94 Towncar shift problem

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Me - 28 Jan 2009 12:54 GMT

My 94 Town Car will shift in and out of overdrive for no reason. It seems to
be worse after several miles and is not speed related. If I shut the OD off
everything is normal.

Suggestions please.
Ed

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Puddin' Man - 28 Jan 2009 17:51 GMT

>My 94 Town Car will shift in and out of overdrive for no reason. It seems to
>be worse after several miles and is not speed related. If I shut the OD off
>everything is normal.
>
>Suggestions please.

Erratic shifting on such a beast is usually due to defective MLPS
(Manual Lever Position Sensor). Maybe $400 (too much) to replace at a
dealer. Not tremendously difficult as a DIY.

See:

http://www.markviii.org/htdocs/dc/dcboard.php?az=show_topic&forum=21&topic_id=51
973&mesg_id=51973&page=

Puddin'

"Take Yo' Hand Out My Pocket (I Ain't Got Nothing What Belongs To You)!"
- Rice Miller, who probably never even _heard_ of GW Bush, Paulson, etc

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Ed - 28 Jan 2009 20:54 GMT

What controls the overdrive. Is there a vacuum sensor that could be bad?
It would seem to me the MLPS is working if I have no other problems getting
in the gear. If I am wrong tell me. I dont want to invest in a new switch if
that is not likely to solve the problem. The overdrive seems to be higher
speed than I remember. Maybe 40 mph.

Thanks for the suggestions.
Ed

> My 94 Town Car will shift in and out of overdrive for no reason. It seems
> to be worse after several miles and is not speed related. If I shut the OD
> off everything is normal.
>
> Suggestions please.
> Ed

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Puddin' Man - 28 Jan 2009 21:49 GMT

>What controls the overdrive.

The tranny and the "Compluter".

>Is there a vacuum sensor that could be bad?

Not to my knowledge, but I'm not a hard-core tranny guy.

>It would seem to me the MLPS is working if I have no other problems getting
>in the gear.
>If I am wrong tell me.

Can't tell from here.

>I dont want to invest in a new switch if
>that is not likely to solve the problem. The overdrive seems to be higher
>speed than I remember. Maybe 40 mph.

40 sounds "in the ballpark" to me.

>Thanks for the suggestions.

Additional opinions are likely a good idea.

Please to relate info i.e. mileage, tranny maintenance (fluid changes), usage (city,
hiway), any other problems, etc etc.

P

>> My 94 Town Car will shift in and out of overdrive for no reason. It seems
>> to be worse after several miles and is not speed related. If I shut the OD
>> off everything is normal.
>>
>> Suggestions please.
>> Ed

"Take Yo' Hand Out My Pocket (I Ain't Got Nothing What Belongs To You)!"
- Rice Miller, who probably never even _heard_ of GW Bush, Paulson, etc

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