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1/31/10 5:48pm - Original Message: 'Shifter problem-Need ideas -UPDATE'
ranger3 Lifetime Member
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North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176
Hey Guys,
I took the 75, all stock automatic, out for a drive today.  I went for about 25 miles and came home. The only thing I noticed while driving was that when I came to a stop and idled, the car seemed to shaking a bit, like a loping cam. The car shifts fine through the gears.
 
When I got in the driveway and shifted into Park, the shifter felt like it took much less effort, than normal, to move through the different gears. Once in park, the key would not move past the first detent. By this, I mean turning off from the running position. It will not go into the lock or accessory positions. I can pull the key out, even though the ignition is not in the locked position. I tried several different keys, with the same result.
 
I then cranked the car again and put the car in drive, then reverse, then back to park. The transmission is in the gear the shifter is aligned with in the shift indicator. Also when placing the transmission in gear, the shifter doesn't feel like it has a much resistance as before.
 
The ignition/key situation seems to be related to the shifter problem. I need some ideas on where to start looking. Could it be a broken transmission mount or motor mount? If so, is this causing some kind of problem with the shifter. To the best of my knowledge, the transmission has never been out of this car. Help!
 
Thanks,
 
Scott
 
ranger32010-02-06 10:27:32
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1/31/10 6:35pm - Reply: 'Shifter problem-Need ideas -UPDATE'
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Oklahoma City, OK - USA

Vette(s):
1972 LS5 Convertible,Auto.Targa Blue with Black Interior.

Joined: 4/1/2007
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It sounds like it may be the cable that runs from the side of the transmission up to the steering column. Since you said it shifts easier I'm wondering if the cable has broke or came off at the column or down on the side of the transmission. It's held on by a cotter key on each end.
Lonnie


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1/31/10 6:48pm - Reply: 'Shifter problem-Need ideas -UPDATE'
ranger3 Lifetime Member
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North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176
Thanks Lonnie, that's a great idea. I need to get the car in the air to take a look. I've had no previous problems with the car and this just started today. Thanks for the clue.
Scott


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1/31/10 11:33pm - Reply: 'Shifter problem-Need ideas -UPDATE'
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
I agree with Lonnie's assessment. This would explain the easier shifter movement, as well as being able to remove the key, without it being in the "Lock" position.
Don't know about the vibrating/loping issue, tho...that could simply be from sitting in storage too long?


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Joel Adams
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1/31/10 11:36pm - Reply: 'Shifter problem-Need ideas -UPDATE'
ranger3 Lifetime Member
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North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176
Thanks Joel. If it is the cable, is that difficult to replace? Also, what's the correct name of the part?
 
Scott
ranger32010-01-31 20:42:55

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2/1/10 9:21am - Reply: 'Shifter problem-Need ideas -UPDATE'
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
Shift column interlock cable...I think that's what it's called...
It's not too hard to change, It simply connects to the shift linkage on the trans at the bottom, and the column at the top. Check to see if it just came loose, as the clips/pins can fall out mysteriously.


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Joel Adams
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2/1/10 11:40am - Reply: 'Shifter problem-Need ideas -UPDATE'
ranger3 Lifetime Member
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North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176
Thanks Joel and Lonnie. I will take a look at it soon. I really appreciate the information.
 
Scott


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2/1/10 12:04pm - Reply: 'Shifter problem-Need ideas -UPDATE'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
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Should I have one of those on a 79? I don't think I do!!

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2/1/10 2:12pm - Reply: 'Shifter problem-Need ideas -UPDATE'
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
Yes....as far as I know, all Sharks had them...with the exception of the '68s with the key in the dash.
There is another thread here with a similar issue, with some pics of the cable under the hood. It was fairly recent.
Adams' Apple2010-02-01 11:28:43

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Joel Adams
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2/6/10 1:33pm - Reply: 'Shifter problem-Need ideas -UPDATE'
ranger3 Lifetime Member
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North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
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First let me say a BIG thank you to Lonnie and Joel. For the benefit of those that may experience a similar problem, the cable was siezed in the outer housing, therefore not moving anything, just curling up on the lower end at the tranny clevis. I removed the cable and soaked it with PB Blaster. It freed up almost immediately. I exercised it for a while until it was as free as a new cable. Reinstalled and everything works like it should. Shifter and ignition lock all operating normally now. Thanks to all. This kind of assistance is what makes this site so great.Clap

Scott


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2/7/10 10:20am - Reply: 'Shifter problem-Need ideas -UPDATE'
ranger3 Lifetime Member
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North Charleston, SC - USA

Vette(s):
1975 L48 AT AC T-top

Joined: 3/20/2004
Posts: 4176

Scott



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2/7/10 10:50am - Reply: 'Shifter problem-Need ideas -UPDATE'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
I checked out the other thread - my column does not have the eye on it for the cable to attach to. BUT - I can not pull the key out in any position other than Lock...

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2/7/10 12:18pm - Reply: 'Shifter problem-Need ideas -UPDATE'
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
But...can you move the shifter out of Park with the key in the "Lock" position? That's really the purpose of the system...it's more of an anti-theft deterrent, as well as to keep someone(young-uns) from accidentally knocking the car out of park/reverse.
Being able to remove the key from the cylinder in any position other than "Lock" is strictly a function of the key cylinder. If the key will turn to "Lock", then the key will come out. The problem we see is that sometimes, the shift interlock cable will not allow the sleeve on the column to turn so that the key cylinder can be twisted to the "Lock" position, which makes it hard, if not impossible, to get the key out.
If you remember the older style, column shift automatics, the gear lever was attached to a sleeve/barrel on the column that would turn/move when you moved the shift lever up/down to go into reverse, neutral, drive, etc. On the console shifted automatics, the sleeve is still there, but instead of being attached to a lever, it has a cable that operates it from the trans. When you move the shifter on the console, the sleeve will turn...you can see it move, just like it would with a column shift lever. A lot of times, when the cable is messed up, and you can't get the key out, you can reach up by hand and twist the sleeve on the column, and get the key to turn to "lock", and remove the key.
Hope this makes sense. If I get time today, I'll take a pic or two of the set-up...it might help.


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Joel Adams
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2/7/10 12:22pm - Reply: 'Shifter problem-Need ideas -UPDATE'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
Now I unnerstand Joel!! I'll try to take it out of park with the ignition in the lock position and let you know wha hopponWacko

I'm guessin that I'll be able to run all the way through, since mechanically, there's nuffin ta stop it...


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2/7/10 5:51pm - Reply: 'Shifter problem-Need ideas -UPDATE'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
Sher enuff - I can put the car all the way thru da gears while in Lock. I do have the firewall mount, but no attachment eye off of the column....where that part is, I donno...Shocked LukesVette2010-02-07 14:52:59

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2/7/10 11:44pm - Reply: 'Shifter problem-Need ideas -UPDATE'
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19448
Your car may have been an export car, too.

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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2/8/10 11:27pm - Reply: 'Shifter problem-Need ideas -UPDATE'
lukesvette Lifetime Member
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HOWELL, NJ - USA

Vette(s):
1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

Joined: 5/18/2004
Posts: 6804
Checked my very spotty tank sticker - Car was built in St Louis and delivered to White Allen Chevrolet, Dayton Oh. - I don't see an export code listed in the options.

Bubba musta got in dere a while before I got the Lukester...Confused


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God Bless America

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