First timer. 4 speed rebuild issues

Back up the bus guys
That is an overshift alright, ;
1)are the two special long-shoulder bolts in the correct cover-holes? Take a look at your case on the two vertical mounting rails. you will see two counter-bored holes to receive the long-shoulder bolts. If these are not in there, then the cover could be misaligned and anything can happen.

1a.) I never put the side cover on. Just checking to make sure it went into each gear. I do have the correct bolts though.



2)And while the shifter may attempt to overshift, the internal detent stops in the side cover are supposed to prevent that. So the 70 and older cover have the interlock pin with the two balls and spring.Go take a look at your cover. If you have this early cover, shift the front lever into either gear, then attempt a shift into 2nd.Firstly it should be impossible and secondly, the lever should just perceptibly move.
If that is how yours is working, then the problem is not in the cover.

2b) I do have the early style cover. I will try that after work.


3)Next grab the output shaft, and attempt to move it into the tranny and attempt to yank it out the back. There should be ZERO back and forth movement. If it moves, there is a problem in the bearing or in it's locating system. Be rough with it. ZERO movement is what you are looking for.

3c.)It doesn't move at all. I seen a picture of the different style snap ring and thought I put mine in wrong. not the case its the old style.
"If you have an A-Body, a pre-70 B-Body 23-spline trans, or a 66-67 18-spline, the rear bearing is a 307, and the snap-ring needs to be squeezed together to remove the shaft. The 70-and-up B- and E-Body trannies, and the 68-and-up 18-spline trannies have the 308 rear bearing. the snap-ring needs to be expanded to remove the shaft."


4)So once that is also proved ok, then you have to look to the brass rings. If they sit too low on the cone-clutches, then the slider will carry the struts too far forward and then they pop out on the backside, making it impossible to backshift when the assy is spinning. Sometimes after the driveshaft stops turning, then it may or may not backshift.

4d.) Brand new kit from brewers. The old ones were shot and doing exactly this.


5) the spring is in no way responsible for this.

5f.) Thank You.