Dodge Nitro. Manual — part 325

Fig. 80: Installing Extension Housing Onto Transmission Case
Courtesy of CHRYSLER LLC

68. Install the extension housing (2) onto the transmission case, 4X2 vehicles only. See Fig. 80.

1 - TRANSMISSION CASE
2 - EXTENSION HOUSING

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION 42RLE - Service Information - Nitro

Fig. 81: Adapter Housing Fasteners
Courtesy of CHRYSLER LLC

1 - STUD, ADAPTER/EXTENSION
2 - TRANSMISSION MOUNT FASTENERS (4)
3 - TRANSMISSION MOUNT
4 - TRANSMISSION CASE
5 - NUT, EXHAUST HANGER BRACKET (2)
6 - STUD, ADAPTER/EXTENSION
7 - TRANSMISSION OIL PAN
8 - BOLT, ADAPTER/EXTENSION (2)

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION 42RLE - Service Information - Nitro

Fig. 82: Installing Adapter Housing Bolts
Courtesy of CHRYSLER LLC

69. Install the bolts that hold the adapter or extension housing onto the transmission case. Be sure to install

any stud bolts to their original locations. Tighten the bolts to 54 N.m (40 ft.lbs.). See Fig. 82.

NOTE:

Before installing the lowermost four adapter/extension housing bolts, it
will be necessary to replenish the sealing patch on the bolts using Mopar®
Lock & Seal Adhesive.

1 - TRANSMISSION CASE
2 - ADAPTER HOUSING
3 - BOLTS

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION 42RLE - Service Information - Nitro

DIAGNOSIS AND TESTING

PRELIMINARY

Two basic procedures are required. One procedure for vehicles that are drivable and an alternate procedure for
disabled vehicles (will not back up or move forward).

VEHICLE IS DRIVABLE

1. Record all DTCs and the accompanying DTC Event Data.

2. Check for an appropriate Technical Service Bulletin that applies to the customer complaint.

3. Check fluid level and condition.

4. Road test and note how transmission upshifts, downshifts, and engages.

5. If the complaint was related to shift quality, perform the TCM QUICK LEARN procedure , and the

DRIVE LEARN Procedure .

6. If the shift complaint still exists, compare actual line pressure (sensor reading, using the scan tool) to the

Desired Line Pressure reading, in Park, Drive, and Reverse at 1500 RPM. Check that the LP sensor reads
30 psi (the minimum it should ever display) with key on/engine off.

7. Perform air-pressure test to check clutch operation. See DIAGNOSIS AND TESTING.

8. Replace the Transmission Solenoid/TRS Assembly and perform the Quick Learn and Drive Learn

procedures again.

9. If the complaint still exists, remove, inspect, and repair the transmission as necessary.

VEHICLE IS DISABLED

1. Record all DTCs and the accompanying DTC Event Data.

2. With engine running, place transmission in gear and verify correct PRNDL reading. Observe the Input

and Output speeds using the scan tool. If output RPM is greater than zero but vehicle does not move,
check for transfer case in Neutral (or failed internally), failed propshaft, or failed/disconnected drive axle.
If output RPM is zero and input RPM is greater than zero, internal transmission slippage is indicated. Run
clutch slip tests using the scan tool, check oil pan for debris, and air check the various clutch circuits.

3. Shift the transmission into neutral, if both input and output speeds are zero, check flexplate bolts, torque

converter, and transmission input shaft.

4. Compare actual line pressure (sensor reading, using the scan tool) to the Desired Line Pressure reading, in

Park, Drive, and Reverse at 1500 RPM. Check that the LP sensor reads 30 psi (the minimum it should
ever display) with key on/engine off. If line pressure is incorrect, check fluid level and condition.

5. Remove, inspect, and repair the transmission as necessary.

HYDRAULIC PRESSURE TESTS - 42RLE

NOTE:

Before preforming the hydraulic pressure tests be certain to disconnect the
Variable Line Pressure (VLP) electrical connector at the transmission. Check for
and clear any codes that may have been set after preforming any hydraulic
pressure test and connecting the Variable Line Pressure (VLP) electrical

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION 42RLE - Service Information - Nitro

2007 Dodge Nitro R/T

2007 AUTOMATIC TRANSMISSION 42RLE - Service Information - Nitro