Automatic Transmission Archives - Page 4 of 5 - Import Car
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).

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: 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.

Volkswagen Tech Tip: ATF Seeping from Final Drive Breather

ATF fluid may seep from the final drive breather vent on any Volkswagen model with a four-speed automatic transmission (AG4). To correct this problem, remove the final drive cover, drain the ATF and reinstall the cover. Refill the final drive with ….

Tech Tip: Mercedes-Benz A/T Fluid Leaks at the Electrical Connector

A 2002 ML 500 with a 722.6 automatic transmission may leak oil in the area of the electric connection. Secondary concerns may be oil in the wiring harness. Perform the following procedure to resolve the problem. Clean the transmission in the affected area and replace the electrical connector and the related O-rings ….

Diagnostic Solutions: Transmission Electronics…Contined Refinement of Electronically Controlled Transmissions Shifts Fuel Efficiency into High Gear

Electronic automatic transmissions have gained popularity in recent years because of the flexibility that on-board electronics can provide in the area of powertrain management. Electronic transmission controls, for example, have done away with the rough, imprecise shifting patterns inherent in early mechanically controlled transmissions. With the continued refinement of electronically controlled automatic transmissions, an automatic

A Eulogy to the Overdrive? It is Not Dead Yet

r set for overdrive and a roller clutch to drive the output shaft. The Borg Warner and Doug Nash mechanicals are quite different from the GV overdrive. This is most probably the reason they are no longer in production. The Borg Warner used a shifting a linkage, collar and gear to mechanically connect the input