http://www.nagtroc.org/forums/index.php?showtopic=46752
This thread is in direct response to the needs of user - GT3240X2. This guys GTR has experienced two of the most common problems we are seeing now with the GR6 transmission in the GTR. This first of these is Line Pressure Sensor failure. Normally when this happens the transmission goes into limp mode and displays zero pressure on the dash. Replacement sensors are not available so we engineered this solution for it - WR35TPU (Transmission Pressure Unit), which replaces factory line pressure and/or Clutch Pressure sensors.
First up you remove the valve body and unwind the factory sensor as pictured.
Now our WR35TPU unit we choose to mount remotely. There are a couple of good reasons for this allowing simple access should it ever require changing again, and also so we can use a larger bodied and different spec sensor in the aim of better durability.The new WR35TPU sensor comes with the braided line, wiring etc. to make it a plug and play fitment.
With WR35TPU now installed it mounts up neatly alongside the valve body of the transmission and does its job. In fact save for a small section of the braided line being visible you wouldnt even know it was there
Second problem is Synchro failure. The large chunks some folks are finding in their oil and on their magnets are the nicely machined teeth from the stoppers on the synchro dog rings in the transmission. Most commonly 4th gear ring breaks, sometimes first, sometimes second. The result is damaged synchros and the possibility of an over-selected gear which can lead to gear failure. This is a design problem and not dictated by driving style, power outputs, or brand/type of lubricant. Our solution to this problem is simple, affordable, but took many hours of design work. We call it WR35GS (Gear Stopper). Let me explain how it works -
Evidence of over-selection and synchro failure in the transmission are these little black teeth on the magnets throughout the box. Failure is not too far away at this point. It can happen to anyone, anytime.
To fix the problem WR35GS modifies the throw of the transmission so that the selector simply cannot bounce off the dog ring on the back of the synchro and cause this damage. We modify this action at the valve body which requires the piston covers be removed (simple job).
Our WR35GS gear stoppers then locate between the piston and the end plate to effectively limit the throw of the selector and keep the vital internals of the transmission from bouncing off each other then turning to metal schrapnel. A simple design yet extremely effective, and tested to work and emiminate the chance of damage in the gearbox.
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