Join Date: Jan 2013
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Suck the fluid out of hydraulic tank and refill with fresh new fluid.. drive the car for a few mins and repeat.. try to flush some dirty fluid out of the system... see if that helps.. of course remember to bleed the block and slave cylinder when done via dis or ista.. cheap and easy try..
Next step, if the above doesnt help, would be to drop the trans and swap the shifting solenoids on the shifting block on top around and see if the issues follows that specific 6-7 solenoid to say in place of the 3-5.... If it does follow, then you know the solenoid is bad and its a, simple solenoid change and that its not the actual trans itself..
Of course after this swap, it will need a trans adaption via dis or ista..
Solenoids swap, This would be done after verifying that latest oem softwares have been flashed, smg hydraulic system has had both bleeding procedures done, trans oil fluid level is correct..
Only things i can think of to troubleshoot this before getting a new full smg hydraulic system..