Re: Gear Lube and Bronze/Brass Redux

Posted by Pat Brothers On 2012/8/21 16:41:31

Thanks Tim for your help,

I have been using 140w GL-4 in the trans and diff.

I raised the issue because I just noticed that the Service Manual calls for "600W or Whitmore's 'O' Compound". Is 160w the new 600w?

I know the higher viscosity will aid in shifting (although we really do not have a problem). The transmission and differential depend on "splash" lubrication as the fill level is below the bearings for the transmission input and output shafts. With the higher viscosity it could take a bit to get gear lube to the bearing surfaces, particularly if the car sits for any length of time.

Our winters are very mild, rarely getting below 32 degrees, and this car winters in an Airplane/Automobile Museum.

We are preparing to take off on the CCCA National Tour in a few weeks, and we think we will be the oldest car on the tour. That means that we will have to "push" the car a little more than normal (note, I said push, not thrash).

The added protection of the GL-5 in both the trans and especially the differential would be welcomed; if for no other reason than to put us at ease.

Thanks again,
Pat