Sonnax Case Saver Retainer TH400 4L80E M40 3L80 MT1

Sonnax Case Saver Retainer for TH400 & '98-Earlier 4L80-E The Sonnax case saver retainer 34762-10 is the only intermediate clutch retaining ring case saver that allows for the retention of the intermediate band in GM TH400 and '98-earlier 4L80-E transmissions. This innovative design fits over the intermediate band anchor lug inside the case and extends rearward to support the intermediate clutch backing plate retaining ring, preventing case lug blowout. Unlike other case saver designs that require the elimination of the intermediate band—common in drag racing applications—the Sonnax retainer offers case lug protection while still allowing the intermediate band to be installed. Key Features: Protects case lugs from blowout Salvages cases with one or two blown lugs Compatible with or without the intermediate band Note: For '99-later 4L80-E applications, see instructions for proper identification. Requires modifications to OE-style intermediate clutch backing plates without a full c