“Freeze…. Put the impact gun down and move away from the Tranny Jack.”
如果有一个特殊的“回归预防股”,那将不会阻止我们让我们自己的工作更加困难?和许多其他现代单位一起CD4E.是我们面临的挑战的主要例子transmission重建行业。今天的成功传输重建需要仔细和彻底的两步过程。
诊断需要找到原因以及失败。除了修复损坏之外,修复需要纠正初始原因。一旦单位出来并在替补席上,你有一个很好的机会找到失败或损坏的部分,但决定了导致失败的困难更加困难。在您进入之前尽可能多地学习将使您更快地朝着正确的方向前进,并将大大提高最终诊断和修复导致失败的准确性。
许多常见的问题上找到CD4E单位leave an indication of what caused the problem. If you know what to look for and how to spot them, the indicators will guide you to the cause. In order to know where to begin looking when you get inside, learn as much as you can from the outside.
使用所示的规格和信息Figures 1through6, and the diagnostic procedures listed below, many CD4E internal problems can be diagnosed. These diagnostics provide a Complaint, Test Procedure and Indicators to help you spot and identify some common problems. Pressure readings and cooler flow readings, as measured with aSonnaflow.®是您调查的常见起点。还包括其他测试或检查方法。
投诉:
测试程序:
Indicators:
- 低线压力=磨损泵或过滤问题
- 高线压力=佩戴P.R.孔引起高线或故障安全高线切断转换器充电
投诉:
Test Procedures:
- Cooler flow test
- 线压试验 - 检查负载增加的上升
- Measure converter movement when bolting to flex plate
- 测量泵轴
Indicators:
- 低流量=泵或滤波器问题
- 线压应随发动机负荷而变化。没有变化= p.r.阀门问题
- 从完全被推动到弯曲板的转换器运动超过柔性板.100“=转换器成品构建高度太低,转换器或错误的柔性板
- 测量泵轴: 4 cylinder is 14", V6 is 14 11/16"
- 在4缸中的长轴=堵塞的油流量
投诉:
Test Procedures:
- 线压试验 - 检查负载增加的上升
- Inspect servo travel
- Air test at case
- 其他检查
Indicators:
- 线压应随发动机负荷而变化。没有变化= p.r.阀门问题
- 伺服超过.120“max =超越旅行,用选择性销正确
- 如图所示的空气测试用例Figure 6。泄漏=钻孔或硬封
Other Inspections Check For:
- 磨损线压力调制器孔
- EPC螺线管功能和调整
- P.R.钻孔 - 磨损大直径或脏/卡压力泄压阀
- 脏售后市场EPC吹用于标准端插头
没有te:安装Sonnax.73708Reduced Force Servo Spring for units exhibiting low pressure, servo leaks and/or pin wear to restore control of 2-4 band release.
投诉:
Test Procedures:
- Line pressure test
- 高线验证测试
- 空气测试/检查
Indicators:
- 高线压力= Worn PR或EPC螺线管故障保护条件。执行验证测试。良好的管线压力=进行空气测试和检查
验证测试:
- Using an external controller with the ECU isolated to prevent shift/EPC control, check line pressure. High line still present = PR valve worn or stuck
空气测试和检查:
- Remove the valve body and air test feed circuits as shown inFigure 6
- 空气测试并检查鼓用于裂缝
投诉:
Test Procedures:
- 安装换档控制器以控制指令档
- Valve inspections
Indicators:
- Shifts correctly with controller = wiring/connection issues or possibly ECU mismatched to unit
- 使用控制器=可能的阀体故障或阀体不匹配到ECU和单位的阀门身体故障或阀体错误的齿轮
- 检查1-2换档阀孔(内侧端)是否磨损
- Inspect solenoid regulator bore for wear
投诉:
Test Procedures:
Indicators:
- 高线压力=磨损PR阀或EPC螺线管故障保护条件。执行验证测试(见上面的绑定条件)
-
良好的管线压力=检查蓄能器活塞癫痫发作(见零件号
73840-24,-lr,-fwd
投诉:
Test Procedures:
Indicators:
- 低冷却器流量=潜在的润滑油失效和衬套损坏原因
- 旁路冷却器和重新检查。大幅增加表示阻塞冷却器
- 更新P.R.阀门,转换器调节阀和隔板板。安装Sonnax部件号73840-RK和73840-BK按照套件中的指示进行板材修改
- Add a ground strap from transmission case to battery to prevent arcing damage to bushing surfaces
投诉:
Test Procedures:
- CT端口的压力测试(见Figure 2)
- 冷却器流动读数
Indicators:
- 通过所有范围和速度检查CT压力Figure 4
- 正确的CT =如图所示的读数Figure 4
