th400 second gear intermitent

[Tom Goldman]

The sealing rings on the center support are for the direct clutches and the sprag lube circuit ....they dont affect 2nd gear. ...... .the intermediate brake clutches in the case are actuated thru the center support anchor bolt....400's have been prone to sealing ring issues at the center support for years . ....some prefer teflon tings, others hard chromed iron rings. both work well when the drum stays off the ring lands ......ATI has a modified support with a floating bearing machined between the ring lands that helps support the weight of the direct drum, and keeps it from dragging on the ring lands ,which is really important with a stock iron drum at high rpm.,altho you really should have an aluminum direct drum for your application. ......Tom