Part Number TRA-645-428 — 1964–1966 Mustang T5 5-Speed Conversion Kit for V8 5-Bolt Bellhousing,
Upgrade your early Mustang with our complete T5 5-Speed Conversion Kit, engineered for a seamless bolt-in upgrade to modern overdrive performance while retaining the originality of your classic drivetrain. This kit is designed for Mustangs equipped with a factory 5-bolt bellhousing, including support for select 260, 289 V8 configurations.
Compatible with the original 5-bolt Dagenham bellhousing small block, casting #C3AA-6394-C. this kit allows installation of a 1983–1993 Ford T5 5-speed transmission using the stock clutch linkage or a modern cable setup.
Key Features:
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Precision CNC machined, injected molded adapter plate (TRA-645-423)
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Adapter plate adapts T5 transmission bolt pattern to original bellhousing
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Supports 260ci, 289 V8 (Dagenham #C3AA-6394-C)
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Late-model T5 compatibility: 1983–1993 Ford T5 or TREMEC T5
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Requires two clearance holes to be drilled into bellhousing
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Includes crossmember bar with e-brake bracket (TRA-656-522)
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Includes steel/rubber trans mount insulator pad (TRA-650-521)
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Includes driveshaft slip yoke (TRA-650-517)
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Fits 1964–1966 Mustangs and other Ford applications
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Proudly Made in the USA by California Pony Cars
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Lifetime Warranty included
Installation Notes:
Original 5-bolt bellhousings require modification:
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Drill clearance hole
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Adapter plate compensates for T5 input shaft length and bolt pattern
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Use original clutch linkage or cable conversion as needed
For 260ci, 289 V8 Mustangs, this kit supports installation using bellhousing #C3AA-6394-C, adapting the Dagenham bolt pattern to the later T5 configuration.
Caution:
Always verify pilot bushing fitment — some T5 transmissions have a smaller pilot diameter, and improper fitment can lead to clutch chatter or gear disengagement.
Compatibility Note:
This kit is designed to work with TRA-000-389 (TREMEC T5 5-Speed) and is not compatible with TRA-000-361 (TREMEC TKX/TKO). Call for TKX/TKO adapter details.
What's Included (Part Numbers):
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(1) Adapter Plate – TRA-645-423
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(1) Crossmember Bar w/ E-Brake Bracket – TRA-656-522
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(1) Transmission Mount Insulator – TRA-650-521
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(1) Slip Yoke – TRA-650-517
Watch Installation Video:
View the adapter plate installation here on YouTube
Technical Resource:
T5 Five-Speed Transmission Swap - Mustang & Fords Magazine
Proudly Made in the USA by California Pony Cars, the trusted name in Mustang T5 conversion components for over 35 years.
