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I did not talk about different oils to him. I should not have said that as it will run cooler with ATF. From what I have been reading with oil it takes just a little longer to thin out and over heat. So much reading but also looks like with oil and outside temps. lower than 50* it needs at least...

Thanks for you input. In the thread I posted about the M35 transmission fluid question post #83. You said after it looks like there might have been some transmission having trouble after a swap. "Although my transmission is working fine. I am starting to get nervous". When you guys say that I...

Yea I called the friend at Allison and asked him when I could bring mine in for the swap. He said he would hook it up to there blowy sucky machine and no problem. I failed to follow through as other things always pop up when your old, grumpy and tired.

Just trying to learn myself but I do not under stand. Does the Allison HT740 and the MT654cr have Helical cut gears? They seem to be running engine oil or a sae10 weight. Mine on the HT740 is 10 weight. Thought there was also something about the oils to be used in 95* and above and also if used...

To be clear I am "not" persist about using engine oil. As I said I worry the switch out will cause mine to fail. As glcaines Allison tec tip said must be done correct and to get all the old engine oil out. As I said my friend that runs the Allison shop that reprogramed my computer said for "me"...

Thanks for the clarification. Yea I like to research and do not like to go by one person opinion as said "anyone" can "claim" anything on the web even lie. As I said some of the bigger transmission trucks like the HEMTT had problems with the switch. Do not know all the facts and if heat was the...

Just to be clear I would never say engine oil peforms better than ATF on road in the Allison. My only fear is I will be the one that with the switch has a problem. I think I will just stay with the engine oil for now in the 915A2. If it has a problem in my life time then since my motor is...

The old saying if it is not broken don't fix it. I never had a problem with my A3. My Allison in my 915A2 has engine oil and no problems so far and thousands of miles. After talking to the Allison fluid engineer that ok engine oil in our trucks back in the day I left mine alone. He also said the...

Would seem if you switch to ATF as long as you do not over heat the oil / the transmission then all might be good. Engine oil was approved buy a fluid engineer that I posted here. There were some problems when some switched to ATF in the bigger machines. The engine oil kept the transmission...