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The same TCI® Transmission Control Unit works with GM 4L60E, GM 4L65E, GM 4L70E, GM 4L80E, GM 4L85E, GM 4T65E, GM 4T80E, Ford AODE, Ford 4R70W, Ford E4OD, Ford 4R100, Ford 5R55E, Chrysler 45RFE and Chrysler 545RFE transmissions – simply select the proper transmission-specific wiring harness. Nov 29, 2015 · Common 4T65E-HD Problems. Because GM relies on electronic devices, unexpected failures can happen due to surges in electric current. The solenoid packs as well as the pressure control solenoid are known issues with some heavy-duty gearboxes. Lack of fourth gear is another issue as well as missing the reverse gear.