2007-2008 Ford Explorer Sport Trac 4 WHEEL DRIVE/ ALL WHEEL DRIVE WITH CONTROL TRAC SHUDDER ON ACCELERATION

0

Filed Under (Ford) by admin on 24-01-2011

download
ISSUE Various 1997-2008 vehicles equipped with either 4 wheel drive or all wheel drive and equipped with control trac may exhibit a shudder on acceleration/deceleration, binding in slow speed turns or noise from the front driveline and/or transfer case. The shudder/binding will occur with the vehicle being operated in the awd/auto 4×4 mode. The shudder/binding may be due to incorrect tire circumference or improper tire inflation pressures. ACTION Follow the Service Procedure steps to correct the 1. Review the tire label for correct tire size and tire inflation pressures located at the B-Pillar of the driver’s door. 2. If the tire size does not match the label, this procedure does not apply, follow normal Workshop Manual (WSM) diagnostics. 3. If the tire size is correct, ensure tire pressures are within specifications. 4. Raise the vehicle on the hoist, refer to Workshop Manual, Section 100-02. 5. Disconnect all wiring going to the transfer case and road test. 6. Is the shudder/binding present? a. If the shudder/binding is still present, do not contine with this procedure, continue with WSM normal diagnostic for 4X4. b. If the shudder/binding is gone, proceed to Step 7. 7. Raise the vehicle on the hoist and reconnect all the wiring previously disconnected. 8. Using a tailor’s tape or flexible measuring tape and measure the circumference of all four (4) tires and record the measurements. (Figure 1)

1997–2001 Honda CR-V (4WD) Noise From the Rear Differential

0

Filed Under (Honda) by admin on 15-12-2010

download
SYMPTOM A screech or whine from the rear differential when making a tight turn at low speed (for example, in a parking lot when 4WD engages). PROBABLE CAUSE The differential fluid is contaminated or broken down, providing insufficient lubrication. CORRECTIVE ACTION Replace the dual pump fluid, and test-drive the vehicle. If necessary, replace the rear differential clutch, replace the oil pump assembly (1997 model only), and add a flow collar. REPAIR PROCEDURE 1. Drain and refill the rear differential with Dual Pump Fluid. 2. Check the tires for proper inflation (recommended cold inflation front and rear is 26 psi) and any variation in tire size or type. 3. Test-drive the vehicle in a parking lot. Make tight, low-speed turns. • If the noise is eliminated, return the vehicle to the customer. • If the noise is still present, go to step 4. 4. Remove the rear differential assembly (see page 15-16 of the 1997–01 CR-V Service Manual). 5. Remove the torque control differential case, then remove and discard the 30 mm shim and the clutch assembly (see steps 1 thru 10 on pages 15-20 thru 15-22 of the service manual).

2007-2008 Explorer Ford Sport Trac 4 WHEEL DRIVE/ALL WHEEL DRIVE – WITH CONTROL TRAC – SHUDDER ON ACCELERATION/DECELERATION OR BINDING ON SLOW TURNS

0

Filed Under (Ford) by admin on 29-11-2010

download
Various 1997-2008 vehicles equipped with either 4 wheel drive or all wheel drive and equipped with control trac may exhibit a shudder on acceleration/deceleration, binding in slow speed turns or noise from the front driveline and/or transfer case. The shudder/binding will occur with the vehicle being operated in the awd/auto 4×4 mode. The shudder/binding may be due to incorrect tire circumference or improper tire inflation pressures. ACTION: Follow the Service Procedure steps to correct the condition. SERVICE PROCEDURE NOTE: THIS DOES NOT APPLY TO 2006-2008 MOUNTAINEER WITH A 4.0L ENGINE OR 2007-2008 EXPLORER AND SPORT TRAC WITH 20 INCH WHEELS. Review the tire label for correct tire size and tire inflation pressures located at the B-Pillar of the driver’s door. If the tire size does not match the label, this procedure does not apply, follow normal Workshop Manual (WSM) diagnostics. If the tire size is correct, ensure tire pressures are within specifications. Raise the vehicle on the hoist, refer to Workshop Manual, Section 100-02. Disconnect all wiring going to the transfer case and road test. Is the shudder/binding present? a. If the shudder/binding is still present, do not contine with this procedure, continue with WSM normal diagnostic for 4X4. b. If the shudder/binding is gone, proceed to Step 7. 7. Raise the vehicle on the hoist and reconnect all the wiring previously disconnected. 8. Using a tailor’s tape or flexible measuring tape and measure the circumference of all four (4) tires and record the measurements. (Figure 1) 1. 2. 3. 4. 5. 6. 10. If the difference between these two averages is greater than 1/2″ (12.7 mm), front to back or side to side, replace the smallest circumference tire(s) and remeasure the tire averages. Refer to WSM, Section 204-04 for tire replacement.

Related entry:

2004 freestar vibrates on acceleration, 2007 Ford Edge when driving between 20 an 50 MPH makes vibration underneath,