C4 won't shift into reverse or park suddenly - Page 2 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #16 of 47 (permalink) Old 05-14-2015, 10:49 AM Thread Starter
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Re: C4 won't shift into reverse or park suddenly

Quote:
Originally Posted by PSIG View Post
From your first description, it sounds like R-N-D-2, but it doesn't matter really. The point is that you now know the primary problem is in the transmission. The issue is either in the shift spool or the parking pawl linkage. If you are the type that can do an oil change, it is not a big deal to drop the pan and take a look, and is the same procedure as a fluid and filter change. While you are in there, take a look at the linkage going into the transmission and just inside, for how and why it is binding. When you drop the pan, you can see about half of the internal linkage, and it may have simply popped a clip off the linkage, where the fix is 15 and 2 minutes to replace it. If the linkage is binding at the rear, you would have to remove the extension housing, taking about another 30 minutes and a gasket to do.

You may want to consider doing the fluid and filter change so you can check yourself, as some transmission shops and mechanics will charge you a lot for that 15 clip, if they don't also charge you for a rebuild you probably don't need. If that's not it, the problem may still be obvious and you can still handle it yourself if you can see the problem. If you drop the pan, let us know what you find, and perhaps some photos if you can.

David
Thanks David-- At least I'm getting closer! I was going back and forth on whether to try what you are suggesting or just bring it to the shop. Since I purchased this car to be something I want to learn on and try to do everything myself, I've decided to give it a try. Bear in mind experience wise, I have done a good amount of mostly top end engine work, brake jobs, oil changes, etc, but really have never done anything with a transmission so again this is all new to me.

From what you are saying, I need to drop the pan on the tranny-- And I assume this will require fairly large drain pan underneath to catch the fluid, as the C4 usually has about 9qts of fluid correct? I know a good amount of that fluid is in the torque converter and I wouldn't be draining that...or would I? My main concern right now is just getting to the bottom of the issue-- so I'm hoping I can just drop the pan, take a few pics and see if I can see anything that's binding.
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post #17 of 47 (permalink) Old 05-14-2015, 11:16 AM Thread Starter
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Re: C4 won't shift into reverse or park suddenly

Quote:
Originally Posted by PSIG View Post
From your first description, it sounds like R-N-D-2, but it doesn't matter really. The point is that you now know the primary problem is in the transmission. The issue is either in the shift spool or the parking pawl linkage. If you are the type that can do an oil change, it is not a big deal to drop the pan and take a look, and is the same procedure as a fluid and filter change. While you are in there, take a look at the linkage going into the transmission and just inside, for how and why it is binding. When you drop the pan, you can see about half of the internal linkage, and it may have simply popped a clip off the linkage, where the fix is 15 and 2 minutes to replace it. If the linkage is binding at the rear, you would have to remove the extension housing, taking about another 30 minutes and a gasket to do.

You may want to consider doing the fluid and filter change so you can check yourself, as some transmission shops and mechanics will charge you a lot for that 15 clip, if they don't also charge you for a rebuild you probably don't need. If that's not it, the problem may still be obvious and you can still handle it yourself if you can see the problem. If you drop the pan, let us know what you find, and perhaps some photos if you can.

David
One more quick question-- I was assuming I had the c4, but someone on another forum told me it was a c6 but didn't say why. Is there a way to tell which transmission I have?
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post #18 of 47 (permalink) Old 05-14-2015, 12:21 PM
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Re: C4 won't shift into reverse or park suddenly

The one photo shows C6 which has an integral bell housing. C4 is separate.

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post #19 of 47 (permalink) Old 05-15-2015, 01:36 PM Thread Starter
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Re: C4 won't shift into reverse or park suddenly

Quote:
Originally Posted by PSIG View Post
From your first description, it sounds like R-N-D-2, but it doesn't matter really. The point is that you now know the primary problem is in the transmission. The issue is either in the shift spool or the parking pawl linkage. If you are the type that can do an oil change, it is not a big deal to drop the pan and take a look, and is the same procedure as a fluid and filter change. While you are in there, take a look at the linkage going into the transmission and just inside, for how and why it is binding. When you drop the pan, you can see about half of the internal linkage, and it may have simply popped a clip off the linkage, where the fix is 15 and 2 minutes to replace it. If the linkage is binding at the rear, you would have to remove the extension housing, taking about another 30 minutes and a gasket to do.

You may want to consider doing the fluid and filter change so you can check yourself, as some transmission shops and mechanics will charge you a lot for that 15 clip, if they don't also charge you for a rebuild you probably don't need. If that's not it, the problem may still be obvious and you can still handle it yourself if you can see the problem. If you drop the pan, let us know what you find, and perhaps some photos if you can.

David
So I finally went out and dropped the transmission pan-- I tried to see if there was anything binding when trying to manually shift the transmission, but didn't see anything that stuck out (again this is all new to me so I'm not really sure what I'd be looking for here). I have attached a few pics to see if you guys can see anything. I'm still only able to get 3 clicks on the transmission (4 gears).

