Posibil , eu sunt convins ca 80% din cutiile de la 7P nu au uleiul schimbat niciodata , a mea macar am schimbat odata si o sa schimb si a doua oara
Poate mecanicul ala vorbea de cutii la care se schimba uleiul la intervale mici si la care nu s-a schimbat niciodata ... e clar ca exista multe asa
Am citit si eu ce se spune dar nu inteleg cum uleiul cu pilitura compenseaza uzura , mai degraba accelereaza uzura dupa mintea mea
Pe principiul asta bagam nisip in ulei sa fim siguri ca se compenseaza uzura complet
Uleiul nu se inlocuieste in totalitate la cutia Aisin de pe 7P ( decat cu flush , nerecomandat )
La mine problemele nu au aparut imediat dupa schimbarea uleiului ci la 70k dupa , parerea mea este ca nu schimbul de ulei a dus la eroare ci o uzura in timp sau ... altceva
O sa verific la revizie si daca nu exista cumva scapari de ulei la cutie , la ultima revizie acum 13k nu au fost
Deoarece nu ma pricep si nu exista nimeni in zona care sa se p[riceapa la cutii , o sa testez singur comportamentul in timp
Resetarea cutiei din interfata nu cred ca o sa fac
Pana voi gasit o firma care sa faca o diagnoza ok la cutie , voi schimba uleiul si voi monitoriza continuand sa conduc pe S
17113/P0729 - Gear 6: Incorrect Ratio
Possible Causes
Wiring and/or connections faulty
Sensor Gear Position Indicator faulty
Mechanical failure
Possible Solutions
Check wiring and connections
Check Sensor Gear Position Indicator
Check Gear Solenoides
The VW Touareg 7P P072900 fault code indicates an intermittent mechanical issue where the transmission cannot achieve or hold 6th gear, often due to faulty solenoids, valve body issues, or low/dirty fluid. The TCM detects this when expected input/output speed ratios do not match for 6th gear.
Potential Causes for Touareg 7P (Aisin Automatic):
Valve Body/Solenoid Failure: The most common cause for intermittent, load-dependent P0729, often due to worn solenoids or a failing valve body.
Transmission Fluid Issues: Low fluid level or dirty, contaminated fluid.
Mechanical Transmission Damage: Internal clutch or gearbox damage.
Wiring Issues: Faulty wiring or connections between the transmission control module and transmission.
Recommended Diagnostic Steps:
Check Transmission Fluid: Verify fluid level and condition (check for burnt odor/debris).
Scan Tool Data: Monitor live data for solenoid operation (specifically solenoids related to 6th gear) and input/output speed sensor synchronization.
Perform Valve Body Test: Test for pressure loss. Many technicians recommend inspecting or replacing the valve body if solenoids check out, as they are common weak points in these transmissions.
Wiring Inspection: Check transmission wiring harness connectors for corrosion or damage.
Disclaimer: Intermittent faults can be tricky. If fluid is clean and levels are correct, focus on the valve body/solenoid assembly