4-Speed Shift Sequence
4-Speed Shift Sequence. Simpson 3-Speed + Overdrive. 3-Speed + Overdrive Transmissions. Transmissions that use a Simpson 3-speed + overdrive geartrain include: DaimlerChrysler (Asin Warner): AW-4, 40RH, 42RH, 46 RH, & 47RH Ford: 4R44E, 5R55E, & E4OD General Motors: 4L80E & THM 2004R
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