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