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Shop Racing Transmission Parts – Transmission Specialties
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ABOUT TSI

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For over 40 years, Transmission Specialties has been a trusted name in the performance transmission industry, leading the way as pioneers of much of the technology that is now commonplace in the transmission and converter market. TSI takes pride in designing, engineering, and assembling all its products in the USA at its state-of-the-art Philadelphia, PA facility.

From race-ready Powerglide and Turbo 400 transmission kits, to complete torque converters, billet machined covers, aerospace quality input shafts, billet valve bodies and much more, TSI has everything you need to shift your race program to the next level.

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TRANSMISSIONS TAILORED
TO YOUR NEEDS

From entry-level Powerglide transmissions to all-out, race-ready Turbo 400 units, Transmission Specialties can build the complete transmission package perfectly suited for your racing needs. TSI has been building race-winning transmission combinations for more than 40 years, with each iteration undergoing years of continuous, rigorous R&D and real world on-track testing.

Unlike many production builders, each TSI transmission is built from beginning to end by the same dedicated expert transmission technician. This process guarantees that the customer gets the highest quality product every time.

TORQUE CONVERTER KITS
& EXPERT SERVICING

Transmission Specialties has the expertise to build a torque converter kit tailored to your specific needs and performance goals. As the innovators of the spragless converter, TSI uses advanced engineering techniques and precision manufacturing to design and craft quality racing torque converters that optimize power transfer and overall performance. From single-disc street converters to triple-disc lock-up race converters, and everything in between, a torque converter from TSI will power you to the winner’s circle every time.

Time to service your torque converter or looking to make a stall adjustment without buying a completely new unit? Transmission Specialties can freshen up, repair, and adjust your converter setup. Once received, your converter will be precision cut, cleaned, repaired or tuned using only the highest quality of parts. From there, it will be rewelded and balanced by one of our highly skilled converter specialists. Lead times can vary, but normal turnaround time is
typically 3-5 days.

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PARTS ON HAND,
SHIPPING DAILY

With the new age of forced induction applications becoming more popular and your common racecar build producing more power than ever, the chances of something failing in your transmission or torque converter steadily increase over time. Transmission Specialties has a large warehouse that stocks a vast inventory of input/output shafts, drums, planetaries, pumps, valve body parts, rebuild kits and much more to get your build repaired and back on the track as quickly as possible.

TSI COMPANY HIGHLIGHTS

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Customer Service


Need help, call 610-485-9110


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  • Shop
    • Torque Converters
      • Race Series Torque Converters
      • Street Series Torque Converters
      • Street/Strip Torque Converters
      • Mud Series Torque Converters
      • Shop All
    • Transmissions
      • Powerglide
      • TH400
      • 4L80E
    • Transmission Parts
      • Shop All
      • Bushings
      • Drums & Hubs
      • Misc Parts
      • Planetaries
      • Pumps, Gears & Parts
      • Servos & Parts
      • Shafts
      • Transmission Case
      • Transmission Pan
      • Transmission Rebuild Kits
      • Valve Body Parts
    • SFI Racing Flexplate
  • Resources
    • WHY A SPRAGLESS CONVERTER
    • PERFORMANCE CONVERTER PARTS
    • SPEC A RACE CONVERTER
    • WHY CHOOSE TSI
    • INSTALLATION INSTRUCTIONS
  • About Us
    • About TSI
    • Contact
  • Services
  • Tech Support
  • Blog
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