid the drain plug ..... And nothing came out! I added oil unil it came out the hole above the drain plug and tried the process again. This time, I got about half a cup of black glop with the viscosity of chocolate pudding.
Long story short, after about 10 changes, I still get black fluid out of the bevel drive ( at least now, it flows readily). I gave up on the gear climbing lube and am now running Mobil 1 full synthetic 85/140. The drain plug has a magnet in it and for all the noise, I am yet to find any metallic residue.
Does anyone know hat the factory puts in bevel box as delivered?
It is not unusual for bikes and vehicles to be shipped without oil. Normally there are big labels everywhere to advise that oil should be added before starting.
It seems to me that dealers should be checking the oil level prior to delivery as part of the PDI.
Given that there have been some other reports on this forum that the oil level in the bevel box seems to be low perhaps it is worthwhile having it checked if there is any doubt at all.
In closing Moto Guzzi used to recommend the addition of molybdenum disulphide to the oil of the bevel drive. We used to use
Motul Gearbox 80W90 with great success and it certainly had the effect of quietening noisy transmissions.
. All the owners manual says is a fully synthetic 90weight.
![[Linked Image]](http://bradley.it/public_images/drive.jpg)
