Replacing and Maintaining 727 Transmission Mounts in Dodge Rams

Understanding 727 Transmission Mounts

727 transmissions have been used in many Dodge Ram heavy duty trucks over the years. These robust transmissions are known for their durability and reliability. However, like any mechanical component, they require proper maintenance and care for optimal performance.

One key aspect of 727 transmission maintenance is ensuring the mounts keep the transmission securely fastened while allowing slight movement. Transmission mounts serve the crucial purpose of absorbing vibrations and impact while keeping the transmission aligned. Worn out or damaged mounts can cause expensive transmission problems down the road.

Purpose of 727 Transmission Mounts

727 transmission mounts anchor the transmission to the vehicle frame or crossmember while allowing small movements from engine torque and road vibrations. This prevents excessive movement that could damage linkages or other components yet allows the flexibility needed for smooth operation.

The mounts act as shock absorbers by dampening vibrations before they transfer to the rest of the drivetrain or chassis. This reduces noise and potential metal fatigue over time. Mounts need to strike the right balance between vibration damping and secure positioning.

Types of 727 Transmission Mounts

There are two main types of transmission mounts used on heavy duty Dodge trucks equipped with the venerable 727 units:

• Rubber mounts - Made of rubber cushioning bonded to a steel sleeve/bracket. Provide flexibility and damping.
• Polyurethane mounts - Stiffer synthetic rubber compound for reduced movement. Increased durability and load-bearing capability.

The softer rubber mounts allow more small transmission movements and vibration control while the firmer polyurethane versions restrict excessive motion. Each has its advantages depending on vehicle usage and desired performance.

Signs of Worn Transmission Mounts

Since transmission mounts are constantly managing engine torques and chassis forces, they wear out over time. Here are some signs of failing 727 transmission mounts on your Dodge Ram:

• Visible cracking or splitting of rubber on mounts
• Excess vibration felt inside cabin at idle, accelerating, or braking
• Abnormal transmission noises or clunking when shifting
• Excess movement seen when engine revs or torque applied
• Mounts loose/wobbly when inspected underneath

Catching and replacing weakened mounts early prevents unnecessary transmission wear over the long run as well as improve ride comfort and quality.

Replacing 727 Transmission Mounts

While you can sometimes tighten loose factory mounts, replacement is the proper fix for cracked rubber or deteriorated mounts no longer supporting the transmission effectively. Here is an overview of the replacement process:

1. Safely support transmission with jack stands - don't let full weight hang unsupported!
2. Remove old mount hardware and detach mount from vehicle
3. Install new mount in same orientation utilizing new or good hardware
4. Carefully lower transmission fully onto fresh mount and fasten securely
5. Check for proper clearance/alignment before driving

Use high strength OEM spec or aftermarket mounts specifically engineered for heavy 727 applications. Avoid cheap knock-off parts not built to handle to stresses. Proper ratchet/wrench sizes and procedures for your specific Ram model should be followed.

Transmission Jacks

Most do-it-yourselfers don't have specialty transmission jacks on hand. However, they greatly simplify 727 transmission mount jobs and prevent injuries or slippage accidents. The right jack cradles the cumbersome transmission on removable arms so it can be raised/lowered smoothly as mounts get swapped out.

Jacks are placed at the rear section of RWD transmissions like the 727. Take all safety precautions when underneath supported vehicles during mount work. Consider bringing to a professional shop if DIY replacement seems unsafe or overly difficult.

Preventative Maintenance

While worn mounts must be replaced, you can take proactive measures towards maximizing the life of newer ones. Here are some tips:

• Inspect mounts whenever under truck to catch small cracks early
• Change fluid/replace filter to reduce operational vibrations
• Check engine and transmission mounts for deterioration together
• Have mounts checked whenever having chassis/suspension serviced

Well-maintained mounts can last upwards of 100K miles or more even supporting stalwart old trucks like those with the 727 trans. With preventative care and time swaps when required, your Dodge will continue shifting smoothly for years to come.

FAQs

What are the symptoms of a bad transmission mount?

Symptoms of a worn transmission mount include excessive vibration felt inside the cabin, abnormal transmission noises or clunking when shifting gears, excessive engine movement when revving, and visibly cracked/deteriorated mounts upon inspection underneath the truck.

Can you drive with a broken transmission mount?

It's not recommended to drive with a severely damaged or broken transmission mount. This can allow too much engine/transmission movement potentially leading to linkage disconnects or other mechanical damage over time. Replace deteriorated mounts as soon as possible.

How difficult is it to replace a 727 transmission mount?

Replacing 727 transmission mounts is moderately difficult for the average DIYer. Using a transmission jack simplifies the process greatly. Take proper safety precautions working underneath the truck. Consider a professional shop if the job seems too complex.

Should transmission mounts be replaced in pairs?

It's generally recommended to replace transmission mounts in pairs even if only one mount seems worn. If one mount is deteriorated, the other has undergone extreme stress as well. Replacing together restores full support evenly.