The 68RFE stock center support has numerous flaws that become problematic in both stock and modified trucks. The stock housing is made of very soft cast aluminum. The soft casting allows for the steel clutch plates to dig into the side of the casting thus causing clutch release issues, rattling and eventual total failure of the 4th clutch and the housing. Please see the picture of the destruction that happens from these two issues in the OEM assembly.

The second issue the stock housing suffers from is the 4th clutch snap ring blowing out of its groove and destroying the housing. Our competitors sell a cheap aluminum snap ring retainer that does nothing other than look pretty. The snap ring will blow out of the groove just as easily as the stock non retained ring will.