TC Remanufacturing TO91 Automatic Transmission Torque Converter

Automatic Transmission Torque Converter for Toyota

TC Remanufacturing TO91 is a lock-up automatic transmission torque converter built for select Toyota truck and SUV applications. It is specified with an 11.850-inch converter diameter, 10.600 bolt circle, 6 pads with 9mm x 1.25 mounting thread size, and a slotted hub type for the listed Toyota fitments.

Key Features

• Part number: TO91
• Automatic transmission torque converter
• Lock-up converter type
• Low stall specification
• 11.850-inch converter diameter
• 10.600 bolt circle
• 6 pads with 9mm x 1.25 mounting thread size
• Slotted hub type
• 20 spline count
• 1.257 pilot diameter
• No ring gear
• Converter codes: 53A040, 320, 5304, 5A1

Detailed Description

TC Remanufacturing TO91 is an automatic transmission torque converter for Toyota Tacoma, Toyota Tundra, and Toyota Sequoia applications. The lock-up design supports efficient power transfer in the transmission, while the low stall specification and listed dimensions help match the original drivetrain setup for the covered vehicles. This part number TO91 is identified by converter codes 53A040, 320, 5304, and 5A1 for application matching.

Compatible with 2005-2015 Toyota Tacoma, 2005-2014 Toyota Tundra, and 2005-2009 Toyota Sequoia. Use the listed bolt circle, spline count, pilot diameter, and mounting pattern to verify the correct transmission hard part before installation.

Common Issues This Part Addresses

• Transmission shudder during lock-up operation
• Slipping or inconsistent torque transfer
• Incorrect stall behavior from a worn converter
• Vibration or engagement concerns tied to converter wear
• Fitment problems when replacing a damaged original converter

Installation Notes and Tips

Confirm the transmission code, converter code, spline count, pilot diameter, and mounting pattern before installation. Inspect the transmission fluid, cooler, and related hard parts for contamination or wear so the replacement converter is installed into a clean system. Proper alignment of the hub and mounting pads is important for correct engagement.

Quality Assurance

TC Remanufacturing supplies transmission hard parts for service replacement applications, and TO91 is built to match the listed Toyota fitment and dimensional specifications.