Description
SIERRA Borg-Warner Velvet Drive 71 / 72 Transmission Seal Kit – 18-2590
Sierra 18-2590 is a Transmission service seal kit engineered for the specified marine application. Borg-Warner Velvet Drive 71 and 72 Series marine transmissions.
- Service seal/gasket kit for Velvet Drive 71 and 72 Series marine transmissions.
- Intended for resealing during transmission service without the friction-plate content of the full overhaul kit.
- Provides matched sealing components for the transmission family rather than generic individual seals.
- Useful when leakage or disassembly requires renewal of aged sealing components.
- Confirm the exact Velvet Drive model/ratio and service manual before teardown.
For marine drive and engine service parts, fitment can vary by model, serial number, gear ratio, casting and prior service history. Compare the original OEM number and physical configuration before installation, and replace related seals, bearings, locking hardware, hoses or cable components when their condition requires it.
Specifications
- Manufacturer: Sierra
- Part Number: 18-2590
- Part Type: Transmission service seal kit
- Application: Borg-Warner Velvet Drive 71 and 72 Series marine transmissions.
- Transmission Family: Borg-Warner Velvet Drive 71 / 72 Series


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