Remanufactured DCT270 7DCT220 Transmission Valve Body 1701410A6K for Bestune T77 Hongqi H5 1.2T Gearbox Replacement Parts

This remanufactured hydraulic valve body matches DCT270 / 7DCT220 dry dual clutch transmission, OEM numbers 1701410A6K / 1701410A6KA / 1701410A6KXX, compatible with Bestune T77 and Hongqi H5 1.2T factory equipped with 7DCT220 gearbox.

Valve body is the core hydraulic control unit of dual clutch transmission. Worn solenoids, stuck spool valves, aging internal seals and blocked oil passages will cause shifting jerk, gear slipping, delayed gear engagement, transmission fault codes and power cut-off. Our remanufactured valve body follows full OEM overhaul standards: all defective solenoids, worn spools and aged sealing rings are fully replaced with brand-new matched accessories; aluminum housing undergoes deep ultrasonic cleaning to clear carbon sludge and metal debris. Every finished valve body passes full-cycle hydraulic bench test, stable shift pressure output, direct plug-and-play replacement without complicated TCU programming after installation. A full set of matched sealing gaskets is attached to save your separate purchase cost.

1. Complete Disassembly & Deep Ultrasonic Degreasing: All internal hydraulic parts fully split; high-pressure ultrasonic washing removes carbon deposits and metal grit inside oil galleries.
2. Full Replacement of Vulnerable Components: Replace all malfunctioning solenoids, worn valve spools, cracked internal sealing rings with new OEM-standard matching spare parts; intact original aluminum housing is polished and inspected for deformation.
3. OEM Standard Torque Reassembly: All fixing bolts tightened strictly per Bestune factory torque specification to prevent internal ATF leakage under long-term high-temperature operation.
4. Multi-cycle High-pressure Leakage Inspection: Repeated hydraulic cycle testing to eliminate hidden oil seepage risks during long sea and land cross-border transportation.
5. Full Dual Clutch Shift Bench Simulation Test: Simulate low-speed creep, rapid acceleration, heavy load climbing and high-speed cruising to calibrate full gear hydraulic pressure logic; unqualified valve bodies are eliminated completely before shipment.
6. Heavy Shockproof Wooden Box Packing: Independent solid wooden case with full foam inner buffer, blank neutral packaging as standard; customized printing of your brand logo and OEM code is available for bulk orders, full matching seal kit packed together with valve body.

1. Lift the whole vehicle, drain all dual clutch transmission fluid, remove gearbox oil pan and disconnect valve body wiring harness connector.
2. Take out original aging valve body assembly, fully clean gearbox internal oil passages to clear carbon sludge and metal debris generated by worn spools.
3. Install our remanufactured valve body, align all oil passage ports evenly, tighten fixing bolts crosswise per OEM torque value.
4. Replace the attached brand-new full sealing gasket kit, refill matched dry dual clutch ATF fluid up to factory standard capacity.
5. Clear TCU fault memory codes via diagnostic scanner, perform low-speed and high-speed road test to confirm stable hydraulic pressure without slipping, shift jerk or abnormal leakage.

Our factory specializes in remanufactured valve bodies, oil pumps, gear sets and complete transmission assemblies for Chinese domestic passenger car brands including Bestune, Hongqi, GAC, MG, Roewe and Geely. We own professional large remanufacturing workshop and dedicated full-transmission hydraulic test benches, implement strict whole-process quality control from component replacement, precision assembly to finished hydraulic bench testing. We supply reliable DCT/AT/CVT hydraulic control valve bodies to auto repair wholesalers all over the world, with stable sufficient stock, factory-direct competitive pricing and exclusive one-on-one professional technical after-sales service.