TC Remanufacturing HD3688-6-2 Automatic Transmission Torque Converter

Ford Super Duty Torque Converter

TC Remanufacturing HD3688-6-2 is an automatic transmission torque converter built for Ford Super Duty and E-Series applications that call for a 12.750-inch multi disc lock up design. It matches the listed converter codes and dimensions for direct-fit service on supported vehicles, including Ford F-250 Super Duty, Ford F-350 Super Duty, Ford E-250, and Ford E-350 Super Duty applications.

Key Features

• Automatic transmission torque converter from TC Remanufacturing
• Part number: HD3688-6-2
• 12.750-inch converter diameter
• Multi disc lock up converter type
• 1500-1700 stall speed range
• 11.375 bolt circle with stud mounting
• 1.375 pilot diameter
• 31 spline count
• Flats / stepped hub type
• Converter codes: 6MM, WW9
• No ring gear

Detailed Description

TC Remanufacturing HD3688-6-2 is an automatic transmission torque converter specified for Ford truck and van platforms that use the listed 31-spline, stud-mounted configuration. The 12.750-inch diameter and multi disc lock up construction support controlled coupling in the transmission, while the 1500-1700 stall range and 11.375 bolt circle help match the original application requirements. This part number is a strong fitment reference when sourcing a replacement torque converter for Ford E-350 Super Duty, Ford F-250 Super Duty, and Ford F-350 Super Duty service work.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

• Fits 2015-2016 Ford E-350 Super Duty, N/A
• Fits 2005-2008 Ford E-350 Super Duty, N/A
• Fits 2007-2010 Ford F-250 Super Duty, N/A
• Fits 2005-2010 Ford F-350 Super Duty, N/A
• Fits 2007 Ford E-250, N/A

Common Issues This Part Can Address

• Torque converter shudder during lockup operation
• Delayed or inconsistent transmission engagement
• Excessive slip under load
• Vibration related to a worn converter clutch assembly
• Restoration of proper stall and coupling characteristics

Installation Notes and Tips

Verify the converter codes 6MM and WW9, the 31-spline count, the 1.375 pilot diameter, and the 11.375 bolt circle before installation. Confirm the transmission build and OE-style mounting arrangement on the vehicle, and inspect the transmission fluid, cooler, and related hard parts during replacement to help prevent repeat failure. Match the application exactly for Ford E-250, Ford E-350 Super Duty, Ford F-250 Super Duty, and Ford F-350 Super Duty service.

Quality Assurance

TC Remanufacturing supplies this torque converter with application-specific dimensions and configuration details that support accurate replacement selection for the listed Ford Super Duty and E-Series vehicles. Use the part number HD3688-6-2 and the converter specifications to confirm fitment before ordering.