1992 f350 e4od shift problems
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1992 f350 e4od shift problems
7.3 deisel. In warmer weather after driving a while. Transmission neutrals in and out in od @ 60 mph. At times the rpm indicator does not work on initial start and transmission stays in 3rd gear until the rpm inidicator work again. have change to sensor at the injector pump gear cover. Thinking;
1. filter fluid change, looks good and level ok
2. not sure where the speed sensor is located?
anymore ideas?
1. filter fluid change, looks good and level ok
2. not sure where the speed sensor is located?
anymore ideas?
Last edited by rucountry; Dec 8, 2011 at 05:15 PM. Reason: ignorant sounding
Fleet Owner
Joined: Jul 2006
Posts: 20,382
Likes: 845
From: Mi'kma'ki
that issue there is most commonly associated with the MLPS sensor located on the driver side of the trans.
you should pull the code to verify it (i would) but odds are.
did you know they updated the plug for this sensor.if it hasn't been replaced yet,you need to re-pin it.that's a joyous time.lol.
it's not hard really,just tedious.
of course you should address your failing tach sensor as well you know.in fact id do this first because you know this is failing.then precede to read codes,then precede with the MLPS if need be.likely,but with another issue already,best to start there.
ideally;
remove all connections clean and apply grease.inspect and repair any wires if need be.clear codes.drive until light flashes.read codes,replace sensor(s). best to diagnose it properly.throwing parts at 'er can get expensive.
but the odds are,your pcm isn't getting what it needs from the tach and MLPS sensors.be it the wires/plugs or sensors themselves.
that should get ya going in the right direction for now.just remember,clean things up first.diagnose second.replace parts last.
you should pull the code to verify it (i would) but odds are.
did you know they updated the plug for this sensor.if it hasn't been replaced yet,you need to re-pin it.that's a joyous time.lol.
it's not hard really,just tedious.of course you should address your failing tach sensor as well you know.in fact id do this first because you know this is failing.then precede to read codes,then precede with the MLPS if need be.likely,but with another issue already,best to start there.
ideally;
remove all connections clean and apply grease.inspect and repair any wires if need be.clear codes.drive until light flashes.read codes,replace sensor(s). best to diagnose it properly.throwing parts at 'er can get expensive.
but the odds are,your pcm isn't getting what it needs from the tach and MLPS sensors.be it the wires/plugs or sensors themselves.
that should get ya going in the right direction for now.just remember,clean things up first.diagnose second.replace parts last.
Fleet Mechanic
Joined: Jan 2011
Posts: 1,709
Likes: 4
From: 8600 ft in Colo
Any OBD1 reader should work... Mine does OBD1 and OBD2. Kinda pricey, but I have other vehicles to use it on...
You have changed the tach sensor on the IP gear cover? Does the tach work correctly now? How about the speedo? The VSS (vehicle speed sensor) is on the rear diff.
The E40D trans is controlled by the PCM computer, and needs good signals from the tach sender, VSS, MLPS, FIPL, a barometric pressure sensor, and a couple others I can't think of right now... Is your OD light flashing? The codes may point in the right direction...
You have changed the tach sensor on the IP gear cover? Does the tach work correctly now? How about the speedo? The VSS (vehicle speed sensor) is on the rear diff.
The E40D trans is controlled by the PCM computer, and needs good signals from the tach sender, VSS, MLPS, FIPL, a barometric pressure sensor, and a couple others I can't think of right now... Is your OD light flashing? The codes may point in the right direction...
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
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