Window Regulator rebuilding service

I understand. The regulators in those doors without vent windows were more prone to failure. 99% of the time it's the drivers door regulator that fails. In most of those its the manually operated drive gear bearing assembly that is worn out im those.
Replace that with the assembly from the rear window regulator from a much newer model. Most of those are like new. Clean and lubricate all of the moving parts and tracks. Should be good for another 20 years.