Brand New U440 Automatic Transmission Assembly OE S04035 Direct Replacement

1.Product Overview

U440 is a 4‑speed front‑wheel‑drive automatic transmission, this product is brand‑new complete gearbox assembly with OE part number S04035, designed for Changan 1.5L and 1.6L displacement FWD passenger vehicles. This complete unit integrates housing, internal planetary gear assembly, clutch components, hydraulic valve body, solenoid valve group, torque converter and matched electrical connectors. No internal overhaul work has been done, all internal components are original new factory parts. Every finished unit completes professional bench dyno test before shipment. This product is ideal replacement solution for vehicles with original gearbox internal damage, suitable for small auto‑parts distributors, independent repair shops and cross‑border aftermarket business.

2.Fitment & Parameter Table

Note: OE number S04035 is the core matching reference. Different configurations of same car model may install different gearbox, please verify VIN and original part number before purchase.

3.Inspection & Testing Standard

Every brand‑new U440 transmission implements multi‑dimensional inspection procedure. Raw component inspection checks housing casting quality, solenoid valve performance and internal gear parts. After assembly, visual inspection detects housing scratch, crack, thread hole and sealing surface condition. Then dyno bench test simulates real vehicle working condition: test every forward gear and reverse gear shifting performance, monitor hydraulic oil pressure fluctuation, torque‑converter lock‑up function, check all sealing positions for oil leakage. Electrical circuit test is carried out for all connectors. Units failing any test item will be rejected and cannot be delivered to clients. Each finished product keeps corresponding test record.

4.Core Competitive Advantages

1. Genuine brand‑new complete assembly, no second‑hand core parts, effectively avoid early‑stage failure risk caused by old internal components.
2. Delivered as full‑set assembly including torque converter, clients do not need to source extra matching accessories separately.
3. 100% dyno‑bench tested before shipment, shifting performance and oil pressure are verified in factory.
4. Strictly follow OE S04035 specification, high compatibility for matching Changan 1.5L /1.6L FWD vehicle.
5. Support small‑batch wholesale order, suitable for small‑scale distributors and independent repair shops, flexible order solution.

5.Professional Installation Guidance

1. Confirm VIN information, original gearbox OE number S04035, engine displacement and front‑wheel‑drive configuration before installation.
2. Must thoroughly flush transmission oil cooler and oil pipeline to eliminate metal debris from the old broken gearbox. Dirty oil circuit will damage brand‑new transmission quickly.
3. Install brand‑new transmission oil filter, fill with manufacturer‑approved ATF fluid with correct volume.
4. Firmly fasten mounting bolts, oil pipes and all electrical connectors, avoid loose connection.
5. After mechanical installation finished, run transmission adaptive learning by professional diagnostic tool, perform static gear test and subsequent road test.
6. Highly recommend professional transmission‑specialized technician to complete installation work. Improper installation will cause gearbox malfunction.

6.Packaging & Transportation

The U440 transmission will be wrapped with anti‑rust plastic film, use shock‑absorbing foam to protect housing and protruding connectors. Then fixed inside IPPC fumigated solid wooden crate, inner steel belts prevent collision and displacement during long‑distance ocean transportation. Outer crate marks product model, OE number, weight and dimension for customs inspection. We support multiple international trade terms. Small batch goods can adopt LCL consolidation shipment. We can provide commercial invoice, packing list required for import customs clearance.

7.Factory Strength Introduction

Our factory focuses on automatic transmission assembly, testing and export service for global aftermarket. We own independent assembly workshop and multiple professional transmission dyno‑bench test equipment. Our product portfolio covers brand‑new, remanufactured and used transmission assemblies. We serve large numbers of small‑and‑medium auto‑parts distributors and local repair workshops all over the world. Complete internal quality‑control system covers raw‑material check, assembly process control and finished‑product testing. We support trial order and small‑batch wholesale business, provide complete export document service for overseas customers.

8.FAQ

Q1: Is torque converter pre‑matched with this U440 transmission?

A: Yes. Each brand‑new U440 complete assembly is equipped with matched original torque converter. We complete running‑in and matching test inside factory. You can directly install the whole set on vehicle. Please double‑check your original gearbox OE number S04035 for compatibility confirmation.

Q2: What is the lead‑time after I place the order for U440 gearbox?

A: If goods are in stock, we can arrange shipment within 7‑10 working days after receiving deposit. For bulk order, production lead‑time depends on order quantity. We will inform you exact delivery schedule before order confirmation.

Q3: Why is oil‑cooler flushing mandatory for new gearbox installation?

A: The previous failed old gearbox will generate metal debris inside oil cooler and pipeline. If these metal particles remain inside oil circuit, they will flow into brand‑new U440 transmission and scratch internal valve body, gears and clutch components, which will cause early failure. So thorough flushing is indispensable installation procedure.