I just put a rebuilt headlight motor on my 90 GTA.The headlight goes up farther than it needs to and also goes down to far.Is there a way to adjust it?

 

There is a threaded shaft with a slot and a sheet metal locknut on it on the end of the motor that adjusts the stroke of the motor. Undo the sheet metal locknut and adjust the threaded shaft in or out, then tighten the locknut. I don't know if there is enough adjustment if you assembled the large nylon gear too far off from its original position. That is why in the instructions I include with my headlight repair kit, I caution to mark the original location of the nylon gear and the location when you've pulled out the motor. The worm drive of the motor will rotate the nylon gear closkwise as you disassemble it. It will rotate counter-clockwise as the motor is reinstalled to the body as it meshes with the teeth of the nylon gear. Some other kit manufacturers instructions advise to keep the gear from rotating as you remove the motor. But that can damage the teeth of the nylon gear. On the version of the headlight unit that has the actuator rod going through the side cover, the worm drive of the motor has to be removed from the nylon gear. There is a molded lip on the nylon gear that won't clear the teeth on the worm drive. So the nylon gear will hang up on the worm and not release without damaging that lip. If you replaced the OEM nylon gear with the brass machined aftermarket ones this won't matter, since the teeth are cut all the way through and there is no lip. On the other version that has no hole in the side cover, the nylon gear can be removed without removing the motor. Here is a link to the instructions I include with my kits: http://www.gmperformance.org/TDS/Doc...structions.pdf

Good luck,

Lon

 

Thanks for the reply.I saw the threaded shaft you are talking about,I did notice there were a couple more threads showing than the one I took off,but I didnt want to mess with it until I checked the adjustment on the car. I guess I will have to take it back off since it is on the bottom of the motor. I'll just adjust it to match the original. I bought the motor already rebuilt,my motor was completely shot.I checked it by hooking rite to the battery and it did nothing,I had already replaced the bushings and gears.