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I have a 69 Chevelle with a T-400 that does not seem to shift into 3rd gear. Any ideas? Its all stock.
 

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does it go into third but just not pull or not go into third at all
Does not shift into 3rd. Will go in reverse no problem and 1-2. Valvebody?
 

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Has this trans ever been worked on? Is it still an automatic shift? Did it ever work properly?


Hutch
No its all stock. Yes it has the vacuum modulater on it. Yes it did work properly. Seems all of a sudden?
 

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No its all stock. Yes it has the vacuum modulater on it. Yes it did work properly. Seems all of a sudden?
I had a customer with this problem last spring, bought a car from the west coast & drove it around for a couple months then all of a sudden no third gear.

It was the third gear accumulator, which is the piston assembly that is located in the valve body. The one I worked on had broken the retaining clip & over traveled the acc. piston which in turn not allowed third gear.

Either way you should at least drop the pan & from there you can pull the valve body down.

Hope this helps
Dave
 
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