Rebuilding the Chrysler 68RFE Torque Converter

还应该注意的是，这是一个“俘虏离合器”设计，类似于更新的ZF扭矩转换器。乐动BBIN彩票然而，除了用弯曲凸片固定的离合器或焊接地，离合器组件被螺栓固定在前盖上。转换器构建器会惊讶地发现它们将挖掘正确的尺寸六角驱动器，以拆卸这些离合器部件。

The impeller hub has also been changed and converter rebuilders will need to pay careful attention to these changes.图2.显示明显的差异。一个像上面的O形圈槽45RFE.converters, has been added to the hub. The 2 slots on the hub that drive the inner pump gear have been removed and have been replaced by 4 flats. The biggest change to the hub, however, is not a visible change. The material that is used to make the hub is now AISI grade 4140 chrome-molybdenum (4140 chrome-moly). Lesser grades of chrome-moly steel have used for OEM impeller hubs in the past, including 4130; however, this is believed to be the first time 4140 chrome-moly has been used for an OEM hub.

Since the 4140 chrome-moly hub is an exotic metal for most transmission shops, there may be some fear of the unknown. In addition, there is the concern that the 4140 hub is being welded to a mild steel (1018) impeller. Welding 4140 in the normalized condition to mild steel will be comparable to welding mild steel to mild steel. It is recommended that the welder consult with his filler material manufacturer for the proper wire and parameters to start with. The main issue with 4140 steel is that it can easily be heat treated and welding can result in heat treatment in localized areas around the weld. This condition can be problematic if the welder is not prepared for it in advance. Verifying the weld parameters is always advisable when starting a new process. If the welding process and material are not understood, getting some assistance from a qualified welding engineer will help ensure the development of sound procedures. Using a pulsing inverter welder will also help in achieving a weld that will have improved deposition rates for higher travel speed or more output per hour. Pulsing programs also have higher peaks for weld penetration while maintaining an average that is similar to conventional gas metal arc welding. Pairing with the right wire and gas will make the process even more manageable. The key for a good weld is controlling the process variables and optimizing the process potential for cycle times, energy input for cooling rates and weld quality.