Re: lq4 4l80e drive shaft cost?
ive shortened several stock driveshafts. its pretty simple, just mark about 12" with a single line from the end you are trimming inward, cut the shaft at the correct spot for the length you need to remove. (measure from the weld on the end) cut the weld and get the piece of metal off, the shaft end sleeves into the main tube so dont damage that. sleeve the end into the tube, line up your marks from before, and weld around it. i do about 1" length welds evenly around the shaft.
i did this with the shaft in my s10. ive gone well over 100mph with 3.73 gears and 25" tires without any noticeable vibration