The P0735 code in your 2020 Dodge Charger indicates that the transmission control module has detected an incorrect ratio specifically in fifth gear. Your Charger uses the ZF 8HP 8-speed automatic, which monitors gear ratios closely to detect slippage or engagement problems.
Fifth Gear Characteristics
In an 8-speed transmission, fifth gear serves as a mid-to-upper cruising gear. It's used during moderate highway speeds or as an acceleration gear when passing. Fifth gear sees substantial use during typical highway driving, making its components susceptible to wear.
Common Causes in the Charger
Fifth gear clutch pack wear preventing proper torque capacity. The shift solenoid controlling fifth gear apply may be stuck or failing. Hydraulic pressure issues specific to fifth gear circuit. Valve body problems affecting fifth gear engagement. Speed sensor errors that manifest when calculating fifth gear ratio.
Symptoms You'll Experience
Slipping sensation during fifth gear operation—RPM rises without proportional speed increase. Harsh or delayed 4-5 or 5-6 shifts. The transmission may hunt between gears around fifth gear. Fuel economy may suffer if fifth gear can't maintain lock. Check engine light with P0735 stored.
Chrysler Diagnostic Process
Using Chrysler wiTECH, perform comprehensive transmission diagnostics. Monitor fifth gear ratio during steady-state highway driving. Compare actual to expected ratio. Check for solenoid function and adaptation values. Test line pressure in fifth gear. Review transmission fluid condition—the ZF 8HP is sensitive to fluid quality.