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Old 06-05-2014, 10:43 AM   #1
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Tranny Fluid

Allison recommends Mobil1 Delvac for the transmission. Is there a acceptable substitute? That will be compatible with what's in there now?

I'm replacing the external filter and my neighbor said I should re-fill the new filter with fluid before screwing it on.

Boowho??
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Old 06-05-2014, 10:59 AM   #2
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Originally Posted by boowho View Post
Allison recommends Mobil1 Delvac for the transmission. Is there a acceptable substitute? That will be compatible with what's in there now?

I'm replacing the external filter and my neighbor said I should re-fill the new filter with fluid before screwing it on.

Boowho??
In my opinion, there is no substitute for Mobil 1 motor oil, transmission fluid or differential grease. It is the best on the market. Filling filters is a good idea as the engine, transmission runs less time filling the filters. Have filled filters since I started changing oil in 1954 under my Dad's orders.
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Old 06-05-2014, 11:05 AM   #3
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Boo,
I think that all the coaches come with Castrol Transynd synthetic transmission fluid. I know my '08 did and my '14 also. Mobil Delvac should be compatible with the Castrol. The fluid costs about $30/gal.
Tom
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Old 06-05-2014, 05:02 PM   #4
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Boo
I am a member on IRV2 and their is a great retired fluids engineer that contributes on that forum. It's under drive trains in think. Not hard to find and some great info.
Phil
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Old 06-05-2014, 10:30 PM   #5
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Thanks all......

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