- CT应该在TCC申请急剧上升
- Low CT = (Most common causes): Valve body wear, worn pump or blown gasket, cracked TCC piston or worn bushings. Primary cause of valve body related issues is Bypass Clutch Control Valve wear. SeeFigure 1
- The SonnaFlow® with a Graphing meter can be used to verify TCC command was followed by TCC valve movement. (SeeFigure 5)
- 使用线路压力和sonnaflow®一起验证泵状态
- 高CT =检查P.R.和转换器控制电路。限制的冷却器电路也将提高CT压力
投诉:
Test Procedures:
Indicators:
- 施用后(约15psi。或更多)在换气后慢或快速降压,通常由具有内部泄漏或裂纹活塞的转换器引起的
- 验证TSS传感器风格。后来的设计(白色)传感器,当用作早期设计(黑色)传感器的替代时,通常会在某些条件下导致代码,并且通常可能负责难以重复的代码
除了上述测试之外,这里还有一些额外的方法来定位和确认在拉动装置之前关注的区域:
通过执行换档控制器失速试验,泵,转换器施加电路,转换器摩擦材料,内部密封件,内部密封和TCC电磁阀都可以在车内进行测试。该失速试验不是WOT制动档,发动机稳定在2500rpm。以下“发动机杀死或跌势”测试分离TCC衬里和液压控制。
Shift Controller Stall Test on TCC Circuit (Cool Unit):
- 拆下空气滤清器外壳,线固定器和透射盒连接
- Clearing codes can be avoided by attaching a solenoid block (OEM circuit) onto the chassis harness
- 将换档控制器安装到传输
- 跳线是一种选择。由于没有EPC控制,它们是耗时和改变结果
- Control EPC amperage to simulate OEM idle pressure
- 将控制器移至3档(SS1和SS2 OFF)
- 在D中定位选择器杆,空转750 rpm
- 命令两台第二个TCC应用(过度测试可能导致TCC过载或电磁阀故障)
Indicators:
- Good converter: Engine will stall or near stall immediately on TCC apply (A 4 cylinder should stall, V-6 near stall)
- 弱转换器:rpm下降没有明显的变化。转换器阻尼器汇编经常开始拨浪流
没有te:It is important to verify TCC solenoid and CT pressure are good before condemning the Converter (See Complaint: Code 628, 1741-1744 above).
测试程序:
- 工作温度下换档控制器的道路测试
- 使用轻加速和减速期间的3RD命令TCC
Indicators:
- 良好的转换器:发动机RPM应急剧下降并在海岸下降期间发动机制动。在停止,采用制动器应用,命令第3档。发动机应拉下至少150 rpm或造成困境
- Weak Converter: No drop in engine RPM or engine braking felt
好的,现在拿起空气枪并获得那个单位,但在你破解这种情况之前,这里还有一个值得检查的区域。
转换器台式测试
如果您的诊断导致您怀疑转换器或者您的计划是重新使用“清洁”转换器,这里有一些转换器台式测试,以帮助备份您的决定。常见故障包括TCC活塞密封和涡轮机轮毂磨损,板和阻尼器弯曲和衬里釉和活塞裂缝。如果使用重建转换器,请遵循这些建议,以确保不良涡轮机枢纽没有滑动。
没有restriction to turbine hub oil flow should exist. This flow test can be verified with or without a pre-filled converter (seeFigure 7)。将涡轮轴插入涡轮机毂中并稍微抬起盖子的轴。将atf倒入衬套的轴中。
- Good turbine hubs: The oil will run away as fast as it’s poured in
- Worn turbine hubs: The shaft will fill and oil will not drain past the bushing for 10 seconds or more
- 通过在轮毂面上插入90°密封镐,验证涡轮机槽深度。拾取角度的电线直径必须在.072“至.082之间。良好转换器上的插槽是.078“ - 082”(见Figure 8)。
- 磨损的轮毂插槽:.072“拾取的厚度不会侧进入磨损的插槽
- 良好的枢纽:选择适合
- With the converter lying on the bench and your pick hooked under the turbine hub, lift up on the pick to identify assembled endplay. Endplay should not exceed .050".
These turbine hubs are common to wear, restricting CBY/release, creating engine stumble at idle or TCC codes. Bushing wear and pump surface issue can also affect converter pressure (Figure 9)。
鲍勃沃纳克is vice president of technical development and a member of the TASC Force® (Technical Automotive Specialties Committee), a group of recognized industry technical specialists, transmission rebuilders and Sonnax Industries Inc. technicians.