在济南的汽修圈里，自动变速箱维修是门“技术活”，更是门“良心活”。最怕的不是修不好，而是花了原厂件的钱，却装了个“翻新货”。如何练就“火眼金睛”，在维修时揪出“李鬼”变速箱？这篇攻略带你拆解“验身”全流程。

　　In the auto repair circle of Jinan, automatic transmission maintenance is not only a "technical activity", but also a "conscientious activity". The biggest fear is not that it cannot be repaired, but that the money for the original parts is spent on installing a "refurbished product". How to develop a sharp eye and catch the "Li Gui" gearbox during maintenance? This guide will take you through the entire process of "body examination".

　　一、外观细节：原厂件的“身份证”

　　1、 Appearance details: "ID card" of the original factory parts

　　铭牌与标签：

　　Nameplates and labels:

　　原厂变速箱外壳必有金属铭牌，刻有零件编号、生产日期、厂商代码（如ZF、Aisin的专属标识）。

　　The original gearbox casing must have a metal nameplate engraved with the part number, production date, and manufacturer code (such as ZF and Aisin's exclusive identification).

　　副厂件铭牌多为贴纸，用酒精擦拭易脱落；原厂铭牌用化学腐蚀工艺，刀片刮擦无痕迹。

　　The nameplates of auxiliary components are mostly stickers, which are easy to peel off when wiped with alcohol; The original factory nameplate uses chemical corrosion process, and the blade scratches without any traces.

　　焊接与接缝：

　　Welding and seams:

　　原厂件采用激光焊接，接缝均匀无毛刺；副厂件多为手工电焊，焊点粗糙如“蚯蚓”。

　　The original parts are laser welded, with uniform and burr free seams; The secondary components are mostly manually welded, with rough welding points resembling "earthworms".

　　重点检查变速箱与发动机连接处、油底壳接缝，这些位置最易“露馅”。

　　Focus on inspecting the connection between the gearbox and engine, as well as the seam of the oil pan, as these areas are most prone to "exposure".

　　油漆与防腐层：

　　Paint and anti-corrosion coating:

　　原厂件使用电泳涂层，颜色均匀反光弱；副厂件喷漆粗糙，阳光下可见“橘皮纹”。

　　The original parts use electrophoretic coating, with uniform color and weak reflection; The spray paint on the accessory parts is rough, and orange peel patterns can be seen in the sunlight.

　　用硬币轻刮底漆，原厂件露出的是灰色电泳层，副厂件可能直接见金属本色。

　　Lightly scrape the primer with a coin, and the original parts will reveal a gray electrophoretic layer, while the secondary parts may directly show the metallic color.

　　二、内部构造：拆解后的“照妖镜”

　　2、 Internal Structure: Disassembled "Magic Mirror"

　　阀体与电磁阀：

　　Valve body and solenoid valve:

　　原厂阀体表面有激光打标的零件号，电磁阀插头有防错插设计。

　　The original valve body has laser marked part numbers on its surface, and the solenoid valve plug is designed to prevent accidental insertion.

　　副厂阀体零件号多为蚀刻，字体模糊；电磁阀插头无防错结构，易插反导致烧毁。

　　The part numbers of the auxiliary valve body are mostly etched and the font is blurry; The solenoid valve plug has no anti mistake structure, which makes it easy to reverse and burn out.

　　离合器片与钢片：

　　Clutch plates and steel plates:

　　原厂离合器片摩擦材料厚度均匀（误差≤0.05mm），钢片有淬火痕迹。

　　The friction material thickness of the original clutch plate is uniform (error ≤ 0.05mm), and the steel plate has quenching marks.

　　副厂件摩擦片厚度不一，钢片无淬火层，用磁铁吸附可区分（原厂钢片磁性弱）。

　　The thickness of the auxiliary friction plate varies, and the steel plate does not have a quenching layer, which can be distinguished by magnetic adsorption (the original steel plate has weak magnetic properties).

　　齿轮与轴承：

　　Gears and bearings:

　　原厂齿轮表面有滚齿纹，轴承滚珠呈“麻点”状（渗碳处理痕迹）。

　　The surface of the original gear has rolling teeth, and the bearing ball is in the shape of "pockmarks" (traces of carburizing treatment).

　　副厂齿轮表面光滑如镜，轴承滚珠呈“镜面”状，耐磨性差30%以上。

　　The surface of the secondary factory gear is as smooth as a mirror, and the bearing ball is in a "mirror" shape, with a wear resistance difference of more than 30%.

　　三、动态测试：上路实测“现原形”

　　3、 Dynamic testing: road test shows' prototype '

　　冷车状态：

　　Cold car status:

　　启动后原地挂挡，原厂变速箱换挡平顺无冲击；副厂件可能因油压不稳出现“闯挡”。

　　After starting, shift gears in place and the original gearbox shifts smoothly without impact; Auxiliary components may experience "gear shifting" due to unstable oil pressure.

