Posted By: wwillson
[cut open] Allison 29539579 spin-on filter for 1000 series trans in Duramax - 10/06/18 09:05 PM
This filter is from my 2018 Duramax. This is the original spin-on filter with a total of 8,000 miles. There is a small amount of metal flakes in the filter and only enough clutch friction material to discolor the media. I see no reason to change this filter more often than 25,000 miles. The magnet that mounts between the filter and trans body had a small amount of dark material stuck to it - probably a couple grams.