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for those that have adjusted their manual steering gear, did you use the procedure shown in the GM service manual and apply the torque wrench to the steering wheel nut, or did you completely remove the gear and attach the wrench directly to the shaft and make adjustments? Reading a couple different procedures and wondering which is the better way to go. Sounds like if I remove the flex coupling to completely remove the gear, there is a little more work to reinstalling it, where I wouldn't have to touch it if I just put the torque wrench on the steering wheel like the GM manual suggests. only disadvantage is having to adjust lash, then go back to the wheel and so on. Still sounds like less work than taking the flex coupling apart, but maybe that's nothing either. Bolts on the flex coupling are also pretty rusty, so that could turn into a big job, though it would be nice to get the parts out and cleaned up and give them a fresh coat of paint.
just pull the box and do it on a bench. the measurements required are quite precise and must be done properly in order for success. having it on clamped in a vise make this easy. easier to pull the cap and inspect and relube too.
From: going faster miles an hour...with the radio on in browns mills new jersey
On my 65 GTO I did it on the car. It took less than an hour and made a world of difference. On my vette I took out the box, took it apart, checked the bushings, etc, etc, did it on the work bench. It really depends on what your goal is with the project.
Either way is fine as long as you remove the pitman arm before you start the procedure. If you have ever had the rag joint off you know there is virtually no drag in the steering column. Just make sure you use a torque wrench with 25 in-lb full scale to get accurate settings.
You can do it both ways, but it's better to do it on the bench. As the guys said, if you're going to adjust the lash you might as well check the grease by removing the cover. My own opinion is to go through it at that point since you have it out and are going to adjust it anyway.
If you have any questions let me know and I'll walk you through the job.