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Old 09-15-2014
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birds_first birds_first is offline
RV Appraiser
Join Date: Jan 2008
Location: Louisville, KY
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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 optimum word here was REBUILT, I know of too many guys who changed flavors of oil in the past just to find out after they developed leaking seals it was not a good ideal. If you had a complete rebuild that is a different story, it's almost like starting with a new transmission. I believe there is a difference but it ain't my transmission just saying.
John McGinnis,
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