Automatic Transmission Unit: Inspection: Inspection
- INSPECT AUTOMATIC TRANSMISSION OIL PAN SUB-ASSEMBLY
- Remove the magnets, and use them to collect steel particles.
- Carefully look at the foreign matter and particles in the pan and on the magnets to anticipate the type of wear you will find in the transmission.
- Steel (magnetic): bearing, gear and clutch plate wear
- Brass (non-magnetic): bush wear
- INSPECT NO. 2 1-WAY CLUTCH ASSEMBLY
- Hold the reverse clutch hub and turn the 1-way clutch assembly. Check that the 1-way clutch turns freely clockwise and locks when turned counterclockwise.
- INSPECT REAR CLUTCH DISC
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves have even a little bit of damage.NOTE:
Before assembling new discs, soak them in ATF for at least 2 hours.
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves have even a little bit of damage.
- INSPECT REVERSE CLUTCH HUB SUB-ASSEMBLY
- Using a dial indicator, measure the inside diameter of the reverse clutch hub bush.
Standard inside diameter
41.912 to 41.937 mm (1.410 to 1.411 in.)
- If the inside diameter is more than the standard, replace the reverse clutch hub.
- Using a dial indicator, measure the inside diameter of the reverse clutch hub bush.
- INSPECT FORWARD CLUTCH HUB SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a dial indicator, measure the inside diameter of the forward clutch hub bush.
Standard inside diameter
30.200 to 30.225 mm (1.189 to 1.190 in.)
- If the inside diameter is more than the standard, replace the forward clutch hub.
- Using a dial indicator, measure the inside diameter of the forward clutch hub bush.
- INSPECT NO. 4 1-WAY CLUTCH ASSEMBLY
- Hold the coast clutch hub and turn the 1-way clutch assembly. Check that the 1-way clutch turns freely clockwise and locks when turned counterclockwise.
- INSPECT FORWARD MULTIPLE DISC CLUTCH DISC
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.NOTE:
Before assembling new discs, soak them in ATF for at least 2 hours.
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.
- INSPECT COAST CLUTCH DISC
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.NOTE:
Before assembling new discs, soak them in ATF for at least 2 hours.
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.
- INSPECT FORWARD CLUTCH RETURN SPRING SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
Standard free length
29.65 mm (1.17 in.)
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
- INSPECT DIRECT CLUTCH DISC
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.NOTE:
Before assembling new discs, soak them in ATF for at least 2 hours.
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.
- INSPECT REVERSE CLUTCH RETURN SPRING SUB-ASSEMBLY Fig 11: Measuring Free Length Of Reverse Clutch Return Spring Together With Spring Seat Using Vernier Caliper
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
Standard free length
21.24 mm (0.836 in.)
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
- INSPECT DIRECT CLUTCH RETURN SPRING SUB-ASSEMBLY Fig 12: Measuring Free Length Of Direct Clutch Return Spring Together With Spring Seat Using Vernier Caliper
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
Standard free length
19.46 mm (0.766 in.)
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
- INSPECT NO. 3 BRAKE DISC
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.NOTE:
Before assembling new discs, soak them in ATF for at least 2 hours.
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.
- INSPECT NO. 3 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
Standard free length
15.72 mm (0.619 in.)
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
- INSPECT FRONT PLANETARY GEAR ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a feeler gauge, measure the front planetary pinion gear thrust clearance.
Standard clearance
0.2 to 0.6 mm (0.00787 to 0.0236 in.)
- If the clearance is more than the standard, replace the front planetary gear assembly.
- Using a cylinder gauge, measure the inside diameter of the front planetary gear bush.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard inside diameter
61.005 to 61.030 mm (2.402 to 2.403 in.)
- If the inside diameter is more than the standard, replace the front planetary gear.
- Using a feeler gauge, measure the front planetary pinion gear thrust clearance.
- INSPECT 1-WAY CLUTCH ASSEMBLY
- Install the 1-way clutch to the 1-way clutch inner race.
