Workshop

HYDRA-MATIC 6L80 (6 Speed)

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436 4-5-6 CLUTCH BALANCE PISTON SNAP RING
437 4-5-6 CLUTCH BALANCE PISTON
438 4-5-6 CLUTCH APPLY PISTON "BELLVILLE" RETURN SPRING
439 4-5-6 CLUTCH APPLY PISTON
440 4-5-6 CLUTCH HOUSING BUSHING (OUTPUT SHAFT)
441 4-5-6 CLUTCH HOUSING ASSEMBLY
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
50
Copyright © 2007 ATSG
COMPONET REBUILD
4-5-6 CLUTCH HOUSING ASSEMBLY
1. Disassemble the 4-5-6 clutch housing using
Figure 76 as a guide.
Note: Use care when compressing the return
spring. Compressing the balance piston too
far may create damage to the piston.
2. Remove and discard the 4-5-6 clutch balance
piston snap ring.
3. Clean all 4-5-6 clutch housing parts thoroughly
and dry with compressed air.
4. Inspect all 4-5-6 clutch housing parts for any
wear and/or damage.
5. Replace the 4-5-6 clutch housing bushing as
necessary (See Figure 77)
6. Lubricate a new 4-5-6 clutch piston with small
amount of Trans-Jel® on both seal surfaces and
install it into housing as shown in Figure 77,
using a twisting motion.
7. Install the 4-5-6 clutch apply piston "bellville"
type return spring, as shown in Figure 77, with
the fingers facing up.
8. Lubricate a new 4-5-6 clutch balance piston
with a small amount of Trans-Jel® on both of
the seal surfaces and install into apply piston,
as shown in Figure 77, with a twisting motion.
9. Compress the balance piston and return spring
and install a new snap ring.
Note: Use care when compressing the return
spring. Compressing the balance piston too
far may create damage to the piston.
10. Remove the spring compressor.
Special Note: ATSG recommends replacing
all of the molded pistons, regardless of their
condition.
Figure 77
Continued on Page 51
Special Note: ATSG recommends pre-soaking
the clutch pack friction plates in Dexron VI®
for at least 30 minutes before assembly. This
includes "All" clutch packs in this unit.

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