SWMARTINA
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very nice photo. Bill
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trans fluid - M923A2
- Thread starter FXR1969
- Start date
- 91
- 1
- 8
- Location
- Greene County In
nice pic!!!.....what did it weigh?Please by all means change yours out and tell us how that goes. I wish you all the luck with that but I am going to keep using what came in mine and I use my trucks. Like this yesterday.
Csm Davis
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200,000 + 18,000 weight on fifth wheel
- 487
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- Clayton, Illinois
I know someone that used that Allison approved fluid in his 929 because he called Allison and that's what they told him to switch too. He had to rebuild the transmission that was working and shifting perfectly fine with the 10W oil a week later after he put that fluid in. I'll stick with straight 10W non detergent motor oil in my M929A2. I actually work my truck everytime it goes out weather it's pulling a 36,000# excavator or hauling off-road. Even pulling a steep grade with the excavator behind it in 1st gear because that's the only gear it will pull that grade in the trans temp never goes any higher then 160-180
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- 487
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- Location
- Clayton, Illinois
I know someone that used that Allison approved fluid in his 929 because he called Allison and that's what they told him to switch too. He had to rebuild the transmission that was working and shifting perfectly fine with the 10W oil a week later after he put that fluid in. I'll stick with straight 10W non detergent motor oil in my M929A2. I actually work my truck everytime it goes out weather it's pulling a 36,000# excavator or hauling off-road. Even pulling a steep grade with the excavator behind it in 1st gear because that's the only gear it will pull that grade in the trans temp never goes any higher then 160-180
idbankrman
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- Castle Rock CO USA
I have owned 12 939A2 trucks and still have five. Three trucks were completely drained of all fluids. Of the trucks that had fluid in the transmissions I was never sure of what was in them other than that it wasnt Dexron III. I would like to continue using whatever was already in the transmissions but I cant tell what it is. Anybody know of a good methodology to determine the type of fluid that is in a transmission? Seems like alot of people here are sure of what's in theirs so there must be a way.
idbankrman
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Also I have had no luck finding 10wt oil. Much less 10wt with a C4 specification.
Csm Davis
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They all started with 10wt.
Csm Davis
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Look for ISO32 or AW32 hydraulic / transmission oil
- 91
- 1
- 8
- Location
- Greene County In
I just changed my trans fluid and used 15 40 because i have over 50 gallons on hand.......So hy/trans would have been a better choice?
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15-40 will work just fine.
Csm Davis
Well-known member
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Possibly check and see if your oil is C4 certified it will probably be fine either way, I wouldn't think the difference between 10wt and 15w40 is going to be a lot the main difference I see is detergent additive not sure how much that will affect the transmission. If I could not find any 10wt and had to get back on the road 15w40 or any other C4 class would be my second choice. See what the earlier discussion didn't get into was yes the 15w40 saved a little bit of money in logistics if it were to have drastically shortened the life of the transmissions the military wouldn't have made the change because they already have to keep 10wt hydraulic and transmission oil on hand for the wreckers and other equipment that use it. I'm also sure that if we looked we could find the new transyn oil in the system also, the military is not going to make a switch to a oil that would deadline thousands of trucks or have them break down in a fire fight just to save a few 100,000 dollars. I am sure if Allison thought that 15w40 would destroy the transmissions and leave just one soldier in harms way they would be raising cane at the military and the guy's on the ground would be also, trust me mothers of America have tremendous pull with the DOD. It just doesn't work like many people think it does.
- 91
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- 8
- Location
- Greene County In
It is Rotella 15w40 API CI-4 PLUS, CI-4, CH-4,CG-4,CF-4,CF,SL, SJ, SH ......Didn't see just C4...
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Composite native
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That’s so cool she looks looks strong must feel good to be able to pull that kind of weight love it great thread here I’ve always enjoyed the intelligent, bickering back-and-forth. It’s a trip.Please by all means change yours out and tell us how that goes. I wish you all the luck with that but I am going to keep using what came in mine and I use my trucks. Like this yesterday.