1993 suburban 3/4 ton automatic trans all forward gears no reverse

Does this mean that the reverse actuator needs to be replaced or at least the rod inside of it . I lost reverse in my 93 suburban and someone told me to take out the reverse actuator and weld 2 mm to the tip. And I noticed that they sell a new end to put on the shaft instead of welding it only $6 so I purchased and will try once I have the parts.because my tranny as no issues going forward and never even slipped in reverse it worked then it didn't. I'm just trying to get ideas instead of just junking thee tranny