2006 DODGE RAM SRT-10 Service Repair Manual

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Page 3785 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL)
1.
1. Inspect the vehicle to ensure that all engine and transmission components are properly installed and connected.
Reassemble and reconnect component

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DODGE RAM SRT-10 2006 Service Repair Manual PRE-DIAGNOSTIC CHECKOUT (DIESEL)
For a complete wiring diagramRefer to Section 8W
1.PRE-DIAGNOSTIC CHECKOUT
NOTE: Always perform diagnostics with a fully charged battery to avoid false symptoms.
NOTE:

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DODGE RAM SRT-10 2006 Service Repair Manual page page
AUTOMATIC TRANSMISSION - 48RE - SERVICE
INFORMATION
DESCRIPTION ............................. 1268
OPERATION ............................... 1271
DIAGNOSIS AND TESTING
AUTOMATIC TRANSMISSION

page page
AUTOMATIC TRANSMISSION - 48RE - SERVICE
INFORMATION
DESCRIPTION ............................. 1268
OPERATION ............................... 1271
DIAGNOSIS AND TESTING
AUTOMATIC TRANSMISSION .............. 1277
PRELIMINARY ............................ 1277
ROAD TESTING .......................... 1277
HYDRAULIC PRESSURE TEST . ........... 1278
AIR TESTING TRANSMISSION CLUTCH
AND BAND OPERATION................... 1281
CONVERTER HOUSING FLUID LEAK ...... 1282
DIAGNOSIS CHARTS ..................... 1283
STANDARD PROCEDURE - ALUMINUM
THREAD REPAIR ......................... 1293
REMOVAL ................................. 1294
DISASSEMBLY ............................. 1298
CLEANING ................................. 1306
INSPECTION ............................... 1306
ASSEMBLY . ............................... 1307
INSTALLATION ............................. 1317
SCHEMATICS AND DIAGRAMS
HYDRAULIC SCHEMATICS ................ 1322
SPECIFICATIONS
TRANSMISSION .......................... 1336
SPECIAL TOOLS
RE TRANSMISSION ...................... 1339
ACCUMULATOR
DESCRIPTION ............................. 1341
OPERATION ............................... 1342
INSPECTION ............................... 1342
BANDS
DESCRIPTION ............................. 1343
OPERATION ............................... 1343
ADJUSTMENTS
ADJUSTMENT - BANDS ................... 1344
SYSTEM-BRAKE TRANSMISSION SHIFT
INTERLOCK
DESCRIPTION ............................. 1345
OPERATION ............................... 1345
DIAGNOSIS AND TESTING - BRAKE
TRANSMISSION SHIFT INTERLOCK ........ 1345
ADJUSTMENTS - BRAKE TRANSMISSION
SHIFT INTERLOCK ....................... 1345
GOVERNOR-ELECTRONIC
DESCRIPTION ............................. 1347
OPERATION ............................... 1348
REMOVAL ................................. 1349
INSTALLATION ............................. 1350SEAL-EXTENSION HOUSING
REMOVAL ................................. 1352
INSTALLATION ............................. 1352
FLUID AND FILTER
DIAGNOSIS AND TESTING
EFFECTS OF INCORRECT FLUID LEVEL . . . 1353
CAUSES OF BURNT FLUID ............... 1353
FLUID CONTAMINATION .................. 1353
STANDARD PROCEDURE
FLUID LEVEL CHECK ..................... 1353
FLUID AND FILTER REPLACEMENT ....... 1355
TRANSMISSION FILL ..................... 1357
CLUTCH-FRONT
DESCRIPTION ............................. 1358
OPERATION ............................... 1358
DISASSEMBLY . ............................ 1359
INSPECTION............................... 1360
ASSEMBLY................................ 1360
SERVO-FRONT
DESCRIPTION ............................. 1363
OPERATION ............................... 1363
DISASSEMBLY . ............................ 1364
CLEANING ................................. 1364
INSPECTION ............................... 1365
ASSEMBLY................................ 1365
CABLE-GEARSHIFT
DIAGNOSIS AND TESTING - GEARSHIFT
CABLE ................................... 1366
REMOVAL ................................. 1366
INSTALLATION ............................. 1367
ADJUSTMENTS - GEARSHIFT CABLE ........ 1368
PUMP-OIL
DESCRIPTION ............................. 1369
OPERATION ............................... 1369
DISASSEMBLY ............................. 1370
CLEANING ................................. 1371
INSPECTION ............................... 1371
ASSEMBLY................................ 1373
BEARING-OUTPUT SHAFT FRONT
REMOVAL ................................. 1375
INSTALLATION ............................. 1375
BEARING-OUTPUT SHAFT REAR
REMOVAL ................................. 1376
INSTALLATION ............................. 1376
CLUTCH-OVERDRIVE
DESCRIPTION ............................. 1377
OPERATION ............................... 1377
UNIT-OVERDRIVE
REMOVAL ................................. 1378
DISASSEMBLY ............................. 1379

