Tech Tip: A/T, M/T Crossmember Service Precautions
When performing service work or installing an accessory short-throw shifter on any Subaru vehicle, it’s extremely important that the transmission is supported properly when removing or reinstalling the cross member. If not, damage to the bolts and/or threads will occur. Service Tips: 1. Support the transmission using a transmission jack, regardless if the vehicle is
Diagnosing Mercedes-Benz Low Range Light Flashes, Code P1831
If you receive customer reports in the affected model vehicles of the low range light flashing rapidly (18 times) after vehicle start with fault code P1831 (positioner motor, position sensor or power supply is faulty) in transfer case ECU, do not replace the transfer case motor.
Tech Feature: Mass Airflow Sensors Are Critical In Today’s Engine Management Systems
In addition to providing an exact measurement of airflow into the engine, airflow sensor inputs can be used to provide a load-sensing input to the powertrain control module (PCM) to help control the shift points and shift quality of an automatic transmission.
Nissan Tech Tip: Chirp Noise on 2-3 Upshift
If a 1999-2000 Quest or Altima exhibits a “chirp” noise as the automatic transmission shifts from 2nd to 3rd gear, particularly when accelerating the vehicle with only 1/8 throttle applied, the noise may be coming from the high clutch assembly during operation. This noise can be eliminated by adding two bottles (200 cc each, 400
Honda Tech Tip: Rear Differential Moan or Groan
On 2002-’07 CR-Vs with 4WD, a moaning or groaning noise may come from the rear differential when making a sharp or tight turn at low speeds. This condition may be caused due to contamination in the rear differential fluid.
Tech Tip: Volkswagen’s ATF Seeping from Final Drive Breather
ATF fluid may seep from the final drive breather vent on any model with a four-speed automatic transmission. To service, Remove the final drive cover, drain the ATF and reinstall the cover (always use a new gasket).
Tech Tip: Chrysler Intrepid Won’t Shift, DTCs Set
Automatic overdrive transmission goes into second gear (limp-in mode) and will not shift, and trouble codes for the transmission solenoid pack are stored in memory.
Tech Tip: Put a Damper on Booming Astro Van Harmonic with Rear Axle Parts
Some 1995-2004 Chevrolet Astro Van and GMC Safari owners may complain about a “boom” noise inside the vehicle while driving at speeds between 60-65 mph. This condition is most noticeable from behind the driver’s seat. The noise may result from an engine-firing harmonic, which becomes noticeable at torque converter clutch (TCC) lock-up. A new rear leaf spring damper kit (one per spring) has been developed, to be used in conjunction with a pinion nose damper tuned to 86 Hertz (Hz) to reduce the resultant noise level.
Tech Tip: Combat ‘Hot Spots’ with a New Flywheel
Here’s the scenario: Your customer drops off her car for a clutch replacement. As a matter of course, you have the flywheel resurfaced prior to installing the new clutch; all seems well when the customer drives away. Later that month, the customer returns, complaining of clutch chatter. The assumption might be a defective or incorrectly installed clutch, but the culprit may be that resurfaced flywheel.
BMW Engine, Transmission or Clutch-Related Complaints
Various complaints concerning the engine, transmission, clutch or noise characteristics of the vehicle have been traced to the absence or damage of the alignment dowels between the engine and transmission.
Mercedes-Benz Low-Range Light Flashes, Code P1831
If you receive customer reports on an applied vehicle of the low- range light flashing rapidly (18 times) after vehicle start with fault code P1831 (Positioner motor, position sensor or power supply is faulty) in the transfer case ECU, do not replace the transfer case motor.
Tech Tip: Installing Reman Engines and Transmissions
With new car sales down, people are keeping their vehicles longer and racking up more miles on their engines. That means there’s a growing opportunity to install a remanufactured engine in a customer’s vehicle if their original engine or transmission has reached the end of the road. Most engines will go quite a few miles with proper maintenance. But if the owner scrimps on regular fluid, oil and filter changes, neglects the coolant, never changes the spark plugs, or ignores little problems, it may lead to premature engine failure.