emr
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treeguy U are using what the Army uses, how can that be confusing... ![Driver :driver: :driver:](https://www.steelsoldiers.com/images/smilies/driver.gif)
![Driver :driver: :driver:](https://www.steelsoldiers.com/images/smilies/driver.gif)
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I think it was said a few times in this post that the TM manual calls for the 50 but the services use 80/90 EVEN though it calls for 50 in the tm they do not actually use it, why because its not important , that is were U are confused again, , so the hobby guys reading the tm want the product specified in the tm , thats fine for them, and in this post it also says the gl numbers are compatible with all parts, meaning any brass parts... some were afraid would disappear if they did not use the newest of new oils, but these trucks have been the same since 1950, and all the oils these guys are talking about are good, i felt you were worried about the wts , the way i took it, and it just is not a problem, or the gl numbers either for that matter, do not mean to offend , i thought it was clear they all work and have been working in these trucks for years, its totally a personal preference ,good luck, ,emr, Flyingvan is talking about SAE 50, GL-5, and GL-1. I am not familiar with these and how they apply to the deuce if the army calls for 80/90?![]()
sorry what i meant is your truck came with the 80/90 and is fine, 40/50 is better but we will never see a difference. in our use of these vehicles, unless U live in extreme cold climates. then the lower wt will make a difference.treeguy U are using what the Army uses, how can that be confusing...![]()
to be honest the guard units by U run anbrand cheapest bid 80/90 an they are fineI just changed the lube in mine because of a winch pto instal and I used the lucas 80/90 gear oil and didn't think much more of it until i ran across this thread and when i first seen the term "Yellow Metal Safe" i just nearly sh*t my britches ran into the garage and checked a bottle that i had left over and it said that it was MT-1 so that made me feel better. I have noticed that the shifting was a little different than it was before. Some gears was easier to get into and some a little harder. I am going to keep an eye on this to see how it goes. I'm in Kentucky and sometimes it gets cold but mostly around the 30-40 degrees mark.
You are looking in the military's version of what goes in there. Try going to the manufacturer's recommendations. They spec 30-50 oil.Looking at the lubrication order 9-2320-209-12-1 from 1983, it calls for 80/90 GO. I don't see any mention of 50W for the transmission or transfer case.
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