dead tach sender on my 93 F-350 7.3

[gotmustang]

i have a dead tach sender that send the automatic trans into a "failure management mode" (limp mode) with harsh engagements and firm shift feel and an abnormal shift schedule. i cant get one now being sat found one for monday.is there a way to do something with the two wires so i can use the truck? Thanks

[cdnsarguy]

A dead tach sender should/would send the automatic (E4OD) trans into a "failure management mode" (limp mode) with harsh engagements and firm shift feel and an abnormal shift schedule. It has no effect on a manual trans only the Tach readings.

Check the wires where they exit the big nut on the oil filler housing , known to short out due to bare wire.....

Replace the tach sender on the oil fill housing a big 1" nut with 2 wires. Ford only part Engine RPM sensor E5TZ-17B384-A about $50. You can remove and clean it but usually changed later too.

You can test it too, hold it in the air away from ferrous metal, using an ohm meter lead on each wire you need DC resistance between 2000-3000 ohms.

No temporary fixes till the new part is installed...... if that is the cause.

[gotmustang]

Thanks