Used Dual Clutch Transmission Guide Gear Set Kit 1701406AA6K for Bestune T77 1

This used transmission guide gear set kit matches Transmesun 7DCT220 dual clutch gearbox, exclusive OEM part number 1701406AA6K, specially applicable to 2019 Bestune T77 1.2T models.

The guide gear assembly is a core mechanical shifting component of the 7DCT220 dual clutch transmission. Worn gear teeth, damaged splines and deformed bearings will lead to abnormal shifting noise, gear jumping, difficulty engaging gears and transmission failure. Our used gear sets are dismantled from low-mileage intact original vehicles; each gear component is screened strictly, worn or cracked gears are eliminated directly. All reserved gears pass precision runout detection and noise testing before delivery, with complete matching dimensions for direct replacement without extra modification.

Warm Reminder: This guide gear kit only fits Bestune T77 1.2T equipped with original 7DCT220 dual clutch gearbox, cannot interchange with other displacement or other series dual clutch gearbox gears. Send your complete 17-digit VIN code for free pre-order matching verification to avoid mismatching and costly cross-border return shipping fees.

1. Low-mileage Vehicle Dismantling Source: All gear sets are dismantled from accident-free vehicles with low mileage; gear sets from flooded, over-revved or severely damaged gearboxes are rejected at source.
2. Full Visual & Precision Inspection: Each gear is checked for tooth crack, spline wear, pitting and deformation via magnifying glass and micrometer; defective gears are scrapped directly.
3. Noise & Runout Dynamic Testing: Assemble the gear set on dedicated 7DCT220 test bench to simulate real shifting operation, screen out gears with abnormal rattling or excessive runout.
4. Deep Degreasing & Anti-rust Treatment: High-pressure oil passage cleaning to remove old transmission oil sludge; uniform anti-rust oil spraying to resist salt fog during long sea transportation.
5. Shockproof Independent Wooden Box Packing: Separate foam partition for each gear to prevent collision scratches, support blank neutral packaging or customized printed OEM labels for bulk orders.

All gears retain original factory machining standards, tooth modulus and spline size fully consistent with factory parts, perfectly compatible with all 2019 Bestune T77 1.2T 7DCT220 gearboxes, no adjustment needed during installation.

We reject high-mileage, cracked, pitted gears; every finished gear set undergoes bench noise test to effectively solve abnormal gear noise and jumping faults for your repair shops.

Every gear set has inspection records including wear data and test video; we can provide testing footage for bulk buyers to show product quality to local car owners.

1 set sample order is acceptable, tiered discount for bulk orders to lower your stocking cost. Standard neutral blank wooden boxes without factory logos; customized printed OEM number and brand labels available for large orders.

We have dedicated technicians specializing in 7DCT220 dual clutch transmission parts, providing one-on-one remote video guidance for gear assembly and troubleshooting shifting noise failures for your downstream repair garages.

1. Remove the whole 7DCT220 gearbox from vehicle, fully drain old dual clutch transmission fluid and disassemble the gearbox housing.
2. Take out the original worn guide gear set, clean the gearbox internal oil passages to clear metal debris generated by worn gears.
3. Install our tested used guide gear set in sequence, align gear splines and bearing positions, tighten all fixing shafts according to factory torque specifications.
4. Replace new transmission filter and full sealing gasket kit, fill up matched dual clutch ATF fluid as factory standard capacity.
5. Clear transmission fault codes via diagnostic scanner, conduct road test to check abnormal noise, gear jumping and shifting smoothness.

Our factory specializes in dismantled used transmission spare parts, remanufactured valve bodies, oil pumps and complete gearbox assemblies for Chinese domestic passenger vehicles including Bestune, GAC, MG, Roewe and Geely. We own professional dismantling workshops and dedicated gear dynamic testing benches, implementing strict multi-layer screening procedures for all used transmission gears to eliminate hidden quality hazards. We supply stable tested transmission spare parts to auto repair wholesalers all over the world, with sufficient ready stock, factory-direct competitive pricing and exclusive one-on-one professional technical after-sales service.