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Gearstar 4l80e

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6. At 28.5 inches long, the 4L80E is almost identical in length to the TH400 (28 inches). The 4L80E is actually about 35 pounds heavier than the TH400, but that’s an acceptable gain considering the 0.75 overdrive gear we’re getting. The 4L80E’s First 2.48:1, Second 1.48:1, Third 1.00:1, and final overdrive gear of 0.75:1 allows for low-end grunt but also low rpm cruising.