Chevy and GMC Duramax Diesel Forum - View Single Post - Service for your Allison, what do you guys do and use?
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post #2 of (permalink) Old 12-03-2019, 12:25 AM
caleb.broege
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I know the general consensus on the filter is to go OE. And the fluid depends on the yr of truck you have I believe the newer ones take a different fluid. Typically people donít take the pan out very often. Usually just change the external filter every so often and fluid. And then change the internal filter and check the magnet every once in a GREAT while. Hope Mike L will see this, he is the expert and his word is LAW when it comes to allison trans.


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