C6 transmission park function

[1976kjell]

Hi

This is a forum for FE engines, but I hope its ok to ask a question about C6 trans

Its a relatively simple question; in park, the trans "jumps" out of park-postion. A shop was going to adjust it externally, but concluded that its something inside the trans that has to be replaced or adjusted. Is it a way to adjust or check the function of the park pawl without disassemblying the extension tail of the transmission?

[Drew Pojedinec]

I can't help on why it's jumping out, my guess is the spring isn't pushing the pawl that well.  Anyway I included a photo from one of my transmission builds so maybe you can get a visual on it.

[Drew Pojedinec]

Sorry I couldn't find a larger photo.

[1976kjell]

Thanks for the picture. I assume the extension tail anyway has to be removed

[Drew Pojedinec]

yes, but that is all.....
if you jack the rear of the vehicle high enough very little to no fluid falls out.

[jmlay]

The internal rod could also be bent.

[cammerfe]

What sort of shifter are you using? When I was in QC at T&C Livonia, we had a spate of trouble on C6 transmissions with the park function. It was due to the shifter not pushing the park rod far enough to completely get the pawl into position, or not holding it there. If the rod backs off, so will the pawl.

Another possibility is that the park mechanism has been 'chewed' by putting the trans in park when the car isn't completely stopped, and causing it to 'ratchet' down to zero. After a few times, the detents aren't all they should be.

Just a few possibilities.

KS

[1976kjell]

Thanks for helpfull hints so far. The original black ball shifter that originally controlled the cruise-o-matic-trans is still used. The lever on the attached image is installed, so it should be enough travel and possibility to adjust to get it work. In spite that the shop ment it was something inside the trans that didnt work, the external mechanism will be checked before eventually removing the tail housing and eventually the pan

[Gregwill16]

Agree with Cammerfe, start with the linkage/shifter first. I had one on my 69 Mustang that was not allowing full travel and it would not hold.

[C6AE]

Could be a defect, it is an old known problem, with an "almost" recall. Back,in 1968 my mother lost a car down the hill and into a pond because of this!

https://www.autosafety.org/ford-transmissions-failure-hold-park/

[e philpott]

Pull the pan first and check linkage, correct whatever you see and verify operation, pull tail shaft if needed

[stubbie]

Check your detent plate. The corners of the detent plate become round after years of operation.

[1976kjell]

I understand that the detentplate "holds" the stick in posistions, but where is the detentplate located in a 63 Galaxie with floor shift? Tried to google, but didnt found an answer

[cammerfe]

In the shifter mechanism.

KS

[e philpott]

It's inside the Pan