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DODGE RAM SRT-10 2006 Service Repair Manual CLEANING ................................. 1389
INSPECTION ............................... 1389
ASSEMBLY . ............................... 1390
INSTALLATION ............................. 1400
RETAINER

CLEANING ................................. 1389
INSPECTION ............................... 1389
ASSEMBLY . ............................... 1390
INSTALLATION ............................. 1400
RETAINER-OVERRUNNING CLUTCH CAM/
OVERDRIVE PISTON
DESCRIPTION ............................. 1402
OPERATION ............................... 1402
DISASSEMBLY ............................. 1402
CLEANING ................................. 1403
INSPECTION ............................... 1403
ASSEMBLY . ............................... 1403
SHAFT-PLANETARY GEARTRAIN/OUTPUT
DESCRIPTION ............................. 1407
OPERATION ............................... 1407
DISASSEMBLY ............................. 1407
INSPECTION ............................... 1410
ASSEMBLY ................................ 1410
CLUTCH-REAR
DESCRIPTION ............................. 1416
OPERATION ............................... 1416
DISASSEMBLY ............................. 1417
CLEANING ................................. 1417
INSPECTION ............................... 1418
ASSEMBLY ................................ 1418
SERVO-REAR
DESCRIPTION ............................. 1421
OPERATION ............................... 1421
DISASSEMBLY ............................. 1421
CLEANING ................................. 1421
ASSEMBLY ................................ 1421
MECHANISM-SHIFT
DESCRIPTION ............................. 1422
OPERATION ............................... 1422
SENSOR-SPEED
DESCRIPTION ............................. 1423
OPERATION ............................... 1423
ACTUATOR-THROTTLE VALVE
DESCRIPTION ............................. 1424
REMOVAL ................................. 1424
INSTALLATION ............................. 1425
ADJUSTMENTS
ADJUSTMENT ............................ 1426
CABLE-THROTTLE VALVE
DESCRIPTION ............................. 1427ADJUSTMENTS - THROTTLE VALVE CABLE . . 1428
CONVERTER-TORQUE
DESCRIPTION ............................. 1431
OPERATION ............................... 1435
REMOVAL ................................. 1436
INSTALLATION ............................. 1437
VALVE-TORQUE CONVERTER DRAINBACK
DESCRIPTION
GAS ENGINES ........................... 1438
DIESEL ENGINE .......................... 1438
OPERATION
GAS ENGINES ........................... 1438
DIESEL ENGINE .......................... 1438
STANDARD PROCEDURE
GAS ENGINES ........................... 1438
DIESEL ENGINE .......................... 1438
SWITCH-TOW/HAUL OVERDRIVE
DESCRIPTION ............................. 1440
OPERATION ............................... 1440
DIAGNOSIS AND TESTING - OVERDRIVE
ELECTRICAL CONTROLS ................. 1440
REMOVAL ................................. 1440
INSTALLATION ............................. 1441
SENSOR-TRANSMISSION RANGE
DESCRIPTION ............................. 1442
OPERATION ............................... 1442
DIAGNOSIS AND TESTING - TRANSMISSION
RANGE SENSOR (TRS) ................... 1443
REMOVAL ................................. 1444
INSTALLATION ............................. 1445
SENSOR-TRANSMISSION TEMPERATURE
DESCRIPTION ............................. 1447
OPERATION ............................... 1447
BODY-VALVE
DESCRIPTION ............................. 1448
OPERATION ............................... 1451
REMOVAL ................................. 1471
DISASSEMBLY ............................. 1472
CLEANING ................................. 1485
INSPECTION ............................... 1485
ASSEMBLY................................ 1486
INSTALLATION ............................. 1497
ADJUSTMENTS - VALVE BODY .............. 1498

Page 3789 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual AUTOMATIC TRANSMISSION - 48RE - SERVICE INFORMATION
DESCRIPTION

Page 3790 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 48RE Transmission

Page 3791 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual The 48RE is a four speed fully automatic transmissions with an electronic governor. The 48RE is equipped with a
lock-up clutch in the torque converter. First through third gear ranges are provided by

