What Gear oil for diffs & Gearbox's?
 

Dipping into the great wisdom of Mluers

I know this question has been asked before & if you can guide me to the thread that would be great.

1941 Chevy truck - what gear oil goes into the Gear box and differential?

Ive got Caltex Thuban Gear oil EP. SAE 85W - 140 API GL-5. I remember reading something on here about EP meaning Extreme Pressure. This means this oil may have additives that attack Brass??? Is that right?? Are there brass or copper components in either the gearbox or diff in the Chev truck?

Many thanks

EP Additives
 

Tony,

The gears in your boxes are different, but can use the same oil.

The straight cut gears in the transmission have simple lubrication requirements, and will live on 'average' gear lube.

The gears in your differential are bevel gears, and need the extreme pressure lube as those gear teeth slide by each other. Those additives are essential to get the most life out of a sliding gear set.

The additives will not hurt brass components, as the synchonizer bits of a modern transmission.

The worst modern oil is better than the best oil of years ago, and despite what the sheiks would have us believe - oil is cheap.



Stewart

Thanks Stuart
 

Great info Stewart,

Finally got the box out of the old girl today - the first time its ever been out.

Took the top off and the inside is like new!!!

What is your outside temperature range?
 

Hi Tony,

Couple of questions to help narrow down what information might be of help.

First where is "Ganmain” and what is your normal out door temperature range?

Are you talking about your F60L?

If google is correct Ganmain must be in New South Wales, and if what I read on http://www.coolamon.nsw.gov.au/files...inSnapshot.pdf
is correct 21.9-6.3C (71 to 43 F) the chamber of commerce information you have a lovely climate. It also means that you can probably run any mid temperature range modern oil. With leakage and seal life being more of an issue if the gear lub is to thin.

Over the last 30 years driving my HUP have gone from straight 90 Weight Hypoid to running the SAE 85W-140 which seams to be fine operating in any of my three trucks with out side temperatures up to 35 C – 95 F gear box, transfer case and differentials never have gotten too hot to the touch highest I’ve ever seen is 150 F – 65 C with an infrared thermometer and that was after more than hour at full speed. The multi weight lub has seemed better in cold weather. Leakage rates are more of an issue at higher temperature, new seals and speedy sleeves seem to be the answer to that problem.

Though you don’t get temperatures like this in your area at lower temperatures below 10 F -12 C the straight 90 along with the grease in the front drive shaft steering balls make it so that it requires 4 wheel drive to move the trucks on smooth snow. Without the front end engaged the wheels don’t turn they slide. The straight 90 also makes it very hard to shift gears or to shift the transfer case.

C'mon Phil!
 

Firstly, EVERYONE should know where Ganmain is! (shouldn't they???)

As for our climate. year-to-date stats... ((Real official stats from our nearest airport, Narrandera))
average rainfall to Nov 431.5mm 74.6 day(s)
total for 2009 242.8mm 63 day(s)
total to this day 2008 281.3mm 59 day(s)
wettest day 22.6mm Apr 4
lowest temperature -2.6°C Aug 9
highest temperature 44.4°C Feb 7

You must add your name to the list of MLU visitors some day!

Who needs to add name to "list"
 

But really the community web sites make Ganmain sound and look like a nice place.

Cheers Phil

Another Ganmain fact
 

G'day Howard,

What about due to the population of Ganmain it claiming the title of the town with the highest ratio of CMP vehicles per head of population in NSW? Hey the place ain't that big after all!

Kind Regards
Lionel

Don't you know to take everything you read on the Net with a grain of salt?

Typical overseas perceptions of Australian weather is that everywhere is just one rainstorm away from Desert conditions.

Lithgow is just Sheer Bliss.

G'day Phil
 

Phil

Temps range in all honesty from 0 C in the winter to 45 C in summer. No that's not a typo, I repeat 0 C winter to 45 C summer.

Info was for 1941 Chevy truck but Im interested to hear about the F60L as well. Stewart Loy gave me some practical info. If you can add to it, its all carefully stored in the memory bank. :coffee

Personnally I have used.....
 

....good old fashion Canadian Maple syrup.......


....once the CMP has been decently warmed up .....you can toast the bread on the manifold and run underneath to catch some fresh drippings......

Hum good !!!! sure keeps you lubbed up.

Boob

PS.... Don't laugh.... you guys eat vegemite....!

Well actually
 

Actually Bob ,

I have eaten genuine Canadian Maple syrup, at the Hedges place. Very very good stuff. Havent tried it out of a Blitz Manifold though.......is there a strict Canadian ritual to follow???

Challenge to you Canucks....... try some Vegemite & dont go crazy with the amount - THIN scrapings on HOT toast with lots of butter. The essential effect is it makes the butter saltier.

Warning, if you spread it like Jam or Peanut butter with out being a seasoned veteran - youll reply to this thread in abusive tones!!!

Go on! Give it a go!

Marmite is far better then Vegemite guys :D :thup2:

Confused by Cliff......
 

A "marmite" is the pot you cook the pork roast laced with homegrown garlic.

After supper, we take the marmite and leave it outside in the cool Fall air for the crunchy fat to congeal....... the next morning you scrape the marmite's bottom and spread it on fresh bread..... the scrappings are called "minoune". and loosely....very loosely translate from French to what you would call a young kitten....P****

BooBee

Bob, are you sure it is pork you put in marmite and not marmotte?

Marmite and Vegemite
 

Hello Bob,

Just to clarify what Cliff and Tony were talking about see the pictures. Also how to apply marmite and vegemite and what can happen if you have too much of either. Thanks to Google image search for the photos

Kind Regards
Lionel

Thanks for the Question Tony
 

G'day Tony,

I would have posted the same question so thanks Tony. When I was towing my Chevrolet into the shed it took a couple of attempts and it was getting dark. So with the truck just a little bit too close to one side of the door frame I took a short cut. Instead of pulling the truck forward - yet again, with Leeann steering the truck while I operated the tractor I did a sideways pull. I figured that the tyres were already stuffed so what could it hurt? The chain must have been pulled against the diff backing plate during the pull. Next morning there was this unique old diff oil smell permeating through the shed and a nice big black pool on my new shed's floor.

Bugger just another thing on the “to do” and “not ever do again” lists. It also joins the “Well it did seem to be a good idea at the time” list too.

Kind Regards
Lionel

Food for thought
 

G'dayTony

Next time you are spreading your vegemite nice and thick on your toast - something to think about.

Kind Regards
Lionel

Tassie Devil Howls
 

If every jar of Vegemite came with one of those I would spread it like peanut butter!!!

& not just on the toast :eek:

Lionel
 

Can you please post larger pictures(the last one anyway)...And that stuff under the truck,......thats Vegemite.