Dodge Nitro. Manual — part 333

18. Disconnect the transmission vent hose from the transmission.

19. Remove transfer case.

20. Support rear of engine with safety stand or jack.

21. Raise transmission slightly with service jack to relieve load on crossmember and supports.

22. Remove bolts securing rear support and cushion (2) to transmission and crossmember (1). See Fig. 17.

23. Remove bolts attaching crossmember to frame and remove crossmember.

24. Disconnect transmission fluid cooler lines at transmission fittings and clips.

25. Remove all remaining converter housing bolts.

26. Carefully work transmission and torque converter assembly rearward off engine block dowels.

27. Hold torque converter in place during transmission removal.

28. Lower transmission and remove assembly from under the vehicle.

29. To remove torque converter, carefully slide torque converter out of the transmission.

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION 42RLE - Service Information - Nitro

DIAGNOSIS AND TESTING

NAG1

CONDITION

POSSIBLE CAUSES

CORRECTION

Harsh N-D Engagement or
Harsh N-R Engagement

1. Transmission adaptation/calibration.

1. Check for latest level TCM
software. Perform the TCM
adaptation procedure. Refer to
STANDARD PROCEDURE .

2. Transmission in limp-home mode.

2. Check TCM for DTCs. Repair
as needed.

3. Driveline lash/movement.

3. Check engine mounts,
transmission mount, driveshaft
couplings, rear crossmember
mounts, axle mounts and axle
lash.

4. Converter clutch or lock up control
valve malfunction.

4. Perform converter clutch
diagnostics test. Inspect valve
body for stuck or sticky lock up
control valve. If valve motion is
free, replace lock up solenoid and
retest.

5. Valve Body Malfunction.

5. Inspect valve body for stuck or
sticky regulator valve.

6. Clutch or planetary component
damage.

6. Remove, disassemble and
repair transmission as necessary.

7. Water in Trans.

7. Perform TSB, recommend to
split and clean VB if heavily
contaminated.

DELAYED N-D OR N-R

ENGAGEMENT

1. Transmission adaptation/calibration.

1. Check for latest level TCM
software. Perform the TCM
adaptation procedure. Refer to
STANDARD PROCEDURE .

2. Torque converter fluid drain back,
delayed soft engagement.

2. If vehicle moves normally after
3 seconds of shifting into gear, no
repair is necessary. If longer,
inspect pump for worn bushing.

3. Fluid Level Low.

3. Check and adjust fluid level.
See STANDARD
PROCEDURE.

4. Filter plugged.

4. Check TC out pressure, if <
10psi, check for plugged filter.
Replace if needed.

5. Filter damaged or missing, missing
o-ring.

5. Check for damaged/missing
filter or cut/missing o-ring.

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION NAG1 - Service Information - Nitro

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION NAG1 - Service Information - Nitro

6. Valve Body Malfunction.

6. Inspect valve body for
stuck/sticky regulator valve or
shift group valves.

7. Oil pump gears worn/damaged.

7. Inspect pump for damage or
excessive clearances. Replace if
needed.

NO DRIVE OR REVERSE

ENGAGEMENT (vehicle

will not move)

1. Misadjusted/damaged shift cable.

1. Inspect shift system. Adjust
and/or replace worn/damaged
parts.

2. Fluid level low.

2. Check and adjust fluid level.
See STANDARD
PROCEDURE.

3. Filter plugged.

3. Check TC out pressure, if <
10psi, check for plugged filter.
Replace if needed.

4. Filter damaged or missing, missing
filter o-ring.

4. Check for damaged/missing
filter or cut/missing o-ring.

5 Hydraulic system-Low/no line
pressure.

5. Remove Electrohydraulic Unit.
Inspect or sticky/stuck regulator
valve. If valve motion is free,
replace line pressure solenoid and
retest. If condition still exists
check for worn/damaged pump.
Replace pump assembly if
needed.

6. TCM in Limp Mode

6. Clear codes and reset.

7. Stuck Pressure Regulator Valve

7. Split Electrohydraulic Unit t
and inspect pressure regulator
valve. Remove debris if present.
Be certain all shift valves are free,
if any valve can't be freed replace
Electrohydraulic Unit.

8. Broken Weld at Front Annulus

8. Replace Hard Parts as
Necessary.

9. Broken Input Shaft Weld

9. Replace Hard Parts as
Necessary.

10. Defective T/C

10. Replace T/C, make sure filter
is not clogged.

11. Broken Output Shaft Weld

11. Replace parts as necessary

12. Broken/Missing Rear Annulus
Weld.

12. Replace parts as necessary.

13. Unseated Rear Annulus Gear snap
ring.

13. Properly install or replace
snap ring.

Split Electrohydraulic Unit and
inspect 3-4 command valve as

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION NAG1 - Service Information - Nitro

14. Valves not returned to their home
position.

well as all other valves, being
certain they move freely and are
free of debris.

SHUDDER GARAGE

SHIFT R-D OR D-R

1. Transmission adaptation/calibration.

1. Check for latest level TCM
software. Perform the TCM
adaptation procedure. Refer to
STANDARD PROCEDURE .

2. Customer applying throttle while
shift is in progress.

2. Instruct customer to wait until
shift is complete prior to applying
throttle.

HARSH ROLLING

GARAGE SHIFT R-D OR

D-R

1. Transmission adaptation/calibration.

1. Check for latest level TCM
software. Perform the TCM
adaptation procedure. Refer to
STANDARD PROCEDURE .

2. Customer shifting into desired range
with vehicle motion.

2. Instruct customer to only shift
into the desired range with the
vehicle stopped and the service
brake applied.

3. Transmission in limp-home mode.

3. Check TCM for DTCs. Repair
as needed.

ENGINE STALLS

1. TCC Solenoid Wire in Harness.

Inspect for and repair any short,
ground, or open.

2. TCC Solenoid Defective, Bent
Terminals or Debris Shorting
Terminals.

Check for codes, refer to
Diagnostic and testing.

3. Debris sticking the TCC Solenoid
Open.

Remove the TCC Solenoid and
try to blow air through it. No air
should flow. If air flows freely,
replace the TCC Solenoid.

4. TCC LU Control Valve Stuck.

Split the Electrohydraulic Unit
and inspect the TCC LU valve for
any debris. Remove debris if
present. If valve can't be freed
replace Electrohydraulic Unit.

ENGINE STALLS WHEN

TRANSMISSION IS

SHIFTED INTO R OR D.

1. Converter clutch or lock up control
valve malfunction.

1. Perform converter clutch
diagnostics test. Inspect valve
body for stuck or sticky lock up
control valve. If valve motion is
free, replace lock up solenoid and
retest.

2. Defective torque converter.

2. Replace torque converter.

CLUNK/CLICK NOISE

DURING GARAGE SHIFT

FROM R-D OR D-R

1. Stick-slip condition between output
flange and output shaft nut upon torque
reversal from R to D or D to R. Click
on first launch.

1. Replace output flange and nut.

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION NAG1 - Service Information - Nitro