Tag Archives: automotive

Anchor Industries: Transmission Mounting Trouble Signs

Don’t wait until it’s too late!

Practical tips for driveline mount failure signs and diagnosis


Key Causes
Transmission Mounting Trouble: Why mounts lose their resiliency and function efficiency- ultimately leading to failure

  • Acceleration
  • Hot and Cold Temperatures
  • Age and Ozone
  • Engine Torque
  • Braking
  • Collision Damage

TRANSMISSION MOUNTING TROUBLE: SYMPTOMS CAUSES AND RELATED VEHICLE PROBLEMS
Excessive Shifting or Misaligned Engine

An engine that appears out of alignment, relative to its normal position. This is caused by severely damaged mounts that will not keep an engine properly aligned and positioned to allow for adequate engine operation, and adequate operation of all of the supporting drive accessories. Probable Cause: Broken or severely damage mounts

Related Vehicle Problems (Check or replace mounts when doing these repairs):
Radiator repair: A punctured radiator from the fan blade could be caused by dramatic engine shift due to a broken mount.

Repairing exhaust leaks: Cracks or broken exhaust head pipe where it connects to the exhaust manifold.

Repairing damaged valve covers or other engine drive accessories like power steering pumps, water pumps or A/C compressors: In extreme cases broken motor mounts can allow a vehicle’s engine to shift and turn violently, especially during rapid engine acceleration, and/or high speed driving. This can cause physical damage if the engine turns far enough to one side to allow contact between the engine and the sides of the vehicle engine compartment. Engine parts can become cracked, broken or dented as the result of broken motor mounts.

Replacing Belts and Hoses: Severely damaged or broken mounts can cause engine belts and hoses to break and/or snap if the engine is allowed to shift back and forth excessively. Belts and hoses, especially water pump, power steering belts and radiator hoses, can be stretched abnormally and severely damaged or broken.

For more information on Transmission Mounting Trouble download the PDF here.

Visit anchor-online.com for details about transmission mounts.

Anchor Industries: Engine Vibration Causes

Engine Vibration May Not be Due to a Improperly Tuned Engine

It’s Most likely a Sign of Worn or Broken Driveline Mounts

When engine vibration is noticeable at idle, especially with 4 cylinder, odd-fire V6 and diesel engines, it is most likely a sign that the mounts are worn or completely broken. These vibrations tend to worsen when the A/C compressor is engaged.

Over time, the rubber portion of a mount will deteriorate and often separate from the support /mounting plates, or crack and deform. The result is excessive vibration.

Many late model vehicles use hydraulic liquid–filled mounts to minimize NVH (Noise, Vibration and Harshness). The liquid is contained in the hollow cavity inside the mount. As the part ages, leaks can occur causing the mount to deflate and lose its ability to dampen vibrations. It can also affect other related parts on the vehicle.

Note: Always replace hydraulic mounts with a new hydraulic mount when offered in order to maintain the original dampening characteristics that were designed for the vehicle.

On high mileage vehicles, replacing all the mounts at the same time will help eliminate annoying vibrations and reduce the risk of other mounts failing shortly after the original repair.

“ACTIVE” MOUNTS ARE THE LATEST TECHNOLOGY INTEGRATION IN DRIVELINE MOUNTS
“Active” motor mounts incorporate hydraulics, along with a vacuum pump or electronic sensor to change the dampening characteristics. Active mounts are designed to be fairly elastic during idle and then stiffen up under higher engine RPM’s and loads to absorb engine vibration.

Late model applications that currently have integrated active mounts into their vehicles are Acura, Honda, Hyundai, Kia, Infiniti, Lexus, Nissan and Toyota.

For more information download the PDF here.

Anchor Industries: Why Transmission Mounts Fail

Why Mounts Fail

  • Rapid Acceleration
  • Extreme Temperature Changes
  • Age & Atmosphere
  • Engine Torque & Vibration
  • Sudden Braking
  • Road Conditions

What Happens When Mounts Fail

1. Vibration
Worn mounts do not absorb vibration or the loads that result from normal engine and transmission operation. As a result, there is increased vibration transmitted to the passenger compartment. And with the advent of the front wheel drive, transverse mounted engine and even with the additional number of mounts used per vehicle, failed mounts still create noticeable vibration.

2. Accelerator Linkage Sticks
When a mount is broken, it can no longer support the engine in the proper manner. During acceleration it can lift up and cause the accelerator linkage to bind by varying degrees or may cause it to stick in the wide open position.

3. Fan Scrapes
Should the engine sag abnormally or rise during acceleration due to collapsed mounts, the fan may be far enough out of position to strike the radiator or the shroud.

4. Misalignment
Worn or broken transmission mounts affect the true alignment between the powertrain and frame which is vital to efficient operation. If left unrepaired it will put added stress on other related components, including CV shafts, U-joints, bearings, etc.

5. Misaligned Transmission Linkage
Broken mounts cause misalignment of transmission linkages. This can result in harsh shifts. It can also cause shifts at improper speeds or cause slipping.

6. Road Debris
Under normal driving conditions dirt and debris can get lodged into the transmission mount, causing premature wear and failure.

For more information download the pdf document here.

Anchor Industries: Addressing Stud Sheering Problems on Late Model GM Applications

Anchor Industries Tips

GM has issued a Tech Service Bulletin (TSB 05-08-61-007A) regarding a clunking noise from the front of the vehicle while driving and/or shifting on a 2000-2005 Cadillac Deville and 2001-2003 Oldsmobile Aurora with the 4.6L engine. This bulletin supersedes TSB 05-08-61-007 and applies to Anchor transmission mount # 3020.

The Issue:
These vehicles may exhibit a clunking noise from the front of the vehicle while driving and/or shifting from Park to Drive, from Park to Reverse, from Drive to Reverse or from Reverse to Drive. This condition is often caused by a deteriorating mount due to high heat from the engine manifold or if the mount was not properly aligned during installation.

The Solution:
Inspect the mount for signs of wear, compression and aging. Check to see if the mount alignment tab is properly seated in the provided hole of the chassis.

2897 TRANSMISSION MOUNT STUD SHEERING PROBLEMS

Anchor Industries transmission mount #2897 fits 2000-2005 Buick, Pontiac and Oldsmobile vehicles with the 3.8L engine. The 2897 mount has grooves on the bottom metal mounting plate and needs to be aligned with the notches on the vehicle’s frame. If not properly aligned, the torque from the engine can twist the mount out of position and sheer off the stud, resulting in a loud clunking noise and increased drivetrain vibration.

During installation carefully inspect the position mounting plate to make sure of proper alignment with the notches on the vehicle’s frame. This will help eliminate sheering of the mount stud.

Note: It is also important to not over torque the transmission mount bolt. The proper torque specification for this application is 52 ft. lbs.

Download the PDF here.

Visit Anchor Industries website for more details on mounts.