I have been moving my GT-37 around from bay to bay in my garage, and I find that every time that I take the gear selector from the R-1 gate and shift to neutral,or try to shift into the 2-3 gate the trans. locks up in 1st gear. The gear shift is in the neutral position and locked. When I get under the car I just simply have to push the R-1 linkage towards the front of the car and it releases. i had some problems with it before I put the car up years ago. I attributed it to one of or both things that had been done to the trans. First I had completely worn the clutch out and it seemed to get worse as the clutch did. Second I removed the reverse safety switch from the steering column. When I picked up the car from where I had left it , I put a new clutch in it and I just recently re-installed the reverse safety switch. Still the same problem. It is 3-speed on the floor. I have not got the #'s from the trans yet and do not know the brand name. I know that it is the original trans. and linkages (Hurst shifter ). 11" clutch with an 8 spline front shaft on the trans. All of the linkages seem to not have any excessive play nor is there any leaking from around the shafts in the trans. I am just starting the restoration and would like to know if anyone has had this problem, or thinks that a trans. swap is in the future for me. Thanks, and Happy Father's Day to all.

I have been moving my GT-37 around from bay to bay in my garage, and I find that every time that I take the gear selector from the R-1 gate and shift to neutral,or try to shift into the 2-3 gate the trans. locks up in 1st gear. The gear shift is in the neutral position and locked. When I get under the car I just simply have to push the R-1 linkage towards the front of the car and it releases. i had some problems with it before I put the car up years ago. I attributed it to one of or both things that had been done to the trans. First I had completely worn the clutch out and it seemed to get worse as the clutch did. Second I removed the reverse safety switch from the steering column. When I picked up the car from where I had left it , I put a new clutch in it and I just recently re-installed the reverse safety switch. Still the same problem. It is 3-speed on the floor. I have not got the #'s from the trans yet and do not know the brand name. I know that it is the original trans. and linkages (Hurst shifter ). 11" clutch with an 8 spline front shaft on the trans. All of the linkages seem to not have any excessive play nor is there any leaking from around the shafts in the trans. I am just starting the restoration and would like to know if anyone has had this problem, or thinks that a trans. swap is in the future for me. Thanks, and Happy Father's Day to all.

Seems like the clutch needs to be adjusted. The same thing happened to my 71 Camaro. Off of the z-bar there is an adjuster the goes from the z-bar to the clutch fork. Maybe the clutch isn't fully engaging.

Take some time and crawl under the car and check the linkage!
If it is binding it will stick in a gear.
Watch the reverse lever carefully. If the levers are not aligned properly you will have problems. ;)

I would have to agree with Blackcat. I would loosen the bolt on Reverse-1st shift lever arm and try to pull the arm out a little, by wiggling it, just to see if it wasn't seated properly.

I've got a 74 bird with a 4 speed. Same problem! Turned out to be what Blackcat and HFR said. I got the shifter unjammed, and put it in nuetral. The 1-2 shift fork was'nt lined up with the rest of them. Put my alignment rod in, adjusted the linkage, and haven't had a problem since.

I am putting a deck on for my new pool, so as soon as I get the chance I will give it a shot. Thanks to all for the great advice.