1999 and Previous 4L60/4L60E (700R4). The reverse input clutch piston
assembly on the 4L60 and the 4L60E utilize an outer lip as well as an
inner hub lip seal. This two piece is designed to protect the outer
seal and the inner seal from damage during assembly of the reverse
input clutch piston into the drum assembly. It has been determined that
damage to the seals could occur, if the piston seals are installed
using a typical wire seal installer. Place the outside seal protector
into the drum assembly. Then place the smaller cone seal protector over
the shaft inside the reverse input clutch piston. At this time
lubricate the seals, place the piston into the drum assembly and push
into place while rotating the piston.
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