ATI Releases Vasco Main Shaft For The 4L80E/4L85E Transmission

New from ATI – the Vasco Main Shaft for the 4L80E/4L85E transmission. This main shaft is a direct replacement designed to be significantly stronger than stock. See more details below.

Official Release:

ATI Performance Products, Inc proudly introduces an all-new Vasco Main Shaft for the 4L80E/4L85E transmission. 100% machined, heat treated, and finished in ATI’s Baltimore facility.

ATI has earned a solid reputation for building the finest and strongest racing transmissions and components in the business, and with 2000 HP max holding capability (weight limited), this new shaft is no exception.

Part number 705311 is priced at just $349.95 and are in stock ready to ship!


  • Solid design for center lube transmissions only
  • No lube holes help eliminate premature fractures
  • Correct length, no modifications are required for fitment
  • 75% stronger than 4340 and 20% stronger than 300M
  • Zero failures during in-vehicle testing
  • Proven design derived from our extreme High HP 400 and PG shafts
  • 30 years of input shaft manufacturing experience

About the author

Chris McWilliams

Chris McWilliams grew up watching his dad race go-karts around his Southern Indiana home and started racing junior dragsters when he was 10 years old. Chris drove a UMP Mini Stock for two seasons until he totaled his racecar in an accident at Western Kentucky Speedway. He is currently a college student at Oakland City University working on a degree to pay the bills for his dirt racing addiction.
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