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Discussion Starter #1
Okay this is my weird problem of the month. Today I drove
the 66 to work. When I got there it was idling kinda rough
so revved it up for about 60 seconds at 3k.Let it go back to
idle it sounded fine so shut it off and went into work.
Tonight get in, start it, sounds good. Put it in gear and
NOTHING. It just sit there. Go through all the gears and
absolutely nothing. No idle change. No clunk. NADA. Okay put
in park and try to push it won't roll. In all other gear
selections it will roll so output is no locked up and the
shift rod is still connected to the trans. Turn it off and
try to start it in different gears and will only start in
Park and Neutral so the safety switch is working. Oh forgot
to say I did check the fluid level first. Okay what do I look for now??? :: :: ::
M
 

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Okay what do I look for now???
... a transmission shop... torque converter?
 

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Wild a$$ guess, that the vacuum hose came loose. That would account for a rough idle (vacuum leak). I believe it would also prevent upshifts to third. Whether it would account for no engagement at all, I don't know.
 

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I agree on checking the vacuum line. It is probably disconnected or the modulator went bad. You might also check the trans linkage. Could be loose and unable to engage trans but nuetral switch would still function.
 

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Discussion Starter #8
I'll pull pan and check filter. I was hoping that a roll
pin or something has dropped out. I've never heard of torque
converter just going bye-bye. This thing would grab 2nd
under hard acceleration. Keep those ideas rolling for me.
Thanks, :: ::
M
 

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I second this. I think a clogged filter would be the cheapest thing to check first. Did you try to add a little more tranny fluid to see what would happen? You did check it while it was in drive, right? I had to ask that since you know what they say when a person assume...

Dean T
 

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Discussion Starter #10
Didn't add more fluid, but I know it was in Drive. In fact
tried all gears and the linkage is still conected from the
Neutral safety switch response. I'm mean this thing makes
no sounds in gear. :: ::
M
 

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I agree with the others, no noises during shifting sounds like no fluid pressure due to clogged filter, no fluid, or pump is hosed for some reason.
Post what you find.
 

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I have witnessed a torque converter go south before. It made a pretty loud noise when it puked. You could still move the car (truck in this case) if you revved it way up, but it would only creep. Made nasty rattling/grinding noises constantly by that point. The ?turbine? inside the converter is what let go. Also, this happened during slow, gentle driving (taking the trash to the end of the driveway).

Doesn't sound like your problem, I aree with changing your oil and filter first.
 

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"Okay what do I look for now???"

A manual transmission. :)

Sorry I couldn't resist.

John Harvey
 

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Discussion Starter #15
Not a drop. No drips, no leaks, no fouls. The slipping may
have occurred on my drive in. Something just wasn't right,
but couldn't put my finger on the problem, nothing really
obvious. ::
M
 

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I had this happen to one of my Mustangs last year. A local shop determined that my transmission pump quit (burned out). I got a second opinion which confirmed the diagnosis. I ended up just swapping out the entire transmission with another C4 that I got from a salvage yard.
 

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Pump!
 

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When this happened to mine, it was also the pump.

It had been acting a bit wierd for a few weeks prior to that, a few slips here and there. But a nasty whine that I could hear through the transmission tunnel.

Another thing you can try is tightening up the bands, but I doubt it will help.

If the bands roasted, for whatever reason, your fluid would most likely be burnt.
 
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