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Old 03-17-2005, 00:02   #1 (permalink)
Craig
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Re: Torque Converter clutch won't stay locked up

Good shot at it, dr bob. And I believe it. But she's running strong
with new plugs, wires, etc., and the odd thing is that once it unlocks
on the highway, it will not lock up again all day - on or off the
highway - until it sits at least overnight. Then it's (usually) back to
normal operation as I described earlier. That "normal" is a very firm
shift pattern, and solid lockup at 47 mph.

Now it's unlocking more often at lower, steady, speeds. I'm starting to
suspect temperature sensors. So strange!

I'm almost tempted to put in a switch to activate the selenoid when it
unlocks and sticks me with higher revs on a highway trip. I think that
can be done without overriding the brake cutout, etc. Ultimately, there
are three ways for the selenoid to operate: computer, manual switch,
pressure activated switch (requires some careful drilling and tapping).
Trouble is, if I ever sell it, I have to give a training session:-)

Before I get to far, I'm waiting for warm weather and see how it does.
No fun trying to crawl around at 15 degrees in a blowing snow or wet
garage floor.

Hmmmmmm

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Old 03-17-2005, 00:02   #2 (permalink)
John Riggs
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Re: Torque Converter clutch won't stay locked up

It sounds like you and I are headed in the same direction with this.
Now, if I have to decelerate over a long, distance of a couple thousand
feet, it will darned sure flash my CEL, and similar if I am in downtown,
stop and go traffic.
You may not think this is a related problem, but I'm betting odds that
when you find an answer, then I will have an answer. Temperature was next on
the list of things to check ( did you notice we have no way to check tranny
temp? ). I wonder if there is a way to check this out.


"Craig" <sailinghigh@gmail.com> wrote in message
news:1109985341.966041.188840@o13g2000cwo.googlegroups.com...
| Good shot at it, dr bob. And I believe it. But she's running strong
| with new plugs, wires, etc., and the odd thing is that once it unlocks
| on the highway, it will not lock up again all day - on or off the
| highway - until it sits at least overnight. Then it's (usually) back to
| normal operation as I described earlier. That "normal" is a very firm
| shift pattern, and solid lockup at 47 mph.
|
| Now it's unlocking more often at lower, steady, speeds. I'm starting to
| suspect temperature sensors. So strange!
|
| I'm almost tempted to put in a switch to activate the selenoid when it
| unlocks and sticks me with higher revs on a highway trip. I think that
| can be done without overriding the brake cutout, etc. Ultimately, there
| are three ways for the selenoid to operate: computer, manual switch,
| pressure activated switch (requires some careful drilling and tapping).
| Trouble is, if I ever sell it, I have to give a training session:-)
|
| Before I get to far, I'm waiting for warm weather and see how it does.
| No fun trying to crawl around at 15 degrees in a blowing snow or wet
| garage floor.
|
| Hmmmmmm
|


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Old 03-17-2005, 00:02   #3 (permalink)
Craig
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Re: Torque Converter clutch won't stay locked up

Come to think of it, John. Long ago, and before the tranny rebuild, my
CEL would come on when running at high speed in the mountains or when
towing. On-off-on-off all day and night on a long trip. Get back to
flatlands or unhook the tow, and no more light problems. Same thing
after a long deceleration. Only at higher speeds and/or with a tow.

I'm not sure if this is related to my problem, exactly, but
interesting.

I think that there is some sensing problem - related to temperature
"differentials". I didn't notice the problem before winter (tho it may
not have been there before winter), and how and how long I warm the
vehicle up seems to make a difference when, or if, the lack of lockup,
or unlock occurs.

Then again, it could be a bad electrical connector that is
temperature/moisture critical. When the tranny guys plugged in their
analyzer, they couldn't get the problem to occur. Hmmm. Maybe it's in
that connector (I'll check tomorrow). Or a sticking selenoid that is
sensitive to a cold case and warm fluid, etc. I'm just doing the usual
"looking for an easy way out" before getting too deep into shop
expenses with an old but nice vehicle.

By the way, probably pretty easy to install a temperature sending unit
in the tranny. Lots available on that elsewhere.

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Old 03-17-2005, 00:02   #4 (permalink)
Craig
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Re: Torque Converter clutch won't stay locked up

Just a quick aside, John. I used to know a sailor named John Riggs who
sailed the Great Lakes in Michigan. Not a chance, I bet, but worth
asking.............

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Old 03-17-2005, 00:02   #5 (permalink)
John Riggs
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Re: Torque Converter clutch won't stay locked up

I went to boot there, but I was assigned to the U.S.S. John F. Kennedy
before I transferred to the U.S. Army.


"Craig" <sailinghigh@gmail.com> wrote in message
news:1109988554.875692.48100@l41g2000cwc.googlegroups.com...
| Just a quick aside, John. I used to know a sailor named John Riggs who
| sailed the Great Lakes in Michigan. Not a chance, I bet, but worth
| asking.............
|


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Old 03-17-2005, 00:02   #6 (permalink)
Craig
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Re: Torque Converter clutch won't stay locked up

Oops. Meant recreational sailing and cruising on the Great Lakes around
Michigan. I was US Army 67-70 and wish I had been on the Kennedy. Less
mud:-)

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