GM Drivetrain Tech Tip: Transfer Case Leaking Fluid
Fluid Leak at Left Hand Transfer Case Weep Hole or Between Transfer Case and Transmission (Replace Left Transfer Case Input Shaft Seal or Transfer Case O-Ring Seal). Models equipped with 6T45/70/75 Transmission RPO Codes MHC/MH4/MH6 for GM or AF33-5 AWD/PTU Automatic Transmission (RPO M45) for 2007-2008 Suzuki and Getrag 760 or 790 Power Takeoff Unit (Transfer Case).
TECH TIP: GM Transmissions/Transfer Case: Slight Vehicle Movement in Park at Start Up
Some vehicles may rock or move slightly forward or rearward while in park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
Tech Tip: Humming Sound From Front of Volkswagen Vehicles During Cornering
A customer states that a humming sound is coming from the front of the vehicle on turns in vehicles equipped with a 02J or 0A4 manual five-speed transmission. The hum may be more noticeable during slow speed turning maneuvers with the steering wheel almost to full travel. The hum diminishes when the steering wheel is straight.
This hum may be generated by the differential spider gear contacting the one-piece thrust washer when it is under load.
Tech Tip: Solving Noise/Judder in Honda Pilot and Ridgeline Models
Honda Pilot or Ridgeline owners may complain about a noise and judder from the rear when turning. The cause and repair of the problem can be simple. The differential fluid may be contaminated by clutch wear, condensation or both. Contamination will cause the differential clutches to make noise and shake when turning.
Transtar Introduces New Line of Complete Automatic Transmission Units
Remanufactured in the U.S. and to OE quality, this new line offers applications for all major foreign and domestic vehicles.
Tech Tip: Acura with Idle Vibration/Harsh Shifting Issue
If a customer complains of a vibration at idle or harsh engagement when shifting the transmission between Park, Drive and Reverse, the probable cause is the front hydraulic engine mount may have deteriorated and torn.
Servicing Hybrids: 10 Must Read Articles for Servicing Hybrid Vehicles from Ford, GM, Toyota, Honda and Nissan
Currently, there are about 1.2 million hybrid vehicles on the road. Within five years, hybrids are expected to account for 20 to 25% of all new car and light-truck sales. So sooner or later, you’ll be working on these vehicles at your shop. These vehicles have the same service opportunities like brake pads, filters and suspension parts that need replacement. Also, battery packs, electric motors and computers will need service soon. Below are the top ten hybrid articles so you can cash in.
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
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.
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
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.
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).