GMC T Series 1994 Repair Manual page 654

649B
649A
648
646
600 ^
621
ILL.
NO. DESCRIPTION
600 SPRING ASM., 3-4 CLUTCH BOOST (5)
621 HOUSING AND SHAFT ASSEMBLY, INPUT
646 PLATE, FORWARD CLUTCH (APPLY)
648 PLATE, FORWARD CLUTCH (WAVED)
PLATE ASSEMBLY, FORWARD CLUTCH (STEEL)
649A
649B
PLATE, FORWARD CLUTCH (FIBER)
650 PLATE, FORWARD CLUTCH BACKING (SEL.)
651 RING, FORWARD CLUTCH BACKING PLATE RETAINER
653 PLATE, 3RD AND 4TH CLUTCH APPLY (STEPPED)
654A PLATE ASSEMBLY, 3RD AND 4TH CLUTCH (FIBER)
654B PLATE, 3RD AND 4TH CLUTCH (STEEL)
655 PLATE, 3RD AND 4TH CLUTCH BACKING (SEL.)
RING, 3RD AND 4TH CLUTCH BACKING PLATE
656
RETAINER
Figure 70 Input Housing w ith Forward and 3-4 Clutch
Plates
H^t-I Assemble
Figures 69 through
1.
2
.
3.
4.
5.
Forward Clutch Piston Travel Check
Figure
1
.
2
.
3.
APPLY PLATE
WAVED STEEL
CLUTCH PLATE
FLAT STEEL
CLUTCH PLATE
COMPOSITION
FACED CLUTCH
PLATES
BACKING PLATE
RH0165-4L60-E-R1
The 3-4 clutch apply plate (653) for:
- Flatness.
- Bent tangs.
- Surface finish damage.
72
Forward clutch apply plate (646) into the input
clutch housing.
• Index as shown.
Waved steel forward clutch plate (648) into the
input clutch housing.
• Index as shown.
The remaining forward clutch plates (649) into
the input clutch housing.
• Start with a steel plate and alternate with
composition.
Forward clutch selective backing plate (650).
Forward clutch retaining ring (651).
72
Measure
With the overrun clutch and forward clutch fully
assembled in the Input Housing, check the end
clearance between the backing plate (650) and
the retaining ring (651) with two feeler gages.
Proper forward clutch backing plate travel
should be 0.75 to 1.60 mm (0.030 to 0.063
inch).
Select the proper backing plate from the chart
to obtain the correct clearance.
FORWARD CLUTCH INFORMATION CHART
THICKNESS
PLATE TYPE
4.30mm
(.169")
1.79mm
(.070")
2.29mm
(.090")
1.78mm
(0.70")
SELECTIVE
QUANTITY REQUIRED
ALL MODELS
1
1
5
5
1
RH0166-4L60-E