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  1. C

    P0721 OSS Noise

    5R55E. Fluid is cherry red, clean. No burning. Honestly drives and shifts great except for occasional uncommanded downshifts. Popped a P0721 code. Replaced OSS with a Motorcraft part. Problem persists. Datalogged with Forscan. Signal is all over the place, even while stopped. Very noisy...
  2. E

    Auto>Manual Swap. OSS 24-hole>VSS 12-hole. Speed Limit Issue

    I have performed a swap from a 5R55W Auto Transmission (Stock 2006 Ford Explorer Auto) to a M05D-R1HD Manual (From Ford Ranger). The new manual transmission has a VSS in the tail housing has 12-holes. The stock OSS from my auto had 24-holes. I've adjusted the "number of holes in OSS" in my SCT...
  3. A

    OD Off not working properly

    I have a 98 Explorer 2dr Sport 2wd 6 cyl pushrod, 5speed AT. It wanders into 5th gear (I assume OD) at will when OD is Off. No CEL and no flashing OD Light. I read that the OSS sensor could be a problem or maybe a worn gear inside the tranny could be the problem, except that it should throwing a...
  4. S

    Relationship between engine rpm, ISS and OSS readings

    I was looking at the data from the PCM for engine rpm, ISS and OSS and wondered if there was a formula to check that the correlation between the three was correct in different gears and different engine rpm. In 3rd gear (2 position on selector) ISS and OSS readings seem similar. When in D...
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