Workshop

HYDRA – MATIC 4L40 – E / 5L40 – E

AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
62
COMPONENT REBUILD
FORWARD AND COAST CLUTCH HOUSING (CONT'D)
Figure 92
Figure 91
COMPLETED COAST CLUTCH HOUSING
24. Install the "Selective" apply plate on top of the
wave plate, as shown in Figure 90.
Note: The "Selective" apply plate usually
has a number stamped on it for I.D.
25. The coast clutch housing is now complete and
should look like the illustration in Figure 91.
26. We are now ready to check for proper coast
clutch clearance. This is where we will need
the pre-recorded dimensions.
27. Measure the distance from the top of the coast
clutch housing to the top of the coast clutch
apply plate, as shown in Figure 92.
Notice: Record this as dimension "D".
28. Subtract pre-recorded dimension "A" from
dimension "D". This is the coast clutch pack
travel, and travel shoud be as follows:
0.77 mm (.030") to 1.67 mm (.060").
EXAMPLE:
Dimension "B" = 2.504"
Dimension "C" = 2.375"
Subtract dimension "C" from dimension "B"
and this = dimension "A".
Dimension "A" = 0.129"
Dimension "D" = 0.170"
Subtract dimension "A" from dimension "D"
and this = clutch pack travel.
Clutch travel in this example is 0.041".
29. Change the "Selective" coast clutch apply plate
as necessary to obtain proper clearance.
30. Holding the completed coast clutch housing in
your left hand and grasping the turbine shaft
with your right hand, as shown in Figure 93,
index and install the coast clutch housing up
into the forward clutch housing, all the way.
31. While holding it in position, turn the assembly
over and place it back on the foot press as
shown in Figure 94.
32. Install the forward clutch "Wave" plate on top
of the coast clutch housing (See Figure 94).
4321
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
5 6
10 20 30 40 50 60 70 80 90 150140130120110100
0
in
mm
ELECTRONIC
DIGITAL CALIPER
AUTO POWER-OFFAUTO POWER-OFF
mm/inmm/in 00
00.170
IN
"D"
CALCULATING COAST CLUTCH CLEARANCE
Continued on Page 64

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