Technical Banjo rear grease

I'm draining and refilling my "47 ford truck banjo rear end. Any suggestions on what lube to use?

 

90 weight gear lube.

 

I use Sta Lube 140wt in my banjo and my trans. Seems to work well but I think 90 is the norm.

 

They had 600 weight in them in the old days but it isn't available. I run 160 in mine but even that is hard to find, run the heaviest weight you can find.

 

I got some from Macs and it was sold as 600 wt. It may or may not be the equivalent of 600 wt but the stuff is damn thick. If I recall correctly the way I got it in was to warm it up, attach a 3/8" dia. piece of clear hose about 2' long, held it up above the banjo and squirted it out of an old Lucas oil bottle. I have a friend who used an electric pump and that worked as well. Good luck.

 

Model A used the 600w in the trans because of no syncros [works great in a Crosley trans] and maybe the rear end but I don't think a 47' would need more than 90w..

 

LOL 600 wt is about like gun grease. I can't imagine trying to put it in a rear anyway but with a pump.

 

If You Want IT To Last On Long Trips 600 wt Is The Way To Go. I Have Over 270,000 Miles On Mine. [ IMHO }Do What You Want.

 

90/140 w/some STP

 

What they were calling 600 is about 140. They are two different Cl***ification Systems. The 600w is from the ISO 33348 Industrial oils cl***ification which is equivalent to 140 in the SAE J306 Gear oils cl***ification. There is no such thing 600 gear oil, the highest cl***ification I know of is 250. What was referred to as 600w is Mobile 600-w steam cylinder oil. Believe this is from MAC:

"600W is not a viscosity rating. It is a trade name of sorts originated by Mobil. It simply became universally used. The book (old and yellowing)that my contact used listed three products. 600, 600W and Super 600. 600 was listed as a pure mineral oil equivalent to SAE 140W. 600W and Super 600 were compounded oils or oils that were thickened. They were roughly equivalent to SAE 250W. The oil we use today as 600W is supposed to be a compounded oil equivalent to SAE 250W. The oil that we sell here tested to be just that but you should be careful. We now use a Lubriplate product called SRO 288. It is equivalent to SAE 250W from a viscosity standpoint but has better heat disssipating ability and is more slippery. The additive that increases viscosity in some products tends to make it course. The SRO product clings well also and we know where the stuff came from. Lubriplate also has an SRO 277 which is equivalent of SAE 140W. It is not multigrade. We recommend it in newly rebuilt differentials and transmissions.
Use it for at least 1000 miles. It flows better when starting out and it does leak. I would not use the 140W in steering boxes. These Lubriplate products are available from many bearing and drive component retailers. We sell them here also. So ask me what time it is I'll tell you how to make a watch. Sorry to be so long winded but to me the more you know the better."
Ray C

Ford never recommended this in a v8 rear axle. Believe the Ford recommendations are 90 or 140 depending on the operating temp.

 

THANKS for the choices AND the good explanations.

 

Hey--The stuff I drained out looked like dark gray 40 wt. oil. THAT wouldn't stick to the gears at all.?

 

You can get 600 at Grainger. But you have to but 5 gallon can. JB

 

Napa has 140wt Sta Lube and it's safe for br*** etc.