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Low (Manual) Closed Throttle
RSAUTOMATIC - 31TH21-69
AUTOMATIC - 31TH (Continued)
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Reverse
21 - 70 AUTOMATIC - 31THRS
AUTOMATIC - 31TH (Continued)
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SPECIFICATIONS
31TH AUTOMATIC TRANSAXLE
GENERAL SPECIFICATIONS
Transaxle TypeThree speed automatic with torque converter and
integral differential
Cooling Method Air to oil heat exchanger
Lubrication Method Pump (internal-external gear-type)
GEAR RATIOS
1st Gear 2.69
2nd Gear 1.55
3rd Gear 1.00
Reverse Gear 2.10
BAND ADJUSTMENT
Kickdown (Front)ÐBacked Off From 8 N²m (72 in. lbs.) 2ò turns
Low-Reverse (Rear)ÐBacked Off From 5 N²m (41 in.
lbs.)3 Turns
BEARING SETTINGS (END PLAY & TURNING TORQUE)
Description Metric Standard
Differential Assembly 0.7-1.4 N´m 6-12 in. lbs.
Output Shaft 0-0.3 N´m 0-3 in. lbs.
Transfer Shaft 0.051-0.254 mm 0.002-0.010 in. (end play)
Overall Drag At Output Hub 0.03-1.8 N´m 3-16 in. lbs.
CLUTCH CLEARANCES
Description Metric Standard
Front Clutch (Not Adjustable) 1.27-2.79 mm 0.050-0.110 in.
Rear Clutch 0.71-1.10 mm 0.028-0.043 in.
END PLAY
Description Metric Standard
Input Shaft 0.19-1.50 mm 0.008-0.060 in.
Front Clutch Retainer 0.76-2.69 mm 0.030-0.106 in.
Front Carrier 0.89-1.45 mm 0.007-0.057 in.
Front Annulus Gear 0.09-0.50 mm 0.0035-0.020 in.
Planet Pinion 0.15-0.59 mm 0.006-0.023 in.
Reverse Drum 0.76-3.36 mm 0.030-0.132 in.
RSAUTOMATIC - 31TH21-71
AUTOMATIC - 31TH (Continued)
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OIL PUMP CLEARANCE
Description Metric Standard
Outer Gear-to-Pocket 0.045-0.141mm 0.0018-0.0056 in.
Outer Gear Side Clearance 0.020-0.046mm 0.0008-0.0018 in.
Inner Gear Side Clearance 0.020-0.046mm 0.0008-0.0018 in.
THRUST WASHERS
Description Metric Standard
Reaction Shaft Support (No. 1) 1.55-1.60 mm 0.061-0.063 in.
Rear Clutch Retainer (No. 2) 1.55-1.60 mm 0.061-0.063 in.
Output Shaft (No. 3) (Select) 1.98-2.03 mm 0.077-0.080 in
Output Shaft (No. 3) (Select) 2.15-2.22 mm 0.085-0.087 in.
Output Shaft (No. 3) (Select) 2.34-2.41 mm 0.092-0.095 in.
Front Annulus (No. 4) 2.95-3.05 mm 0.116-0.120 in.
Front Carrier (Nos. 5&6) 1.22-1.28 mm 0.0948-0.050 in.
Sun Gear-Front (No. 7) 0.85-0.91 mm 0.033-0.036 in
Sun Gear-Rear (No. 8) 0.85-0.91 mm 0.033-0.036 in.
Rear Carrier (Nos. 9&10) 1.22-1.28 mm 0.0948-0.050 in.
Rev. Drum (No. 11) 1.55-1.60 mm 0.061-0.063 in.
TORQUE SPECIFICATIONS
Description N´m Ft. Lbs. In. Lbs.
Bolt, Differential Bearing
Retainer-to-Case34 Ð 300
Bolt, Differential
Cover-to-Case19 Ð 165
Bolt, Differential Ring
Gear-to-Case95 70 Ð
Bolt, Extension Housing-
to-Case28 Ð 250
Bolt, Drive Plate-to-
Crankshaft95 70 Ð
Bolt, Drive Plate-to-Torque
Converter68 50 Ð
Bolt, Governor-to-Support 7 Ð 60
Bolt, Output Gear Strap 23 17 Ð
Bolt, Oil Pan-to-Case 19 Ð 165
Bolt, Oil Pump-to-Case 31 Ð 275
Bolt, Park Rod Support-to-
Case28 Ð 250
Bolt, Reaction Support-to-
Pump Body28 Ð 250
Bolt, Sprag Retainer-to-
Case28 Ð 250
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AUTOMATIC - 31TH (Continued)
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Description N´m Ft. Lbs. In. Lbs.
Bolt, Starter Motor-to-
Transaxle54 40 Ð
Bolt, Transaxle Case-to-
Engine Block95 70 Ð
Bolt, Transfer Gear
Cover-to-Case19 Ð 165
Bolt, Transfer Gear Strap 23 17 Ð
Bolt, Valve Body-to-Case 12 Ð 105
Fitting, Transaxle Oil
Cooler-to-Case7Ð60
Screw, Fluid Filter 5 Ð 45
Screw, Cooler Bypass
Valve-to-Transfer Plate5Ð40
Screw, Governor
Counterweight28 Ð 250
Screw, Manual Valve
Lever-to-Shaft12 Ð 105
Screw, Speedo Adapter-
to-Extension Housing7Ð60
Screw, Valve Body-to-
Transfer Plate5Ð45
Nut, Kickdown Band
Adjuster Lock47 35 Ð
Nut, Output Gear-to-Shaft 271 200 Ð
Nut, Reverse Band
Adjuster Lock14 Ð 125
Nut, Transfer Gear-to-
Shaft271 200 Ð
Plug, Pressure Tap 5 Ð 45
Plug, Rear Band Lever
Pivot Shaft7Ð60
Switch, Park/Neutral 34 25 Ð
RSAUTOMATIC - 31TH21-73
AUTOMATIC - 31TH (Continued)
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SPECIAL TOOLS
31TH AUTOMATIC TRANSAXLE
Adapter Blocks C-293±45
Adapter Blocks C-293±52
Puller Press C-293±PA
Pressure Gauge (High) C-3293SP
Dial Indicator C-3339
Spring Compressor C-3575-A
Band Adjusting Adapter C-3705
Oil Pump Puller C-3752
Throttle Setting Gauge C-3763
Seal Puller C-3981B
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AUTOMATIC - 31TH (Continued)
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Universal Handle C-4171
Seal Installer C-4193A
Bearing Installer C-4637
Adapter C-4658
Torque Tool C-4995
Adapter C-4996
Remover Kit L-4406
Bearing Remover Cup L-4406±1
Bearing Remover Jaws L-4406±2
RSAUTOMATIC - 31TH21-75
AUTOMATIC - 31TH (Continued)
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Adapter L-4406±3
Gear Puller L-4407A
Puller L-4407±6
Bearing Installer L-4408
Bearing Installer L-4410
Bearing Installer L-4411
Installer Adapter L-4429-3
Gear Checking Plate L-4432
Gear Removing Plate L-4434
Bearing Puller L-4435
21 - 76 AUTOMATIC - 31THRS
AUTOMATIC - 31TH (Continued)