From the factory TF Service Bulletin, running changes for the '74 model year:
"Neutral to Drive shift quality
A-727 only
The N-D package for the A-727 also required the following changes in the rear clutch. The Belleville spring has a higher load and a reduced cone height and thickness. In the clutch retainer, the Belleville spring seat and cushion ring groove were moved forward. The over-all height of the piston was also increased. The piston and Belleville will not service prior models. The clutch retainer will service prior models."
Moving forward with the discussion on this upgrade...per John's post of the service bulletin, Do I need to do somthing to the piston retainer as there appears to be changes made there as well for the '74-up parts. How about the plastic cushion spacer? Is it the same or do I need 74-up specific one?
