Transmission
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Joined: Nov 2020
Posts: 9
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From: Nc
Transmission
Hey guys I had my transmission rebuilt about 2 months ago. And since then I've taken it back twice now fixen to be 3 times, the problem is when I would get to 50-60 mph my rpms shoot to 3k, the first time they replaced a sensor, got it back a few days later did the same thing this time they replaced the sensor again and a switch, thought that fixed it then this morning it started again, but this time it also started doing it at 30-35 mph any idea what could cause this?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,734
Likes: 2,661
From: SE Florida
E4ODs of that era had a problem with the Manual Lever Position Sensor (MLPS - also called the TRS - Transmission Range Sensor.) it is the part on the driver's side of the trans with the wiring harness plugged into it. It can fail in a mode that the PCM cannot detect so there is no code set. When this happens you get random neutrals. Replace the MLPS.
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