　　测试D挡与R挡切换时间，原厂件响应≤0.5秒，副厂件可能延迟1秒以上。

　　Test the switching time between D and R gears, the response of the original parts is ≤ 0.5 seconds, and the auxiliary parts may be delayed by more than 1 second.

　　热车状态：

　　Hot car status:

　　连续急加速3次，原厂变速箱油温稳定在90-100℃；副厂件可能因散热差飙至120℃以上。

　　Continuously accelerate rapidly for 3 times, and the original gearbox oil temperature remains stable at 90-100 ℃; The secondary components may soar above 120 ℃ due to poor heat dissipation.

　　高速行驶时观察转速波动，原厂件转速稳定如“心电图”，副厂件可能出现“过山车”式波动。

　　Observing speed fluctuations while driving at high speeds, the original parts' speed remains stable like an electrocardiogram, while the auxiliary parts may experience roller coaster like fluctuations.

　　故障码验证：

　　Fault code verification:

　　连接诊断仪读取变速箱数据流，重点监控“离合器打滑量”“电磁阀电流”等参数。

　　Connect the diagnostic instrument to read the transmission data stream, focusing on monitoring parameters such as "clutch slip" and "solenoid valve current".

　　原厂件数据波动≤5%，副厂件可能因匹配问题导致数据异常。

　　The fluctuation of original parts data is ≤ 5%, and the data of secondary parts may be abnormal due to matching problems.

　　四、维修记录：追溯历史的“密码本”

　　4、 Maintenance Record: A "Password Book" for Tracing History

　　变速箱编号查询：

　　Transmission number query:

　　通过厂商官网或4S店系统，输入变速箱外壳编号，可查询生产批次、销售去向。

　　By entering the gearbox housing number through the manufacturer's official website or 4S store system, the production batch and sales destination can be queried.

　　若编号显示销往东北地区，却出现在济南的维修厂，需警惕“串货”或“翻新”。

　　If the number shows that it is sold to the Northeast region but appears in a repair shop in Jinan, be alert to "cross selling" or "refurbishment".

　　维修历史追踪：

　　Repair history tracking:

　　要求维修厂提供变速箱拆解前的故障代码、油液检测报告等历史数据。

　　Request the repair shop to provide historical data such as fault codes and oil testing reports before disassembling the gearbox.

　　若维修记录显示“多次大修”，但变速箱外壳无维修痕迹，可能为“拼装件”。

　　If the maintenance record shows "multiple major repairs" but there are no repair marks on the gearbox casing, it may be an "assembled part".

　　五、避坑实操：这些钱别乱花

　　5、 Avoiding pitfalls: Don't spend this money recklessly

　　“低价翻新”陷阱：

　　The 'Low Price Renovation' Trap:

　　价格低于市场价30%的“原厂件”，多为报废变速箱拆解件，寿命不足原厂件50%。

　　The "original parts" with a price 30% lower than the market price are mostly scrapped gearbox disassembly parts with a lifespan less than 50% of the original parts.

　　“高仿”识别技巧：

　　High imitation recognition skills:

　　重点检查“隐蔽部位”，如变速箱底部油底壳螺丝、线束插头等，高仿件常在这些位置“偷工”。

　　Focus on inspecting "hidden parts" such as screws on the oil pan at the bottom of the gearbox, wire harness plugs, etc. High imitation parts often "steal work" in these positions.

　　合同条款要“卡死”：

　　The contract terms must be 'stuck':

　　要求合同注明“提供原厂全新变速箱，假一赔三”，并保留变速箱外壳、铭牌等关键部件作为证据。

　　Require the contract to specify 'provide original brand new gearbox, one false one compensate three', and retain key components such as gearbox casing and nameplate as evidence.

　　结语：验明正身，拒绝“拆盲盒”

　　Conclusion: Verify the identity and refuse to "open the blind box"

　　在济南修自动变速箱，就像“鉴宝”——外观可仿，内核难造。记住：没有“物美价廉”的原厂件，只有“偷梁换柱”的副厂货。下次再面对维修报价时，不妨掏出这篇攻略，用专业手段给变速箱来个“全身CT”。毕竟，省下的每一分维修费，都是你爱车的“寿命保证金”！

　　Repairing an automatic transmission in Jinan is like a "treasure trove" - the appearance can be imitated, but the core is difficult to manufacture. Remember: there are no "good value for money" original parts, only "substandard" secondary products. Next time you face a repair quote, why not take out this guide and use professional methods to give the gearbox a "full body CT". After all, every penny saved on maintenance costs is a "life guarantee" for your car!

　　本文由济南自动变速箱维修友情奉献.更多有关的知识请点击:http://www.jnbsx.com真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from Jinan Automatic Transmission Maintenance For more information, please click: http://www.jnbsx.com Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.