With frequent enough fluid changes, you should be good to go to not have to replace the strainer/filter on every fluid change, and looking at pictures of the strainer/filter show that is is not likely to be filtering out the friction material anyway, at least effectively. There are also no valve bodies or any other small orifices that can become clogged with excess 'sludge'.ĮDIT: I don't really think that changing the strainer/filter in the pan is that necessary at very low intervals - my biggest worry would be actually chunks of something getting sucked into the pump and being pushed through the valve body/solenoids/etc. I wouldn't expect a filter for diffs or the t-case, as they don't have friction material that is going to be floating around, and even if they did (for limited slip differentials for example), fluid change intervals should be high enough that the excess friction material is removed.
engine oil vs transmission oil), the transmission most definitely will become contaminated over the course of time with friction material from the 4 clutch packs.
Click to expand.While I agree that they aren't the same (i.e.
