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Standard-4 locks out (1/4)
 2/2/20 5:52pm
Christian
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Houston, TX - USA

Vette(s):
1971 LS5 Convertible 4 sp


Joined: 2/25/2003
Posts: 181

The type of issue that happens every once in a while, not systematically (apparently) so it is hard to pin point the cause.

Well, not systematically “apparently”: Apparently, in fact, it looks like it only happens after reaching some fairly high speed – today was 110 mph (I just floored it for a few seconds and oooops!)

Then I can’t shift the gears anymore. As I downshifted to help slow down, I was able to disengage the 4th gear but not to engage any other gear, not even the 4th gear back. Not the first time it happens.

As I had enough speed built, I was able to get off at the next ramp and stop on restaurant’s parking.

Impossible to engage any gear at idle either. I had to shut the engine down. Then I could shift gears at will, with the engine stopped. Start the engine: Can’t engage any gear. Shut it down and gearbox seems to work fine. Next things, I start the engine with the 1st gear engaged – and the clutch fully depressed, of course. While moving the car in 1st gear, I was able to shift to 2nd gear, then to 3rd, etc. Gearbox went back to normal operation.

As this is not the first time this happens, I expect it to happen again. I may not be that lucky next time and be able to drive back home.

Any clue as to what exactly I should look at?

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Re: Standard-4 locks out (2/4)
 2/2/20 9:24pm
73shark
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 605

Might check your neutral gate alignment. That's really just a shot in the dark though.



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1973 L-82 4 spd

Re: Standard-4 locks out (3/4)
 2/2/20 9:25pm
Adams' AppleLifetime Member
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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: 19688

I would suspect the clutch assy is sticking at high RPM.

 



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Joel Adams
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Re: Standard-4 locks out (4/4)
 2/3/20 12:08am
73shark
Standard Member
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Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.


Joined: 7/9/2003
Posts: 605

If there's no load on the transmission and the engine is running, you can normally shift gears as long as the car is moving.



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1973 L-82 4 spd

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