What causes this?
Thread Starter
Racer
Joined: Feb 2008
Posts: 316
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From: Warwick Rhode Island
What causes this?
I recently had a problem with my TH350 when I pulled into the garage Saturday after a 3 hour cruise. I had no problems during the entire cruise, but when I pulled in I couldn't shift the car into park - reverse was the farthest up it would go. I didn't want to force it and eventually turned the car off in the neutral position. I finally got around to being able to look at the car last night and managed to massage (read push) the shift lever up into park and I held it there so I could start the car. I immediately took it for a ride and all was well in corvetteland again as the car would now go into park. Then today I noticed this - when I stop the car on a rearward incline and shift into park, the car will roll about 1-1/2 to 2 feet before stopping. This never happened before and I'm not really pleased from a safety standpoint seeing how well our emergency brakes tend to work 
Any ideas? I want to add that I do have a slight leak from my transmission pan gasket, but nothing I'd consider to be major. Did I damage something applying pressure to get it back into park? Could it be from low tranny fluid?
Any ideas? I want to add that I do have a slight leak from my transmission pan gasket, but nothing I'd consider to be major. Did I damage something applying pressure to get it back into park? Could it be from low tranny fluid?
also check the shifter mounting hardware, you dont want to tear up the park pawl.....
Le Mans Master
Joined: Oct 2006
Posts: 7,123
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Low fluid won't have any bearing on this one. Park is 100% mechanical. Either the shifter (or cable) has a problem or there's an issue with the park pawl in the trans. This picture s a 400, but a 350 has the same basic parking setup. Look at the top of the trasn inside the case- there's a rod that runs from the selector shaft to the rear. In park, that rod is pushed to the rear- there's a spring on the rod and a cone under a guide. The cone pushes on the park pawl and forces it into lugs on the output planetary gear that's splined to the output shaft.
This picture shows the rod a little better- down the right side:
This picture shows the rod a little better- down the right side:
Thread Starter
Racer
Joined: Feb 2008
Posts: 316
Likes: 0
From: Warwick Rhode Island
Thanks for the replies. I'll check that out since I need to change out the pan gasket anyway. What would cause the car to roll before engaging/coming to a stop? Is it the same problem?
Racer
Joined: Feb 2009
Posts: 343
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From: San Diego CA
