Failure Determination & Warranty Claim Procedure

At OS Transmissions, all warranty-related concerns are subject to inspection, evaluation, and failure determination procedures prior to warranty approval.

Because transmission failures may result from multiple factors — including installation errors, external electrical faults, cooling system contamination, operating conditions, or internal component failure — all claims must follow the procedures outlined below.

These procedures help ensure accurate diagnosis, proper documentation, and fair evaluation for all parties involved.

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📌 Warranty Claim Initiation

If a customer, installer, fleet account, or vendor believes a transmission may have failed under warranty, OS Transmissions must be notified before disassembly, teardown, or repair work is performed.

Failure to follow warranty claim procedures may delay or void warranty consideration.

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🔍 Initial Failure Evaluation

Warranty-related concerns may require:

  • Vehicle inspection
  • Diagnostic scanning
  • Road testing (when applicable)
  • Fluid inspection
  • Cooler system inspection
  • External electrical inspection
  • Transmission teardown and internal inspection

OS Transmissions reserves the right to determine the appropriate inspection process based on the circumstances of the claim.

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⚠️ Unauthorized Disassembly

Transmission units must not be disassembled, opened, or modified by outside parties unless prior authorization is provided by OS Transmissions.

Unauthorized teardown or internal modification may void warranty consideration due to loss of inspection integrity and failure-source verification.

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📸 Documentation Requirements

To assist with warranty evaluation, OS Transmissions may require:

  • Diagnostic trouble codes (DTCs)
  • Installation invoices or receipts
  • Photos or video documentation
  • Cooler flushing documentation
  • Fluid type verification
  • Torque converter installation verification
  • Proof of proper electrical connection and startup procedures

Failure to provide requested documentation may result in denial of warranty consideration.

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🔧 Failure Determination Process

Final failure determination is made exclusively by OS Transmissions after inspection and evaluation.

Warranty claims may be classified under one or more of the following categories:

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✅ Internal Transmission Failure

Includes failures directly related to:

  • Internal rebuild workmanship
  • Assembly-related defects
  • Verified internal component failure within warranty coverage

These claims may qualify for warranty repair or rebuild consideration under OS Transmissions warranty terms.

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⚠️ Installation-Related Failure

Includes failures caused by:

  • Improper torque converter installation
  • Failure to properly seat converter
  • Improper fluid fill procedures
  • Incorrect fluid usage
  • Missing or disconnected electrical connections
  • Improper installation procedures
  • Failure to flush cooler lines

Installation-related failures are not covered under warranty.

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🔌 External Electrical or Vehicle-Related Failure

Includes:

  • Wiring faults
  • Sensor failures
  • Ignition switch issues
  • TCM/ECM related issues
  • External module failures
  • Vehicle electrical malfunctions affecting transmission operation

External electrical or vehicle-related failures are not considered transmission rebuild defects.

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🌡️ Cooling System or Contamination Failure

Includes:

  • Restricted cooler flow
  • Contaminated cooler lines
  • Debris reintroduced into transmission
  • Overheating conditions
  • Burnt fluid contamination

Failures resulting from contamination or cooling system issues are not covered under warranty.

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🚛 Severe Duty or Operator Abuse

Includes failures resulting from:

  • Aggressive shifting practices
  • Shock-loading
  • Repeated drive-to-reverse shifting under load
  • Excessive towing or hauling conditions
  • Commercial abuse beyond intended operating conditions
  • Continued operation after warning symptoms appear

Operator abuse or severe-duty damage will void warranty consideration.

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🧩 External Component or Supplier-Related Failure

Includes suspected failures involving:

  • Torque converters
  • External components supplied by third-party vendors
  • Customer-supplied components
  • Non-OS supplied parts

OS Transmissions reserves the right to inspect and evaluate all related components prior to warranty approval.

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💵 Paid Repair Option

If warranty coverage is denied due to installation error, operator abuse, contamination, overheating, external electrical issues, or other non-warrantable conditions, OS Transmissions may offer a paid repair or rebuild option when feasible.

Paid repair options may include:

  • Reuse of salvageable internal components
  • Replacement of damaged hard parts as needed
  • Additional labor charges related to teardown, inspection, cleaning, or rebuilding
  • Replacement of externally damaged or contaminated components

Any paid repair or goodwill pricing remains solely at the discretion of OS Transmissions based on the condition of the transmission and overall circumstances of the claim.

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🚫 Warranty Approval Limitations

Warranty approval may be denied if:

  • Unauthorized teardown occurred
  • Required documentation is unavailable
  • Failure resulted from installation or operator error
  • External vehicle issues caused transmission malfunction
  • Severe contamination or overheating is present
  • Vehicle continued operating after signs of malfunction

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🔍 Component Retention & Inspection

During warranty evaluation, OS Transmissions may retain, inspect, document, or submit failed components for further analysis.

This may include:

  • Torque converters
  • Filters and contaminated debris
  • Hard parts and internal assemblies
  • Valve bodies
  • Electrical components
  • Supplier-related components requiring external inspection

Components may be photographed, documented, or submitted to third-party suppliers or manufacturers when necessary to assist with failure determination.

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⚖️ Final Determination

All warranty determinations are made solely by OS Transmissions after inspection and technical evaluation.

Our goal is to provide fair, accurate, and technically supported warranty decisions while maintaining professional standards for rebuild quality and installation accountability.