M35a2 oils

[Another Ahab]

I feel like a 1800 century Doctor who has just been informed of the new treatment for patients. It goes something like this; "What do you mean Blood letting is no longer an acceptable form of treatment ? How else are you going to get the evil humors out of the body ? " .
What else is going to change ? When will this madness end ?!?!?!

Man I'm with you. If your not confused enough already my f350 with the zf-650 takes atf. As does many other heavy duty gear boxes.

If you don't think about it then it makes sense lol.

Don't tell me this thread is coming to an end!! It's been way too much fun.

The madness must be kept alive, but HOW!??

 

[Katavic918]

40wt here. Probably change to 50wt. Also going to start adding zinc to the 15w40 in the motor.

 

[Katavic918]

Also, am I correct in assuming the same oil should go in the transfer case as well?

 

[Another Ahab]

Hallelujah! There's still some life in the old thread.

 

[rustystud]

Also, am I correct in assuming the same oil should go in the transfer case as well?

That depends. Normal transfer-cases (trucks) should still use regular gear oils. That includes the 50W "gear" oils, but most should still use 80/90W oils. Our transfer-cases do use synchros so they still recommend a lighter oil like the 50W or even better the 70W oil though you can safely use 80/90W oils. Thankfully the differentials still use 80/90W or heavier like 140W oils with additives for "extreme pressure" . These additives will eat yellow metals so they should never be used in "our" transfer-cases. Though "normal transfer-cases can use them.

 

[TB58]

So ideal would be 50w in the transmission and transfer with 80/90w in the differentials? I am running Delo 80/90w in everything right now, occasionally when everything is at operating temp 4th will grind on me. The rest of the gears shift just fine though.

 

[welldigger]

I have always suggested gl-5 (80-90) in the axles. They need the high pressure additives.

The transmission and transfer case don't

 

[Katavic918]

That depends. Normal transfer-cases (trucks) should still use regular gear oils. That includes the 50W "gear" oils, but most should still use 80/90W oils. Our transfer-cases do use synchros so they still recommend a lighter oil like the 50W or even better the 70W oil though you can safely use 80/90W oils. Thankfully the differentials still use 80/90W or heavier like 140W oils with additives for "extreme pressure" . These additives will eat yellow metals so they should never be used in "our" transfer-cases. Though "normal transfer-cases can use them.

Thanks Rusty. One more clarification before my head explodes. So we are talking about using "50wt non detergent motor oil" in the trans and transfer case? Not 50wt gear oil? Thanks.

 

[Another Ahab]

Thanks Rusty. One more clarification before my head explodes. So we are talking about using "50wt non detergent motor oil" in the trans and transfer case? Not 50wt gear oil? Thanks.

Please provide notification prior to detonation:

- Some of us are not wearing safety gear.

 

[rustystud]

Thanks Rusty. One more clarification before my head explodes. So we are talking about using "50wt non detergent motor oil" in the trans and transfer case? Not 50wt gear oil? Thanks.

Yes. Though I will still be using the 50W synthetic "gear" oil myself. I cannot give up 40 years of using gear oil to just use "engine" oil . There still are additives in gear oil not used in engine oil, but (sigh ) yes you can use 50W non-detergent engine oil.

 

[rustystud]

So ideal would be 50w in the transmission and transfer with 80/90w in the differentials? I am running Delo 80/90w in everything right now, occasionally when everything is at operating temp 4th will grind on me. The rest of the gears shift just fine though.

If you are experiencing grinding then I would go to a 75/90W gear oil. That is what most of the Spicer transmissions are using. See the previous chart from post #188 .

 

[frank8003]

No, this thread can't die.........

So I found that elusive technical paper from SAE but it just says to make an engine study.
Now I search for the newest SAE "study; laboratory engine test".
SAE technical paper below.
Cam and Lifter Wear as Affected by Engine Oil ZDP Concentration and Type
1977-02-01
Technical Paper
770087
Loren G. Pless, John J. Rodgers
The recent increase in excessive camshaft and lifter wear after extended service has shown that some SE-quality engine oils do not provide adequate protection. To determine the effects of oil additives on wear, controlled tests were run using 1972-1974 model cars, unleaded gasoline, and either SE commercial products or experimental formulations. Field experience with 1970-1975 model trucks, leaded gasoline, and SE/CC or SE/CD oils was also investigated. With some commercial oils, in both controlled tests and field experience, excessive wear sometimes occurred after extended service, even with recommended oil-change intervals. Generally, protection from excessive wear was best provided by those oils containing pre-dominantly alkyl ZDP (zinc dithiophosphate) antiwear additive instead of aryl ZDP. These results show that a laboratory engine test is needed to evaluate the long-term wear protection of engine oils.

I know it is from 1977, so what if it only took me three weeks to find a 38 year old comment?
I have a 46 year old truck. Maybe one day I'll catch up and watch color movies too.

 

[Another Ahab]

No, this thread can't die.........

I know it is from 1977, so what if it only took me three weeks to find a 38 year old comment?
I have a 46 year old truck. Maybe one day I'll catch up and watch color movies too.

And did you know there was an Internet, now? It's very cool!

 

[Katavic918]

Inherently it doesn't matter what I choose. I'll convince myself it was wrong in a couple months anyway. That's why I don't have any tattoos.

 

[rustystud]

Inherently it doesn't matter what I choose. I'll convince myself it was wrong in a couple months anyway. That's why I don't have any tattoos.

I wanted a Marine Corp emblem on my shoulder while I was stationed at Camp Lejuene. It cost over $300.00 ! That was half my monthly pay then !

 

[Katavic918]

At least you'll never change your mind about that.

 

[rustystud]

At least you'll never change your mind about that.

Very true.

 

[Another Ahab]

Inherently it doesn't matter what I choose. I'll convince myself it was wrong in a couple months anyway. That's why I don't have any tattoos.

I wanted a Marine Corp emblem on my shoulder while I was stationed at Camp Lejuene. It cost over $300.00 ! That was half my monthly pay then !

Some many tattoos showing up on personnel at Port Hueneme, that the Skipper threw a few into the Brig to put the brakes on all of it (and this is OLD school; it was a California thing back then).

He cited the UCMJ for "defacing government property".

Navy Brigs are run by the "Jar-ines" (and we all know they ain't right). You don't want to get thrown into the Brig. It was kind of funny. As long as YOU weren't the one doing brig-time.

 

[Tracer]

Just looked at a bottle of Lucas "Engine Break-In Oil Additive TB ZINC-PLUS" at my NAPA store. Says it protects flat tappet camshaft and valve train during break in. Designed specifically for racing applications, that must mean multi-fuel engines. (sarcasm) Anyone know anything about this product???

 

[rustystud]

Some many tattoos showing up on personnel at Port Hueneme, that the Skipper threw a few into the Brig to put the brakes on all of it (and this is OLD school; it was a California thing back then).

He cited the UCMJ for "defacing government property".

Navy Brigs are run by the "Jar-ines" (and we all know they ain't right). You don't want to get thrown into the Brig. It was kind of funny. As long as YOU weren't the one doing brig-time.

Yes we all know the Marines on brig duty all have a great sense of humor ! With not a sadistic bone in their bodies !