97 Dodge 1500 Tranny Problem

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tstean@harenlaughlin.com - 19 Feb 2008 04:24 GMT

I have a 1997 1/2 ton excab 4x4 5.9 automatic and on the drive home
the engine light came on and the overdrive light came on also . I have
changed the speed sensor and the filter/fluid and no changes. I
disconected the battery to reset the codes but nothing changed .
Tranny will not let me take off in Drive it just slips I have to start
in low and manually shift it to drive.

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Tom Lawrence - 19 Feb 2008 07:18 GMT

>I have a 1997 1/2 ton excab 4x4 5.9 automatic and on the drive home
> the engine light came on and the overdrive light came on also . I have
> changed the speed sensor and the filter/fluid and no changes. I
> disconected the battery to reset the codes but nothing changed .
> Tranny will not let me take off in Drive it just slips I have to start
> in low and manually shift it to drive.

You need to get an OBD-II code reader, and retrieve those codes. They'll
tell you what's wrong. It sounds like your transmission has gone into limp
mode, and without any other info., I'd guess your governor pressure sensor
has crapped out.

If you're not comfortable with doing some pressure tests, dropping the pan,
and changing some parts on the valve body, then take it to a transmission
shop - it's not that expensive of a fix.

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John Kunkel - 19 Feb 2008 19:44 GMT

The last sentence points to a failed overrunning clutch (sprag), placing the
shifter in 1 applies the rear band which performs the same function as the
sprag.

Is there a "tinny" sound when attempting to take off in Drive? Was there any
hard debris found when the pan was removed.

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