1987--700R4 Park Issue
Thread Starter
Burning Brakes
Joined: May 2010
Posts: 941
Likes: 10
1987--700R4 Park Issue
!987 Vette
The Previous owner installed a new shift cable. When I bought the Vette, Park was intermittent. Sometimes it would hold as normal, other times ratchet, other times no park at all. My Chevy Corvette Factory Shop Manuals have arrived. And in Section, Automatic Transmission on Car Service 7A2-3 adjustment is directed as follows;
1. Place control lever in neutral
2. Raise Car
3. Loosen cable attachment at shift lever
4. Rotate shift lever clockwise to park detent and then back to neutral
5. Tighten Cable attachment to 15 ft pounds. Hold lever out of park while tightening
I have been thru this procedure 5 times, yet I can not get positive park. 4 of the times, I could easily push the Vette in my shop. The 5th time park ratcheted but would not hold.
As a test on the 700R4, I shifted the transmission selector to park, then I loosened the cable attachment point and manually shifted the transmission lever to park. Park is then solid and car can not be pushed. However, this is not the proper procedure and I am not sure if all shift detents are really in the detent. I dont want to do any damage.
The cable retention bracket to the pan bolts is solid.
What am I doing wrong or any suggestions.
thanks
8Valve
The Previous owner installed a new shift cable. When I bought the Vette, Park was intermittent. Sometimes it would hold as normal, other times ratchet, other times no park at all. My Chevy Corvette Factory Shop Manuals have arrived. And in Section, Automatic Transmission on Car Service 7A2-3 adjustment is directed as follows;
1. Place control lever in neutral
2. Raise Car
3. Loosen cable attachment at shift lever
4. Rotate shift lever clockwise to park detent and then back to neutral
5. Tighten Cable attachment to 15 ft pounds. Hold lever out of park while tightening
I have been thru this procedure 5 times, yet I can not get positive park. 4 of the times, I could easily push the Vette in my shop. The 5th time park ratcheted but would not hold.
As a test on the 700R4, I shifted the transmission selector to park, then I loosened the cable attachment point and manually shifted the transmission lever to park. Park is then solid and car can not be pushed. However, this is not the proper procedure and I am not sure if all shift detents are really in the detent. I dont want to do any damage.
The cable retention bracket to the pan bolts is solid.
What am I doing wrong or any suggestions.
thanks
8Valve
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
I dont think you are making anything wrong
I Think something is wrong with your cable
I went thru the same , bought a new cable and perfect park !
http://forums.corvetteforum.com/c4-t...-engaging.html
I Think something is wrong with your cable
I went thru the same , bought a new cable and perfect park !
http://forums.corvetteforum.com/c4-t...-engaging.html
Race Director
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
Where the cable attaches to the tranny is a lever that has an adjustment slot. Loosen the nut on the opposite end of the cable attachment, put the shifter on the console and the lever going into the transmission in park, and carefully tighten the nut without shifting the cable position and you should be good to go.
Last edited by 383vett; Jul 22, 2010 at 04:27 PM.
Thread Starter
Burning Brakes
Joined: May 2010
Posts: 941
Likes: 10
Where the cable attaches to the tranny is a lever that has an adjustment slot. Loosen the nut on the opposite end of the cable attachment, put the shifter on the console and the lever going into the transmission in park, and carefully tighten the nut without shifting the cable position and you should be good to go.
8Valve
