Did they replace them all together, or just place them inside of the sure grip springs? I can't imagine the 727 clutch springs are stronger than the stock cone sure grip springs.
"Well, I need to clarify something concerning cone type SG's and their lack of being able to be rebuilt. They can be and there was an article in High Performance MOPAR Magazine, May 1997, PGS 28-30 where they did it. They removed 0.080" off each cone in a lathe and installed a 727 high clutch piston return spring (one each) into the center of each of the four original springs. I have never done nor met anyone who has rebuilt a cone SG nor know of a company who does. The article is fairly easy to follow with good pictures" Mopar Rear Ends / Differentials / Etc
