Nash Overdrives were produced with two types of clutches or frictions.
Corvettes with overdrives built in 1983 to late 1985 had solid frictions.
Units manufactured for 1986 to 1988 had "waffled" frictions. Early overdrives
had 5 direct and 4 overdrive solid frictions. Late overdrives had 6 direct
and 5 overdrive waffled frictions. Apparently the engineers felt that
by adding the oil grooves it would improve clutch life. The added oil
grooves or waffles may have improved lube to the clutches but it reduced
surface area or holding power by 14 percent. They added an extra clutch
for direct and overdrive to compensate for the loss or surface area.
that the older units never burned up unless a mechanical problem caused
excessive clearance and allowed the clutches to loose their stack height.
We recommend building the units with the later amount of clutches but
with the older style. This yields maximum holding power and high reliability.
We stock older style solid frictions which are no longer available from
Direct Solid No. Is: 14081192
Direct Waffled No. Is: 14105930
Overdrive Solid is Not Available
Overdrive Waffled No. Is: 14105933
Home Page ] [ Overdrive