$1,876.27 - $2,156.52
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1970 Chevy G-Series
Fits Following Model(s):
  • THM400 Transmission
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    Product Details

    ATI Performance

    Chevy G-Series THM400 Transmission 1970-1987, SuperCase® Lightweight Transmission Case by ATI Performance®. With Sensor Ports. The SuperCase is an SFI certified transmission case for Powerglide and Turbo 400 transmissions. The case, bellhousing, and tailhousing are cast from 356T6 cast aluminum. Developed to eliminate all weak points found in the original GM transmission cases, the rugged ATI SuperCase and bell housing are SFI approved for competition, and feature a steel safety inner liner that weighs only 29 ounces—eliminating the need for any external shields. In addition, the SuperCase features a removable bell housing that bolts directly to the transmission case instead of the pump bolt locations, and has been engineered to accept all internal Powerglide or Turbo 400 components.

    ATI Performance - AboutATI Performance - FAQ

    Specifications:

    Transmission Case Material: Aluminum
    Transmission Case Finish: Natural
    Adjustable Trans-Brake Release: No
    Flexplate Shield Built In: Yes
    Flexplate Shield Rating: SFI 30.1
    Transmission Shield Built In: Yes
    Transmission Shield Rating: SFI 4.1
    Quantity: 1-Piece

    Features:

    • Heavy-duty 356-T6 cast aluminum case meeting SFI 4.1 specs with no internal or ternal shield needed
    • Made in the USA and machined in-house at ATI using only two fixturing set-ups to provide optimum accuracy
    • Accepts OEM pans, extension housings and 99% of all stock internal components
    • CNC machined minimum depth valve body passages yield extremely fast transbrake releases and quicker shift times
    • Dual pattern bell mount accepts ATI Super Bells for many engines and other bells on the market
    • Features additional center support lugs to provide additional 2nd gear strength, with a modified pressure plate supplied
    • Provisions for three extra bolts added to help secure the center support and intermediate pressure plate
    • Increased thickness extension housing/output shaft bearing area provides extra support for 4x4 units
    • Roller bearing for output shaft (bushing available by request)
    • Cooler lines are 1/4" NPT to accept PG quick-connect lines and other popular cooler hoses and fittings

    ATI Performance Products is a family owned and operated company with over 50 years of experience in manufacturing top-grade race products, including competition transmissions, flexplates, adapter kits and internal transmission components. Located in Maryland, ATI Performance® produces a variety of true track-tested and proven products manufactured under the strictest quality control in one of the most advanced manufacturing facilities in the industry. ATI proudly holds over a dozen of U.S. Government patents.

    Warranty Information

    LIMITED WARRANTY

    ATI PERFORMANCE PRODUCTS, INC. (ATI) warrants to the Original Retail Purchaser that all products manufactured by ATI and that are purchased in the United States or its territories from ATI or Authorized ATI Dealers, will be free from defects in material and workmanship. This warranty will extend for a period of 90 days from the date of the original invoice, unless otherwise agreed. ATI will repair or replace, at their option, any part, assembly or portion thereof which ATI’s examination discloses to be defective. Transportation costs are not included. Disassembly by anyone other than an authorized ATI Representative voids all warranties.

    THIS WARRANTY CONSTITUTES THE FULL AND FINAL ATI LIMITED WARRANTY. THERE IS NO OTHER EXPRESS WARRANTY EXCEPT AS STATED HEREIN. ANY AND ALL IMPLIED WARRANTIES OF FITNESS AND MERCHANTABILITY ARE LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY. THE LIABILITIES OF ATI ARE LIMITED SOLELY AND EXCLUSIVELY TO REPLACEMENT AS STATED HEREIN AND DO NOT INCLUDE ANY LIABILITY FOR ANY INCIDENTAL, CONSEQUENTIAL, OR OTHER DAMAGES OF ANY KIND WHATSOEVER, WHETHER ANY CLAIM IS BASED UPON THEORIES OF CONTRACT, NEGLIGENCE OR TORT. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.

    Purchaser understands and agrees that no officer, director, employee or salesman of ATI or any vendor, dealer, or distributor has any authority to make any statements contrary to the terms of this Limited Warranty. ATI disavows any statements contrary to what is above written. This Limited Warranty shall be governed by and in accordance with the laws of the State of Maryland and should litigation occur, it shall be exclusively in the Baltimore County Court System or in the Federal Court System which encompasses Baltimore County, Maryland.

    Magnuson-Moss Warranty Act:
    Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More
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