Guys, hello,
The reason I changed mine was because my friends Merc 240E was experiencing slippage and some local garages said that it would require a full torque converter change and clutches on the autobox. This vehicle has only done 73K mileage.
But, when we got the G/Box filter and oil changed on the merc, there was no slippage whatsoever and saved a lot of wonga, approx £2K was a lot of relief.
This got me worried as I have 90K on my clock had never heard of this or ever changed the filter/strainer on my LC 100. Therefore, I took on the task of doing so, to avoid a hefty bill later on and I must say that my gearbox feels much quieter, smoother on changes and it actually feels more spritely.
So I am not sure if anyone needs to change theirs, maybe its not required on Landcruisers, but, the amount of gunk that came out of the strainer and the bottom of the gearbox sump, makes me feel that its definetly worth changing or cleaning out every so often maybe 35K is a good time.
Anyway guys I posted it for information sake and not to panic anyone.
Keep trucking amigoes......