The 48RE is a four speed fully automatic transmissions with an electronic governor. The 48RE is equipped with a
lock-up clutch in the torque converter. First through third gear ranges are provided by the clutches, bands, over-
running clutch, and planetary gear sets in the transmission. Fourth gear range is provided by the overdrive unit that
contains an overdrive clutch, direct clutch, planetary gear set, and overrunning clutch.
The transmission contains a front, rear, and direct clutch which functionas the input driving components. It also
contains the kickdown (front) and the low/reverse (rear) bands which, along with the overrunning clutch and over-
drive clutch, serve as the holding components. The driving and holding components combine to select the neces-
sary planetary gear components, in the front, rear, or overdrive planetary gear set, transfer the engine power from
the input shaft through to the output shaft.
The valve body is mounted to the lower side of the transmission and containsthe valves to control pressure reg-
ulation, fluid flow control, and clutch/band application. The oil pump ismounted at the front of the transmission and
is driven by the torque converter hub. The pump supplies the oil pressure necessary for clutch/band actuation and
transmission lubrication.
IDENTIFICATION
Transmission identification numbers (1) are stamped
on the left side of the case just above the oil pan gas-
ket surface. Refer to this information when ordering
replacement parts.
GEAR RATIOS
The 48RE gear ratios are:
.............................................................................. 2.45:1
............................................................................. 1.45:1
.............................................................................. 1.00:1
.............................................................................. 0.69:1
............................................................................. 2.20:1
1 - TORQUE CONVERTER 10 - OVERDRIVE CLUTCH
2 - INPUT SHAFT 11 - DIRECT CLUTCH
3 - OIL PUMP 12 - PLANETARY GEAR
4 - FRONT BAND 13 - INTERMEDIATE SHAFT
5 - FRONT CLUTCH 14 - OVERDRIVE OVERRUNNING CLUTCH
6 - REAR CLUTCH 15 - DIRECT CLUTCH SPRING
7 - PLANETARIES 16 - OVERDRIVE PISTON RETAINER
8 - REAR BAND 17 - OIL PAN
9 - OVERRUNNING CLUTCH 18 - VALVE BODY

Page 3792 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual OPERATION
The application of each driving or holding component is controlled by the valve body based upon the manual lever
position, throttle pressure, and governor pressure. The governor pressure is

OPERATION
The application of each driving or holding component is controlled by the valve body based upon the manual lever
position, throttle pressure, and governor pressure. The governor pressure is a variable pressure input to the valve
body and is one of the signals that a shift is necessary. First through fourth gear are obtained by selectively apply-
ing and releasing the different clutches and bands. Engine power is thereby routed to the various planetary gear
assemblies which combine with the overrunning clutch assemblies to generate the different gear ratios. The torque
converter clutch is hydraulically applied and is released when fluid is vented from the hydraulic circuit by the torque
converter control (TCC) solenoid on the valve body. The torque converter clutch is controlled by the Powertrain
Control Module (PCM). The torque converter clutch engages in fourth gear,and in third gear under various condi-
tions, such as when the O/D switch is OFF, when the vehicle is cruising on a level surface after the vehicle has
warmed up. The torque converter clutch can also be engaged in the MANUAL SECOND gear position if high trans-
mission temperatures are sensed by the PCM. The torque converter clutch will disengage momentarily when an
increase in engine load is sensed by the PCM, such as when the vehicle beginsto go uphill or the throttle pressure
is increased. The torque converter clutch feature increases fuel economyand reduces the transmission fluid tem-
perature.
Since the overdrive clutch is applied in fourth gear only and the direct clutch is applied in all ranges except fourth
gear, the transmission operation for park, neutral, and first through third gear will be described first. Once these
powerflows are described, the third to fourth shift sequence will be described.
PARK POWERFLOW
As the engine is running and the crankshaft is rotat-
ing, the flexplate and torque converter, which are also
bolted to it, are all rotating in a clockwise direction as
viewed from the front of the engine. The notched hub
of the torque converter is connected to the oil pump’s
internal gear, supplying the transmission with oil pres-
sure. As the converter turns, it turns the input shaft in
a clockwise direction. As the input shaft is rotating, the
front clutch hub-rear clutch retainer and all their asso-
ciated parts are also rotating, all being directly con-
nected to the input shaft. The power flow from the
engine through the front clutch hub and rear clutch
retainer stops at the rear clutch retainer. Therefore, no
power flow to the output shaft occurs because no
clutches are applied. The only mechanism in use at
this time is the parking sprag (1), which locks the
parking gear (2) on the output shaft (3) to the trans-
mission case.

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