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If people read the post's then its clear from my post that Allison ok the MO. Knuckleheads had nothing to do with the MO. Once again Allison OK it. Reread my post #749 as I said well before you that the MO is used in off road trucks because of the high rpm, low ground speed's and heavy...

OK Rusty all the who has the biggest carrier bearings is a moot point. We all know how you get just ask CM Davis. Fact is I too have been a grease monkey most of my life but that was not enough for me as the ADHD will not allow it. Fact 2 is I bet 1/4 of this board can , will or have done...

Yes Hyd. oil can reach high temp but that will be before the cooler could reach 300* You would not want Hyd. oil operating at engine oil operating temps. There would be very little heat transference and the trans would fail for sure. Guess I should have stated sump temps. as motor oil runs...

There is nothing wrong with the correct motor oil in a Allison. https://fdlrd.swri.org/Allison/ApprovedFluidsList.aspx?Id=1 Hate to beat the dead horse but here is a Email from Mr. Johnson who was the Fluid engineer for Allison for many years. This is why it pays to stay at a Holiday Inn Express.

To me it was just a warranty thing. When Allison was part of GM they had there GM approved fluid and you would void your warranty if you did not use there product and oil changed at the correct millage. When Allison split from GM the same thing, got to buy GM oil and change at there times or...

I will take my chances with the MO that is in my transmission. Talk is cheap the transmissions are not. I have had not problems with the MO and yes the shifts are harder till she warms up. As said as long as the oil has a C-4 rating Allison said it would work. Just believe that the OP's should...

Yea and motor oil can go to a higher Tem. and not break down. Lighter weight oils can not so from what I have read because of the high engine speeds low ground speeds and heavy loads they decided to run motor oil. Even in any machine the Hyd. oil is half the temp. of the engine oil that is why...

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1325798 Now you can read this and believe them because it is on the web or call your Allison dealer. I have always found if there is not a problem do not make one.

Is the transmission giving you trouble. I talked to the Allison man and he said leave it alone as any kind of switch could cause a problem. If and when there is a problem then on rebuild we make the switch. Call you local Allison man and see what they say because there have been people that...

I am here bro. We also need our own space in the fourm as we feel left out:cry: We is Billy D and me.