7DCT220 Complete Dual Clutch Transmission Assembly OE 1700010VD04 for Bestune T77 1.2L 7 Speed Dry DCT Gearbox Assembly

This complete 7DCT220 dry dual clutch transmission assembly matches Bestune T77 equipped with 1.2L turbo engine.

Reference OEM number: 1700010VD04, GA4GA12TD.

7DCT220 is a widely used 7-speed dry DCT for Chinese domestic SUV models. Common serious failures include clutch burning, internal abnormal noise, slipping, gear missing and housing damage which cannot be repaired by simply replacing individual mechatronic valve body.

Our used gearbox is fully disassembled inspected, damaged internal components replaced and bench running tested. Ready-to-install whole transmission for auto repair workshops.

1. Overall Appearance Check: Inspect housing for cracks, collision deformation and oil leakage traces.
2. Full Disassembly Inspection: Check gears, synchronizers, shafts, bearings and dual clutch assembly for wear, ablation and damage.
3. Worn Parts Replacement: Replace defective bearings, seals and damaged friction components with qualified spare parts.
4. Clearance Calibration: Adjust clutch clearance, gear meshing clearance according to factory standard parameters.
5. Continuous Bench Running Test: Simulate forward/reverse shifting and load operation to check abnormal noise, shudder and oil leakage.
6. Anti-rust Treatment & Export Packing: Anti-rust protection + customized EPE foam + heavy export carton or plywood case to avoid damage during long-distance transportation.

• Complete Whole Transmission Assembly

  Integrated finished gearbox including housing, dual clutch, gear sets, input/output shafts. No need to source scattered separate components.

• Strict Bench Running Test

  Every finished 7DCT220 gearbox undergoes continuous cycle test. Abnormal noise, oil leakage and shifting defects are eliminated before delivery, reducing after-sales risks.

• 1:1 OEM Mounting Dimension

  Installation holes, wiring interfaces and connection dimensions are consistent with original gearbox. No modification required during vehicle replacement to shorten overhaul time.

• Flexible Wholesale Support

  1 unit minimum trial order. Tiered discount for bulk purchases. Neutral blank packing and custom label printing available. Warranty terms negotiable for long-term overseas distributors.

1. Lift vehicle, drain original DCT transmission fluid, disconnect drive shafts and wiring harness.
2. Remove transmission fixing bolts, separate the gearbox assembly from engine and take it out.
3. Clean engine flywheel mounting surface, inspect flywheel flatness and release bearing condition.
4. Install 7DCT220 transmission, tighten bolts following factory torque specification, reconnect all pipelines and wiring plugs.
5. Fill with dedicated DCT transmission fluid, clear ECU fault codes, complete adaptive learning and road test for smooth shifting.

Our factory specializes in complete transmission assemblies, valve bodies, clutches and overhaul spare parts for Chinese domestic passenger vehicles including Bestune, Hongqi, Great Wall, Geely, BYD, Chery.

We have professional transmission testing equipment and experienced technical team. We supply Chinese auto spare parts to overseas wholesalers, repair chains and auto warehouses in Southeast Asia, Middle East, Eastern Europe. Stable stock, factory direct price and dedicated English technical support.

Q1: All 7DCT220 gearboxes are second-hand dismantled units. What standards do you use to screen housings? How do you prevent defective products with hidden cracks or sand holes from being delivered?

A1: We conduct penetration crack inspection and leak testing for every recycled housing. Housings with deformation, sand holes or invisible cracks will be eliminated directly without entering assembly procedures. During disassembly, we carefully check every surface for potential damage. Strict screening helps avoid oil leakage and structural failure after installation, effectively reducing after-sales risks for overseas distributors.

Q2: Can you shoot bench running test videos and complete packing videos for the 7DCT220 gearbox and send them to customers for confirmation before shipment?

A2: Yes. Upon your request, we can record real bench running footage showing shifting operation, noise and leak inspection, as well as full packing videos before delivery. You can check product appearance and overall packaging condition in advance. Please notify our workshop ahead of time so we can complete recording and send videos for your confirmation before arranging shipment.

Q3: After installing the 7DCT220 gearbox, does the TCU require adaptive learning? What solutions are available if repair shops lack dedicated diagnostic equipment for Chinese vehicles?

A3: TCU adaptive learning must be carried out after installation to achieve smooth gear shifting. If repair shops do not have special diagnostic tools, they can complete self-learning by standardized road test steps following our operation guide. You can contact our English technical team to obtain detailed procedures to avoid faults such as shudder and delayed gear engagement.