Opel Frontera UBS. Service manual — part 2530
7A–78
AUTOMATIC TRANSMISSION (4L30–E)
Overrun Clutch And Turbine Shaft
Disassembled View
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Legend
(1) Snap Ring
(2) Overdrive Carrier Assembly
(3) Sun Gear
(4) Turbine Shaft
(5) Snap Ring
(6) Backing Plate
(7) Clutch Plates
(8) Snap Ring
(9) Overrun Roller Clutch Cam
(10) Roller Clutch Assembly
(11) Overrun Clutch Release Spring Retainer
(12) Diaphragm Spring
(13) Piston Assembly
(14) Overrun Clutch Drum
(15) Turbine Shaft Seal Rings
7A–79
AUTOMATIC TRANSMISSION (4L30–E)
Disassembly
1. Position overrun clutch assembly upright, using the
overdrive internal gear as a support.
D
Remove snap ring (1).
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2. Remove overdrive carrier assembly (2), sun gear (3)
and turbine shaft (4).
3. Remove snap ring (5), backing plate (6), and clutch
plates (7).
4. Compress diaphragm spring with the
5–8840–2275–0 (J–23327–91) compressor, then
remove snap ring (8).
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5. Remove overrun roller clutch cam (9) and roller clutch
assembly (10).
6. Remove overrun clutch release spring retainer (11)
and diaphragm spring (12).
7. Remove piston assembly (13) from overrun clutch
drum (14).
8. Remove turbine shaft seal rings (15).
Inspection And Repair
Overdrive Carrier Check
D
Check pinion end play with a feeler gauge.
Clearance: 0.24mm–0.64mm (0.0094in–0.025in)
If clearance is outside specified value, replace overdrive
carrier assembly.
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Visual Check:
If any damage, deformation or local wear is found,
replace the damaged part.
Reassembly
1. Install turbine shaft seal rings (15) with grease
(petroleum jelly).
241RS008
7A–80
AUTOMATIC TRANSMISSION (4L30–E)
2. Install the 5–8840–2269–0 (J–38555) inner installer
on the drum (14).
D
Pre–install piston assembly into 5–8840–2269–0
(J–38555) outer installer.
D
Install overrun clutch piston assembly (13). Use the
outer installer while pushing piston into drum (14).
D
Remove the installer.
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3. Install diaphragm spring (12).
4. Install overrun clutch release spring retainer (11) (lip
faces upwards), overrun roller clutch assembly (10),
and cam (9).
5. Place snap ring loosely on spring retainer.
D
Hold the 5–8840–2275–0 (J–23327–91)
compressor in a vise and compress piston return
spring with compressor.
D
Set snap ring (8) in ring groove.
D
Remove the compressor.
6. Install clutch plates (7), start with steel plate and
alternate with lined plates.
7. Install backing plate (6).
8. Install snap ring (5).
9. Install overdrive sun gear with countersink pointing
downwards.
10. Install the overdrive carrier assembly (2).
NOTE: Turn the assembly in a counter–clockwise
direction only until roller clutch enters the outer race.
After installation, rotate the assembly and listen for loose
rollers.
11. Install turbine shaft (4) and snap ring (1).
7A–81
AUTOMATIC TRANSMISSION (4L30–E)
Main Data And Specification
General Specifications
Remarks
Model
THM 4L30–E
Engine
V6 3.5L 6VE1
DOHC
Type
Automatic four speed overdrive in
4th gear lock–up clutch torque
converter
Shift control
Hydraulic
Control systems
Shift pattern
Electronic
Control systems
Shift quality
Electronic
Lock–up clutch
Electronic
1st
2.856
2nd
1.618
Gear ratio
3rd
1.000
4th (O/D)
0.723
Reverse
2.000
Gear set
Noiseless, high torque capability
Oil used
Name
ATF DEXRON
–III
Oil used
Q’ty liter (qt)
8.6 (9.1)
Torque converter
2,100
±
150
Stall speed (rpm)
Reverse clutch
RC
4
Second clutch
C2
6
Number of discs
Third clutch
C3
6
Number of discs
Brake band
Double wrap
Fourth clutch
C4
2
Number of discs
Overrun clutch
OC
1
Number of discs
Overdrive
OFW
10
Number of rollers
Principal
PFW
26
Number of sprags
Input sun gear
30
Pinion gear
19
Ravigneaux plan-
Long pinion
23
g
etary gear set
Ring gear
90
Long pinion
19
Number of teeth
Output sun gear
46
O
d i
l
Sun gear
31
Overdrive plane-
tary gear set
Pinion gear
24
tary gear set
Ring gear
81
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