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Old 09-15-2014
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NealinNevada NealinNevada is offline
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Join Date: Apr 2013
Location: Sea of Sage, NV
Posts: 1,126

Originally Posted by lucaswillemse View Post
When I had my Allison rebuild 3 years ago 15-40 engine oil is what they installed and recommended. This is one of the biggest truck transmission specialists in the Los Angeles area. The transmission has performed without any trouble for over 20,000 miles.
The Army specs 15W-40 for all the Allison trannys in their current equipment lineup.

1994 WB40 and a slow '73 Nova SS
Palomino Valley, NV

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