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Slips From Park to Reverse

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bigcalhoun View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bigcalhoun Quote  Post ReplyReply Direct Link To This Post Topic: Slips From Park to Reverse
    Posted: 19-June-2022 at 2:14AM
Gents,
I recently inherited my father's '68 Torino.  It was the first new car he ever owned and the car that brought me home from the hospital when I was born.

It's entirely original, has been garaged kept and well maintained its entire life until my dad got where the couldn't work on it much any more.

When you crank it the automatic transmission column shift lever is slipping from P to R so I crank it in N.  Similarly, if you are in P and the vehicle is running, it will jump to R if you rev it at all.  My first thought is the point of the shift lever inside the column is worn but I would welcome advice or good ideas on that.

I've done some initial looking around for a new shift lever and '68 Torino ones aren't easy to find.  If anyone is aware of one from another model I should look for that would be helpful too.  

I'm sure it's appropriate I'm posting this on Father's Day.  Working on that car helps me feel closer to my father.

Ali
'68 Torino, 302
'70 F-100, 302
Mt. Pleasant, SC
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Eliteman76 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Eliteman76 Quote  Post ReplyReply Direct Link To This Post Posted: 22-June-2022 at 12:27PM
Parking pawl is worn out. For decades, Ford had warnings to *ALWAYS* set the parking brake on any automatics. Not uncommon on older cars for it to just pop into reverse with little to no warning.

The issue is it's internal to the transmission.

Not to say after 50+ years you do not have slop in the linkage off the column, but odds are, it's the parking pawl in the transmission itself. The guy doing the video is a Ford Master Tech that runs a shop. Very good guy to watch on youtube.
https://youtu.be/eh988eSAPc8






 
Andrew: Long time Torino guy and GTS.ORG admin
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Steve M. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve M. Quote  Post ReplyReply Direct Link To This Post Posted: 22-June-2022 at 1:21PM
Definitely address that issue.  It almost cost me a car.
Steve M.
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bigcalhoun View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bigcalhoun Quote  Post ReplyReply Direct Link To This Post Posted: 22-June-2022 at 11:47PM
Much appreciated.  I’ll check it out.  Definitely need to resolve this issue.
Ali
'68 Torino, 302
'70 F-100, 302
Mt. Pleasant, SC
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green 72 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote green 72 Quote  Post ReplyReply Direct Link To This Post Posted: 23-June-2022 at 4:41AM
also check motor mounts and transmission mount. They can shift around when when reving the motor causing the linkage to pull out of park

Dan                             1972 GTS Formal       
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72 RS 351 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 72 RS 351 Quote  Post ReplyReply Direct Link To This Post Posted: 23-June-2022 at 6:14AM
This is all interesting, I didn't know the park issue was common at all. I'll have to pay close attention to the shift linkage and parking pawl, plus the floor shift assembly in my projects.
Don
73 Ranchero Sport "72 front end", floor shift/console, planning EFI 7000rpm 351-4V &4R70W
73 Ranchero GT 351C-4V 3.70 gears for sale later.
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californiajohnny View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote californiajohnny Quote  Post ReplyReply Direct Link To This Post Posted: 23-June-2022 at 6:18PM
 iirc it seemed to be mostly c-4's that did that, usually wear and the linkage out of adjustment will keep it from fully locking into park but yes if it has wear internally that would add to the situation too!!!
 if you feel any extra amount of play i'd check each bushing on the whole linkage system and replace any that are worn! also disconnect the linkage and click the arm in each detent position in the tranny too
JOHN
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Wayner315 Quote  Post ReplyReply Direct Link To This Post Posted: 24-June-2022 at 2:48AM
Mine had a hard time going into park, had to rock the shifter a couple times from R to P. Like Johnny said, if you make sure the shifter on the tranny clicks into park easily and there's no visible wear in the tranny internal linkage or pawl then issue can be in the shifter bushing/seal or linkage up to the column.
72 Gran Torino formal roof Brougham
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Post Options Post Options   Thanks (0) Thanks(0)   Quote handsofstone Quote  Post ReplyReply Direct Link To This Post Posted: 24-June-2022 at 3:14AM
Even on the bench, manually shifting to park you will feel the spring loading up as the rod is what actually activates the parking pawl. As soon as you slightly rotate the output shaft it audibly clicks into place. At that point there is still some spring pressure on the rod though very slight. 
  You feel it when you park and remove the key, lef off the brake and the car rolls an inch. That click is the pawl engaging and unloading the spring that allows the tapered "ball" to lock the pawl in place. The location of the pivot point for the pawl rod setup takes away a lot of the "feel" in your  shifter due to linkage geometry. Worn bushings were very common and easy to replace. 
  I have yet to find the boxes of bushings from my Aamco days but I found most of the o-rings. 
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