Thanks!
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post #20 of 47 (permalink) Old 05-15-2015, 02:10 PM
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Re: C4 won't shift into reverse or park suddenly

The issue is the Shift linkage pin is in the INCORRECT slot on the Shift Pin it's self.

I've seen it happen before, loosen the linkage and place the shift linkage tip in the First slot of the Shift pin. All will be well after that.
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post #21 of 47 (permalink) Old 05-15-2015, 03:17 PM Thread Starter
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Re: C4 won't shift into reverse or park suddenly

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Originally Posted by FEandGoingBroke View Post
The issue is the Shift linkage pin is in the INCORRECT slot on the Shift Pin it's self.

I've seen it happen before, loosen the linkage and place the shift linkage tip in the First slot of the Shift pin. All will be well after that.

Hmm would you mind explaining what that is exactly haha! I've never worked on this before-- are you talking about the area I have circled in this pic? I did get under and notice there was a 2nd hole (closer to the rear of the car) that this could be moved to.

My only real concern is that I have been driving the car like this for 6 months with no issues whatsoever with the transmission. It had no problem shifting in all gears, and the transmission has not been touched since I had it...Is this something that would just happen all of a sudden?

Thanks for the info.
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post #22 of 47 (permalink) Old 05-15-2015, 07:46 PM
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Re: C4 won't shift into reverse or park suddenly

It just doesn't jump out of position.

There is a good chance the park rod is the culprit.

Remove the "E" clip from the rod and try the linkage.

I have also seen the detent spring break and cause the same thing.

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post #23 of 47 (permalink) Old 05-15-2015, 08:52 PM Thread Starter
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Re: C4 won't shift into reverse or park suddenly

Quote:
Originally Posted by Stuarta View Post
It just doesn't jump out of position.

There is a good chance the park rod is the culprit.

Remove the "E" clip from the rod and try the linkage.

I have also seen the detent spring break and cause the same thing.

Is the park rod the long curved bronze colored rod in the pics I attached?
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post #24 of 47 (permalink) Old 05-16-2015, 12:39 AM
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Re: C4 won't shift into reverse or park suddenly

So it is an early C6 I see . There is no way the selector pin can be in wrong slot
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post #25 of 47 (permalink) Old 05-16-2015, 04:37 AM
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Re: C4 won't shift into reverse or park suddenly

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Originally Posted by awiz88 View Post
Is the park rod the long curved bronze colored rod in the pics I attached?
Yes. Remove the "E" clip.

Upon looking at the bimetal spring it appears to be in good shape.

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post #26 of 47 (permalink) Old 05-16-2015, 04:25 PM
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Re: C4 won't shift into reverse or park suddenly

Do you see the shift pin sticking out of the valve body? The Forward side of that has a double slotted head, the INNER shift linkage arm the one that your circle is touching, the Far lower right side of that has a round end that sits in the END of that Pin in your valve body. I'm simply suggesting that it's in the wrong position on the shift plunger.
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post #27 of 47 (permalink) Old 05-16-2015, 05:19 PM
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Re: C4 won't shift into reverse or park suddenly

Quote:
Originally Posted by FEandGoingBroke View Post
Do you see the shift pin sticking out of the valve body? The Forward side of that has a double slotted head, the INNER shift linkage arm the one that your circle is touching, the Far lower right side of that has a round end that sits in the END of that Pin in your valve body. I'm simply suggesting that it's in the wrong position on the shift plunger.

But the picture does not show any of that.

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post #28 of 47 (permalink) Old 05-16-2015, 09:32 PM
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Re: C4 won't shift into reverse or park suddenly

Look at part number 7C389....


Your shifter piece could have slipped between the two heads. Please inspect it.
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post #29 of 47 (permalink) Old 05-16-2015, 09:33 PM
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Re: C4 won't shift into reverse or park suddenly

Just give it a go and LOOK for where the shift arm touches the plunger and moves it!

Remove the valve body if you have to. simple enough
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post #30 of 47 (permalink) Old 05-16-2015, 10:49 PM Thread Starter
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Re: C4 won't shift into reverse or park suddenly

Quote:
Originally Posted by FEandGoingBroke View Post
Just give it a go and LOOK for where the shift arm touches the plunger and moves it!

Remove the valve body if you have to. simple enough
I am going out tomorrow afternoon and do what I can, but I can not say enough to you guys that this is all completely new to me, and I'm doing everything suggested as I figure out what it is thats being suggested. Everyone seems to call different parts different names, is part # 7c389 the parking rod that Stuarta is talking about? Or do I need to drop the valve body to get any answers?

Feandgoingbroke-- Im just not exactly sure what your asking me to do, could you elaborate?

I do appreciate you guys taking the time to help me out!
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