Can Welding Save Your Cracked Subaru Transmission? Exploring Repair Options and Risks

If you’re a Subaru owner or enthusiast, you know how important a functioning transmission is for the overall performance of your vehicle. However, what happens when you discover a cracked transmission? Can welding be a viable solution to save your beloved Subaru? In this article, we will delve into the possibility of welding a cracked transmission, the risks involved, alternative repair options, and the signs that might indicate a damaged transmission. Let’s embark on this automotive journey together!

Understanding a Cracked Transmission and its Impacts

Before we discuss potential repair methods, let’s first understand what a cracked transmission entails and how it can impact your Subaru’s performance. A cracked transmission refers to a fracture or breakage in the casing that houses various internal components. It can lead to transmission fluid leaks, loss of torque, difficulty in shifting gears, and even complete transmission failure.

Can Welding Be an Option?

Welding a cracked transmission might sound like a plausible solution, but it’s important to evaluate its feasibility and potential risks. While welding can repair the crack and restore structural integrity to some extent, it is essential to consider the following factors:

  1. Material Compatibility: Subaru transmissions are often made of aluminum or other lightweight alloys, which can be challenging to weld. Welding these materials requires specialized techniques and expertise to prevent further damage.

  2. Heat Affected Zone: Welding generates heat, which can result in a heat-affected zone around the weld. This can potentially weaken the surrounding areas or affect the functionality of internal components.

  3. Structural Integrity: Although welding may mend the crack, it is crucial to assess whether the repaired transmission will maintain its structural integrity under the stress and pressure of regular use.

  4. Long-Term Durability: While welding may provide a temporary fix, it’s essential to consider the long-term durability. Is welding a cracked transmission a permanent solution, or will it require further repairs or replacements in the future?

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Expert Opinions and Case Studies

To provide a well-rounded perspective, let’s explore expert opinions and real-world case studies regarding welding cracked Subaru transmissions. While some enthusiasts claim success with welding repairs, it is essential to note that these experiences may not apply universally. One individual’s success story does not guarantee the same results for everyone. It’s always advisable to consult with professionals or experienced mechanics before attempting any repairs.

Alternative Repair Options

Welding might not be the only solution for a cracked Subaru transmission. Consider these alternative repair options:

  1. Transmission Replacement: In some cases, replacing the cracked transmission might be the most reliable and long-term solution. While it can be a more expensive option, it ensures a fully functional and properly sealed transmission.

  2. Professional Welding Services: Instead of attempting a DIY welding repair, entrusting the task to a skilled welder who specializes in automotive repairs can minimize the risks and ensure the best possible outcome.

Precautions and Considerations

If you decide to pursue welding as a repair option, it’s essential to take certain precautions and considerations into account:

  • Expertise: Welding a cracked transmission requires expertise in automotive welding and an understanding of the particular material used in Subaru transmissions.

  • Surface Preparation: Properly preparing the cracked area before welding is crucial. It involves thoroughly cleaning and removing any contaminants that could affect the quality of the weld.

  • Quality of Welding: Utilizing the right welding technique, equipment, and materials is essential for satisfactory results. Ensure that the welder follows best practices and uses appropriate welding methods.

  • Post-Welding Inspection: After the welding repair, it is crucial to conduct a thorough inspection to verify the structural integrity and functionality of the transmission. This can help avoid unforeseen issues down the road.

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Signs of a Damaged Transmission

To promptly address potential transmission problems, it’s important to be aware of the signs that could indicate a cracked transmission in your Subaru. Keep an eye out for the following symptoms:

  • Transmission Fluid Leaks: Spotting puddles of transmission fluid under your vehicle or noticing a decline in fluid levels could signal a cracked transmission.

  • Difficulty Shifting Gear: If you experience difficulty shifting gears or notice grinding noises during gear changes, it may be an indication of transmission damage.

  • Loss of Power or Torque: A cracked transmission can result in a loss of power or torque, causing your Subaru to underperform or struggle to accelerate.

  • Warning Lights: Illumination of the "Check Engine" or transmission-related warning lights on your dashboard should never be ignored and may indicate a transmission problem.

Frequently Asked Questions (FAQ)

Q: Can a cracked Subaru transmission be welded?

A: While welding may be a potential repair option, it is essential to consider the feasibility, risks, and alternative repair methods before proceeding.

Q: Is welding a cracked transmission a permanent solution?

A: The durability of a welded repair can vary depending on various factors such as material compatibility, welding technique, and structural integrity of the transmission. Consult with professionals for more personalized advice.

Q: What are the alternative repair options for a cracked Subaru transmission?

A: Replacing the cracked transmission or seeking professional welding services are alternative repair options to consider.


When faced with a cracked transmission in your Subaru, the possibility of welding it may offer a glimmer of hope. However, it is crucial to evaluate the feasibility, potential risks, and alternative repair options before embarking on any repair journey. Be sure to consult with professionals or experienced mechanics who can provide personalized advice based on your specific situation. Remember, a well-informed decision will help ensure the longevity and performance of your cherished Subaru. Safe travels!

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Billy Covington

With a passion for all things automotive, Billy is our go-to expert on Subaru performance upgrades and modifications. He's been featured in several car magazines and blogs, and his extensive knowledge and expertise make him a valuable member of our team. When he's not working on cars, he enjoys playing guitar and writing music.

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