- Hold the 1-way clutch inner race and turn the 1-way clutch. Check that the 1-way clutch turns freely counterclockwise and locks when turned clockwise.
- Remove the 1-way clutch from the 1-way clutch inner race.
- INSPECT NO. 1 BRAKE DISC
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.NOTE:
Before assembling new discs, soak them in ATF for at least 2 hours.
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.
- INSPECT BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
Standard free length
17.05 mm (0.671 in.)
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
- INSPECT NO. 2 BRAKE DISC
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.NOTE:
Before assembling new discs, soak them in ATF for at least 2 hours.
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.
- INSPECT NO. 2 BRAKE PISTON RETURN SPRING SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
Standard free length
22.66 mm (0.892 in.)
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
- INSPECT CENTER PLANETARY GEAR ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a feeler gauge, measure the center planetary pinion gear thrust clearance.
Standard clearance
0.20 to 0.60 mm (0.00787 to 0.0236 in.)
- If the clearance is more than the standard, replace the center planetary gear assembly.
- Using a feeler gauge, measure the center planetary pinion gear thrust clearance.
- INSPECT NO. 3 1-WAY CLUTCH ASSEMBLY
- Hold the rear planetary ring gear flange and turn the 1-way clutch. Check that the 1-way clutch turns freely counterclockwise and locks when turned clockwise.
- INSPECT INTERMEDIATE SHAFT
- Using a dial indicator, check the intermediate shaft runout.
Standard runout
0.03 mm (0.00118 in.)
If the runout is more than the standard, replace the intermediate shaft with a new one.
- Using a micrometer, check the diameter of the intermediate shaft at the positions shown in the diagram.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard diameter
A
19.963 to 19.976 mm (0.7859 to 0.7865 in.)
B, C
30.150 to 30.163 mm (1.187 to 1.188 in.)
D, E
36.404 to 36.420 mm (1.433 to 1.434 in.)
If the diameter is less than the standard, replace the intermediate shaft with a new one.
- Using a dial indicator, check the intermediate shaft runout.
- INSPECT NO. 4 BRAKE DISC
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.
NOTE:
Before assembling new discs, soak them in ATF for at least 2 hours.
- Replace all discs if one of the following problems is present: 1) a disc, plate or flange is worn or burnt, 2) the lining of a disc is peeled off or discolored, or 3) grooves or printed numbers have even a little bit of damage.
- INSPECT REAR PLANETARY GEAR ASSEMBLY
- Using a feeler gauge, measure the rear planetary pinion gear thrust clearance.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard clearance
0.2 to 0.6 mm (0.00787 to 0.0236 in.)
- If the clearance is more than the standard, replace the planetary gear assembly.
- Using a dial indicator, measure the inside diameter of the rear planetary gear bush.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard inside diameter
20.0 to 20.025 mm (0.787 to 0.788 in.)
- If the inside diameter is more than the standard, replace the rear planetary gear assembly.
- Using a feeler gauge, measure the rear planetary pinion gear thrust clearance.
- INSPECT 1ST AND REVERSE BRAKE RETURN SPRING SUB-ASSEMBLY
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
Standard free length
23.54 to 23.94 mm (0.927 to 0.943 in.)
- Using a vernier caliper, measure the free length of the spring together with the spring seat.
- INSPECT INDIVIDUAL PISTON OPERATION
- Check the operating sound while applying compressed air into the oil holes indicated in the illustration.
HINT:
When inspecting the direct clutch, check with the accumulator piston holes indicated in the illustration.
If there is no sound, disassemble and check the installation condition of the parts.
- No. 2 clutch (C2)
- No. 3 clutch (C3)
- No. 4 clutch (C4)
- No. 1 clutch (C1)
- No. 3 brake (B3)
- No. 1 brake (B1)
- No. 2 brake (B2)
- No. 4 brake (B4)
- Check the operating sound while applying compressed air into the oil holes indicated in the illustration.