Well little update for those interested in the working or maybe demise of my gtr gearbox
Been finding it hard to find the time to work on this so came in today to start stripping it down bit by bit and gotta say I'm now getting to understand how this thing actually works and how the twin electro hydraulic clutch system works in relation to gear selection but basically each of the solenoids in the clutch pack assembly is linked directly to its neighbouring solenoid in the main gear housing.
So ecu tells the solenoids that a shift has been made by driver and at that precise moment one clutch disengages the gear and other clutch is hydraulically depressed simultaneously which engages the next gear
so the really clever part with these boxes is actually the software written into the gearbox ecu.The timing has to be perfect in order not to crunch a gear which would be catastrophic given the power / torque and sheer speed in which these cars can select gear.
So I set about finding out what damage may have been caused by mixing the water with the fluid and that means a total strip down of the box (well at least the front and centre sections) as these both contain the electro magnets and solenoids which use very expensive hydraulic fluid in order that they are able to perform gear shifts at lightning fast speed so it's paramount that all solenoids are not hindered by shitty contaminated oil which can restrict the movement of clutch and gear select solenoids so a simple flushing of the system is nowhere near sufficient unless you want to end up with one big pile of smashed gear components
So from this
It now looks like this
That's just the front section which contains all the clutch basket and many drive plates, 4wd diff gear, hydraulics and solenoids that operate everything. I still need to totally strip down the solenoid packs and check their operation but the vlutch drive plates all look to be OK which is a good thing as they are very expensive.
Next will come the main gear section housing itself which needs to be split from the rear section that contains the rear diff etc
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