Description
Engineered to restore seamless acceleration and factory-spec hydraulic pressure to Nissan, Infiniti, and Mitsubishi vehicles, the Auto Transmission CVT Valve Body Assembly with Solenoids is a complete, pre-calibrated hydraulic control unit. Specially configured for Jatco CVT platforms (including JF011E, JF015E, JF016E, and JF017E series), this master valve body assembly unifies a micro-polished aluminum casting housing, a high-response ratio step motor, line pressure regulation solenoids, and integrated fluid temperature sensors. Over extended mileage, contaminated CVT fluid and thermal degradation cause spool valve sticking and solenoid coil fatigue, leading to severe belt slippage, shuddering during acceleration, gear engagement delay, and limp-home fault codes. Pre-tested on dynamic hydraulic test benches, this direct-fit valve body assembly eliminates pressure cross-leakage, stabilizes pulley clamping force against the metal push belt, and protects expensive transmission sheaves from catastrophic scoring.
Technical Parameters
| Category | Specifications & Technical Details |
| Precision Proportional Solenoid & Ratio Step Motor Array | Integrates high-response ratio step motors and PWM (pulse-width modulation) pressure regulation solenoid valves. Within millisecond-level response time, they precisely fine-tune the hydraulic circuit pressure of the primary / secondary pulley sheaves, achieving stepless ratio change with smooth switching. |
| Micron-Polished Aluminum Housing & Low-Friction Spool Passages | The valve body aluminum housing passages and internal steel spool valve cores undergo micron-level super-finishing, featuring extremely low fluid friction resistance. They effectively resist spool sticking and internal pressure loss caused by fine wear debris. |
| Dual Pulley Clamping Force & Main Line Pressure Stabilization | The optimized main line pressure regulation valve stably outputs instantaneous peak hydraulic pressure exceeding 4.5 MPa, ensuring the steel belt tightly grips the pulley sheaves under extreme high-torque conditions, fundamentally eliminating CVT transmission slippage. |
| 100% Bench-Tested Hydraulic Flow & Electrical Calibration | Each assembly undergoes professional dynamic hydraulic test bench simulation testing under cold and hot conditions before leaving the factory. Solenoid valve resistance and flow characteristic curves 100% match Nissan OEM TCM control logic. |
| Integrated High-Temperature FKM Viton Internal Seals | High-grade FKM / Viton sealing gaskets and O-rings are pre-fitted between each valve body plate and solenoid valve base. They possess extremely high oil corrosion resistance and compression deformation resistance, preventing hardening and internal leakage under 140°C high-temperature oil conditions. |
Applicable Car Brands & Models
Common indicators of a degraded CVT valve body include:
Vehicle Hesitation or Jerking (Shudder): Sudden shaking or shuddering during low-speed acceleration or when coming to a complete stop.
Engine Revving Without Speed Increase (Slippage): RPM surges when pressing the gas pedal, but vehicle speed increases very slowly due to improper pulley clamping pressure.
Delayed Drive or Reverse Engagement: Taking several seconds for the transmission to engage into Drive (D) or Reverse (R) from Park (P).
Diagnostic Trouble Codes (DTCs): OBD-II error codes such as P0746 (Pressure Control Solenoid A Performance), P0868 (Secondary Pressure Low), or P1778 (Step Motor Function).
Yes. Depending on the specific Jatco transmission generation (especially JF016E and JF017E), a CVT Calibration ROM Data Transfer or TCM Adaptation Reset using a professional diagnostic scanner (such as Nissan CONSULT or Autel) is required. This allows the Transmission Control Module (TCM) to clear old pressure learned values and calibrate fluid pressure characteristics to the new solenoids.
No. Replacing the valve body restores hydraulic pressure control and solenoid operation. However, if severe belt slippage has already caused deep mechanical scoring or grooves on the pulley sheaves, or if the metal belt is fraying, the entire transmission must be rebuilt or replaced. Replacing the valve body early prevents this mechanical damage from occurring.
Each valve body assembly is thoroughly drained of test fluid, coated with anti-corrosion protective oil, and vacuum-sealed in a heavy-duty moisture-proof polybag. It is then nested in custom-molded shock-absorbing foam inside a reinforced cardboard box. Export orders are master-boxed, corner-protected, and stretch-wrapped on export pallets for safe long-distance transit.
