best gear oil for deuce

[plym49]

No, that's not what was recommended. The recommendation was GL-5 80W-90 in the axles and STRAIGHT 40w non-detergent in the transmission and transfer case.

 

[JimmyThompson]

Ah'. Forgive me, I literally just bought my truck and want to change the fluids and I def' want to but the proper stuff in it.

I've never heard of "STRAIGHT 40w" before, excuse my ignorance. How is that different than 15w-40?

 

[welldigger]

Yes gl-5 for the axles and 40wt non detergent motor oil for the transmission and transfer case. If you have a tractor supply near by get the red labeled traveler 40wt oil. Its the non detergent variety. Then go grab a bucket of the traveler 75-90wt (I believe that's the weight) gear oil. That will cover everything but the engine.

 

[plym49]

'Straight' menas that it is not multi-viscosity. It is just 40 wt, all the time. Multi-viscosity oils change viscosity based on temperature.

15W-40 is not the same as 40 weight oil. You want 40 weight oil. Straight 40W.

 

[JimmyThompson]

Ok, so:

Motor Oil: 15w-40 (Non-Detergent??)
Transmission & Transfer Case: 40w Oil (Yellow Metal Safe??)
Differentials: GL-5 ??w-90

I've already purchased the 80w-90 from Napa and I'll try to return the fluid tomorrow. However, if they only allow an exchange, I reckon I'll ask them to find, via the specs above, their comparable fluids. Worse case (no return/exchange) the stuff I got will work correct?!!?

Thank you all for your patience. For that it's worth, I have read tons of pages on this forum regarding fluid recommendations and all the numbers and stuff kind of run together at the moment.

 

[doghead]

GL-1, as you posted in #35, is what the military used for the trans and t case and axles

Be sure you are using a diesel rated engine oil (like Rotella).


Simplify, you only need 2 oils.

 

[plym49]

Ok, so:

Motor Oil: 15w-40 Detergent
Transmission & Transfer Case: 40w Oil NON-DETERGENT
Differentials: GL-5 80w-90

Now print that out, staple it to your forehead, and go see the nice man at the parts store.

 

[JimmyThompson]

Yes gl-5 for the axles and 40wt non detergent motor oil for the transmission and transfer case. If you have a tractor supply near by get the red labeled traveler 40wt oil. Its the non detergent variety. Then go grab a bucket of the traveler 75-90wt (I believe that's the weight) gear oil. That will cover everything but the engine.

The "Red Label" looks as though its 30w not 40w per their website. The "Blue Label" appears to be 40w and it doens't specifically list the oil as "non-detergent" as the red labelled 30w did. Clarification needed please.

 

[JimmyThompson]

now print that out, staple it to your forehead, and go see the nice man at the parts store.

lmao

 

[welldigger]

The "Red Label" looks as though its 30w not 40w per their website. The "Blue Label" appears to be 40w and it doens't specifically list the oil as "non-detergent" as the red labelled 30w did. Clarification needed please.

Just go to tractor supply and read the label. The blue bottle is standard motor oil. Red label is non-detergent. The 40wt is usually only sold in 2 gallon jugs not quarts.

 

[JasonS]

The recommended engine oils for the transfer case have an API rating of CD, CE, SF, or SG. These are detergent oils.

 

[emr]

No filter > non detergent, filter >detergent. Like doghead said, 2 oils engine and drive line. With that said, You will never have a problem running straight 30 in your engine, ever. 15/40 better , ok.... 80/90 drive train. some more 2 cents's.Unless you live in extreme cold, then 40 drive train.....

 

[JasonS]

No filter > non detergent, filter >detergent.

Except that Rockwell specifies detergent oil for transfer cases.

 

[JimmyThompson]

Except that Rockwell specifies detergent oil for transfer cases.

Which puts us back to square-one!

There appears to be NO consensus about fluids. This person runs GL-1, that person runs GL-5, one guy uses 30w, another uses 15w-40... No wonder I'm confused!

 

[welldigger]

15w-40 is used in the engine only. Nobody is arguing that one.

 

[plym49]

Not really. You originally asked what was best. Some pretty good advice was given.

OTOH, these are old, primitive trucks. The lube that was current when they were new works fine, and anything newer (i.e., 'better') works, too.

So, pick your poison and go to town. It does not really matter.

 

[welldigger]

Not really. You originally asked what was best. Some pretty good advice was given.

OTOH, these are old, primitive trucks. The lube that was current when they were new works fine, and anything newer (i.e., 'better') works, too.

So, pick your poison and go to town. It does not really matter.

Yup I'm done with this thread. If you can't read this one or the 15+ other threads and make a decision then I don't know what else to tell you.

 

[trukhead]

Yellow metal?

yellow snow?

 

[RodUSMC1962]

We used straight 90 w oil in everything but the engine when I was in the corps, straight 30 w in the engine. That is what I use in my 1952 deuce, no problem, still runs great,61 years old.

 

[muthkw25]

Is the Traveller's 40W Non Detergent compatible with Yellow Metal?