Calling all 4 speed owners
Thread Starter
Burning Brakes
Joined: Dec 2021
Posts: 805
Likes: 260
Calling all 4 speed owners
Hi all , I own a 75 4 speed and she runs and shifts great , however I notice sometimes on certain angles of the road it will be hard to put in first gear. Is this quote normal or something I should address.. also is there any general maintenance I should be doing to maintain smooth shifting thanks
Melting Slicks
Joined: Feb 2018
Posts: 2,328
Likes: 724
From: Marietta GA
It might be helpful to safely jack up the car and take a few pictures of the shifter mechanism/parts. Once you post some pictures, I am sure the guys on the Forum will be able to offer some advice.
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,137
Likes: 4,248
From: US-PNW
Like what kind of angles are you seeing this? (Are you downshifting into first?)
When it's up in the air, check the engine mounts too. If the engine is lifting it could cause misalignment of the clutch linkage so that it's not fully disengaging for a shift.
When it's up in the air, check the engine mounts too. If the engine is lifting it could cause misalignment of the clutch linkage so that it's not fully disengaging for a shift.
Thread Starter
Burning Brakes
Joined: Dec 2021
Posts: 805
Likes: 260
Thread Starter
Burning Brakes
Joined: Dec 2021
Posts: 805
Likes: 260
Le Mans Master
Joined: Jun 2019
Posts: 7,658
Likes: 2,470
From: Indiana
There are no fittings im aware of.
- check transmission fluid…if not changed in memory…change it..i like synthetic
- inspection and pictures of linkage..loose nuts etc..
- linkage alignment
- clutch adjustment verification
post 59 to 6x may be helpful
https://www.corvetteforum.com/forums...etc-diy-3.html
- check transmission fluid…if not changed in memory…change it..i like synthetic
- inspection and pictures of linkage..loose nuts etc..
- linkage alignment
- clutch adjustment verification
post 59 to 6x may be helpful
https://www.corvetteforum.com/forums...etc-diy-3.html
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,137
Likes: 4,248
From: US-PNW
Isn't there a grease fitting on the clutch cross shaft (z-bar)? My '67 has one but have an auto in my '72, so don't know.
Alan71 and others talk about it here and methods to lube the fittings:
https://www.corvetteforum.com...z-bar-restore-tips...
Grady, forgot to ask: Is the difficulty just in the effort required or is the difficulty on the verge of grinding gears?
Alan71 and others talk about it here and methods to lube the fittings:
https://www.corvetteforum.com...z-bar-restore-tips...
Grady, forgot to ask: Is the difficulty just in the effort required or is the difficulty on the verge of grinding gears?
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Race Director
Joined: Mar 2017
Posts: 11,953
Likes: 4,510
From: Virginia
Your shop manual has the procedure to adjust the clutch linkage. Perhaps some worn engine and/or transmission mounts are causing the engine to move relative to the clutch shaft.
Do you have a crossmember-mounted (stock) shifter? The movement could be seen there, too.
Get under the car (safely!) and take some pictures!
Do you have a crossmember-mounted (stock) shifter? The movement could be seen there, too.
Get under the car (safely!) and take some pictures!
Le Mans Master
Joined: Jun 2019
Posts: 7,658
Likes: 2,470
From: Indiana
Isn't there a grease fitting on the clutch cross shaft (z-bar)? My '67 has one but have an auto in my '72, so don't know.
Alan71 and others talk about it here and methods to lube the fittings:
https://www.corvetteforum.com...z-bar-restore-tips...
Grady, forgot to ask: Is the difficulty just in the effort required or is the difficulty on the verge of grinding gears?
Alan71 and others talk about it here and methods to lube the fittings:
https://www.corvetteforum.com...z-bar-restore-tips...
Grady, forgot to ask: Is the difficulty just in the effort required or is the difficulty on the verge of grinding gears?
another great place to besure it is not loose.
Time for pics and inspection !
