Update on this gearbox horror story...
Good News... vertex swapped out for Motul 300LS and this has completely changed the drive. Front is now much less binding and sounds almost silent, back to how is was but with better gear selection. Very happy so far... however..
Bad news... My DCCD light is not working... Shortly after the vertex oil was used, I noticed an occasional DCCD indicator flash "some might say - flashing green "O"..." and the scroll not changing dash light (when flashing of course). This happened maybe 2 or 3 times after running the vertex stuff, but was reset and okay after a stop/start. Then, I had it tuned and was run up a few times on full lock on the dyno, since then, solid DCCD flash on IGN.
I know orange is not advisable on tarmac and lock would be crazy.. but I have "momentarily tested" various settings on the road (when the DCCD flash first started those couple of times to try figure out WTF is going on) - is this enough to damage it? - but other than that, its only ever set to OPEN or one click up (still green)
My limited understanding is that the DCCD flash could mean a number of potential causes, DCCD scroller, DCCD controller, handbrake sensor, dash, wiring to DCCD unit itself. Also steering angle sensor and ABS, however I don't think mine has either of those, definitely no ABS. I understand the DCCD itself is relatively simple (an electromagnet) but there seems to be a number of bits to make it all work.
After swapping vertex for Motul, I'd hoped that the flashing would stop.. I know, wishful thinking... it hasn't.
I've since disconnected battery, left off for 24hrs, and was excited to see it didn't instantly go from orange LOCK lite, to green O flash, flash on IGN, instead, for the first time since tuning... it stayed solid until I drove 200m down the road...
However there is a slight improvement since the battery disconnect reset, although it mainly jumps straight to flashing on IGN.. BUT very occasionally, will not instantly flash.
It somehow managed to not flash long enough for me to prove that the scroll works, dash lights work with the scroll setting, and it mechanically feels like its functioning "slow figure 8's in gravel in LOCK" and she felt like its locked to me - which I think proves its not a failed fuse or relay and the handbrake unbinds/unlocks when in LOCK proving that the handbrake sensor is okay. So I have hope its not completely stuffed. I had a feeling that switching on IGN on an incline helped it to not instantly flash giving me a chance to begin trial and error tests, but seems to be more my imagination than fact, and it really does seem random when the flash stops long enough to left me test things.
Anyway... not sure what the next step is, to me it feels like a loose wire, bad earth somewhere that possibly a result of the feedback (shuddering) when running Vertex.
BTW, The people who swapped the gear oil over tried to get diag codes "ie count the flashes" off the DCCD controller/ECU but failed to get it to provide them.
So, any info, insight, links to how to get DCCD codes off a TY752VB5CA, or wiring diagram for V3 Type-RA DCCD would be highly appreciated...
Thanks