Page 31 - Hydra-matic 6 Speed RWD Technician's Guide (October 2005)

APPLY COMPONENTS - 2-6 CLUTCH

2-6 CLUTCH RELEASE:
CENTER To release the 2-6 clutch, 2-6 clutch fluid exhausts through the center
SUPPORT support assembly and into the transmission case, allowing pressure at the
ASSEMBLY 2-6 clutch piston assembly (457) to decrease. In the absence of fluid
(459)
pressure, spring force from the 2-6 clutch spring (456) moves the piston
assembly (457) away from the clutch pack. This disengages the 2-6
clutch plates (452) and clutch plate assemblies (453) from the backing
plate (451), thereby allowing the 2-6 and 3-5 reverse clutch (w/output
carrier outer sun gear shaft) hub assembly (64) to rotate freely.

If the 2-6 apply fluid does not fully exhaust, the 2-6 clutch could partially
apply or drag. If the 2-6 clutch is inoperative, there will be no 2nd or 6th
gears.
2-6 CLUTCH:
The 2-6 clutch assembly is located in the center
support assembly (459). The center support 2-6 2-6 2-6 2-6
assembly is splined to the transmission case, and CLUTCH CLUTCH CLUTCH CLUTCH 2-6
secured by a large retaining ring (66). The external PLATE SPRING SPRING PISTON CLUTCH
AIR
teeth on the 2-6 clutch plates (453) are splined to 2-6 (453) RETAINING (456) ASSEMBLY BLEED
CLUTCH
the center support assembly while the internal teeth BACKING RING (457) (Orifice Cup Plug)
(455)
on the 2-6 clutch plate assemblies (452) are splined PLATE
to the 2-6 and 3-5 reverse clutch (w/output carrier RETAINING
outer sun gear shaft) hub assembly (64). The 2-6 RING
clutch is applied only when the transmission is in (450)
2nd or 6th gear.
2-6 CLUTCH APPLY:
To apply the 2-6 clutch, 2-6 clutch fluid is fed
through the transmission case into the center support
assembly (459). A feed hole in the center support
allows fluid to enter behind the 2-6 clutch piston
assembly (457). 2-6 clutch fluid pressure moves
the piston to compress the 2-6 clutch spring (456).
As fluid pressure increases, the 2-6 clutch (waved)
plate (454) compresses the clutch plates together
until they are held against the backing plate (451).
When fully applied, the 2-6 clutch (waved) plate
(454), clutch plates (452) and the 2-6 clutch plate
assemblies (453) are locked together, thereby
holding the center support assembly (459) and the
2-6 and 3-5 reverse clutch (w/output carrier outer
sun gear shaft) hub assembly (64) together. The
output carrier front sun gear (487) is splined to the
end of the 2-6 hub shaft and thus held stationary.

2-6 2-6 2-6 2-6
CLUTCH CLUTCH CLUTCH CLUTCH
BACKING PLATE (WAVED) APPLY
PLATE ASSEMBLY PLATE FLUID
(451) (452) (454)

450 451 452 453 454 455 456 457

22 Figure 22