Turbo 350 won't shift?
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Joined: May 2003
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From: Ewa beach Hi
Turbo 350 won't shift?
Aloha and Happy New Year to all!
Its been awhile since I logged on, you know how it is when you have sunny days and a hot Vette! I need some advice on a transmission malfunction. My trans will not shift. It stays in first gear. I checked all vacuum lines, they were good. I changed the module with no success. Help!
Its been awhile since I logged on, you know how it is when you have sunny days and a hot Vette! I need some advice on a transmission malfunction. My trans will not shift. It stays in first gear. I checked all vacuum lines, they were good. I changed the module with no success. Help!
Drifting
Joined: Sep 2004
Posts: 1,959
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From: North Bend Ohio
Are you sure you're getting vacuum to the modulator. I've never heard of this line pluging but anything is possible. The only other thing I could guess is a stuck valve in the valve body or a dirty filter.
Good luck.
BigBlockk
Later.....
Good luck.
BigBlockk
Later.....
Burning Brakes
Joined: Feb 2004
Posts: 958
Likes: 1
From: In the Beautiful Shenandoah Valley of VA
There's a very good chance that you have stripped the small plastic gear on the governor that meshes with the output shaft. Without the governor spinning, the rest of the transmission controls (the valve body) doesn't know that the car is moving and accelerating, and the transmission stays in first gear. Remove the cover (pressed into the housing and sealed with a large O ring) and slip the governor out to inspect the gear.
Steve
Steve
Le Mans Master
Joined: Sep 2000
Posts: 5,635
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From: Orlando Floriduh
It sounds like either the downshift cable is mal adjusted or stuck in the wide open throttle position, or the manual shift cable is not putting the trans in the correct position. I have seen the cable stretch and the lever at the trans not go past 1st even though the indicator was in drive.
Race Director
Joined: Sep 2004
Posts: 11,874
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From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by Larry B.
It sounds like either the downshift cable is mal adjusted or stuck in the wide open throttle position, or the manual shift cable is not putting the trans in the correct position. I have seen the cable stretch and the lever at the trans not go past 1st even though the indicator was in drive.
just for elimination sake i would manually get under the car with the car turned off and go through the gears by manually moving them.....and see if you can feel a mecahnical hang up some where...also after you have done it manually.....have somone else move the gear selector up top and see if you still have that full range of motion....
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Joined: May 2003
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From: Ewa beach Hi
Originally Posted by Steve's74
There's a very good chance that you have stripped the small plastic gear on the governor that meshes with the output shaft. Without the governor spinning, the rest of the transmission controls (the valve body) doesn't know that the car is moving and accelerating, and the transmission stays in first gear. Remove the cover (pressed into the housing and sealed with a large O ring) and slip the governor out to inspect the gear.
Steve
Steve
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Joined: May 2003
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From: Ewa beach Hi
I was able to change out the governer gear. The original was good but I changed it anyways. Replaced the modulator with a different one. I think the first was not the correct one. Checked the vacuum from the manifold it is good and strong. The fluid level is good but the transmisssion still will not go into high gear. Any other suggestions would be appreciated
