Tech Tip: An Economical And Effective Way To Refinish A Seal-Worn Shaft Grooves from shaft wear can allow oil to leak out, which can result in bearing damage and failure. More

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, regardl More

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. More

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. More

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 cc total) of Automatic Transmission Fluid Treatment... More

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. More

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. More

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... More

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... More

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. More