Powershift Primary Oil Filter Replacement

[AlanM]

Originally Posted by oldgun

the question is , do you have to replace that main filter which is only for big chunk of particles.

It's a paper filter, not a strainer, so it would get at least partially blocked by just the material that comes off the clutch plates. The magnets in these boxes get a thick coating of sludge on them, and they certainly wouldn't be as effective once covered like that. So that leaves the other two filters to keep the muck out. But the external one is in line with the oil cooler so only actually works when the oil is hot. All the oil constantly circulates through the internal one so having a clean one in there certainly can't hurt.

These transmissions rely on oil pressure to properly engage the clutches. The internal filter is on the suction side of the oil pump so restrictions here could quite possibly impact on the operation.