Ok, so I just got my '67 stang on the road yesterday after having the car for 6 years! I drove it on one trip for about 6 miles, and it ran great and shifted great. On the second trip, I drove it for about a mile parked it, and let it sit for about an hour and a half. On the trip back, I noticed that it didn't want to really move in Reverse or drive. However, I managaed to make it home. When I went to park it, I was going to back it into the spot. However, reverse wasn't working. When I put it into reverse, it would still move forward. Here's the weird thing: When it's in Park, the parking pin engages, but the car still acts like it's in drive. The car shakes and bogs the engine down. It doesn't rev up to idle-park RPMs

My first thought was "somehow the shifter is out of out of adjustment", even though I just adjusted it. Anyways, I set it per FSM instrustions, and still have the same problem.


Any thoughts? My automatic transmission experience is next to none. If it's trash, I think I'll just ditch it as the car is originally a manual anyway. Seeing as it's stuck in drive, I'd say some valve is stuck or something?

 

I've got the car idling right now so I can check the fluid level. We'll see what happens.

 

Also check the modulator vaccum line and see that is has not become disconnected.

 

Checked the fluid level and it was fine. I'll have to check the vacuum lines in the morning.

 

Not the vacuum lines either.

 

It almost seems like the forward clutch is stuck in position if that helps anyone. 52 views and no other thoughts?

 

http://www.garagejournal.com/forum/s...ad.php?t=55959

I found this on the internet:

Seems like I've found my problem. Has anyone ever encountered this? BTW, I'm "talking to myself" in this thread in hopes that someone else down the road that runs into the same problem might obtain some answers.

 

I had a similar issue but in park my car would go in reverse. in Drive low or 2nd it slipped really badly, reverse worked fine. But my problem was adjustment. You stated that your adjusment is right...

 

It sounds like you revved the engine to get the car to move when it wouldnt move the previous time. Now that clutch pack, probably the forward clutch, is most likely welded two or three frictions and steels together. That happens with dry clutches when it isnt getting enough fluid to apply and lube things.

Here are some diagnostics and schematics for the C4 that I scanned from my trans manual. Find what it is doing and go through the check list of problems that cause that symptom.

http://s189.photobucket.com/albums/z...nsmissions/C4/

Sorry, I wasnt around much yesterday and missed your thread. Sometimes you have to wait a day or two to get an answer, we dont check the forum every 20 minutes or couple of hours. I often check twice daily. When I get up and when I come back in from the shop. Also this isnt the only forum I read, I have 12 others that I go to regularly and a few I check on weekly.

 

toybreaker, yeah like I stated, my first thought was the linkage out of adjustment, but unfortunately that doesn't seem to be the case.

Thumpin, thanks for your help. My "52 views and no thoughts" wasn't supposed to be an impatient statement, but more of a "I must really have a strange/serious problem" kind of thing.

So, my next question is, how could have some of my clutches overheated? The fluid level is fine, and obviously the front pump is functioning as the car moves. Would it be cheaper/more worth while to try a transmission from a u-pull yard? I realize it's a gamble. I did find a C4 in a Gran Torino yesterday. I don't think I can cheaply come up with all of the parts to change over to a manual transmission. T5 prices seem to be artificially high.

Edit: now that i think about if, if the pump was already going, then it might have caused the clutches to overheat, and now they are just "locked" into place.