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 complement of case lugs. No modifications needed when used with the Sonnax heavy-duty intermediate clutch backing plate 34144HD-01.

Transmissions: TH400 (M40,3L80) 1965-UP, 4L80E (MT1) 1991-1998

Vehicle

BENTLEY
Corniche 1971-1996 3 SP
Eight 1984-1992 3 sp V8, 6.75L
Mulsanne 1980-1992 3 SP V8, 6.75L
T Series 1967-1980 3 SP
Turbo R 1985-1994 3 SP V8, 6.75L
BUICK
Century 1973-1977 3 SP
Electra, LeSabre 1974-1981 3 SP
Regal 1969-1981 3 SP
Riviera 1965-1978 3 SP
Special 1967-1972 3 SP
CADILLAC
DeVille 1973-1984 3 SP
Fleetwood 1974-1984 3 SP
Seville 1976-1979 3 SP
CHEVROLET
Camaro 1967-1974 3 SP
Chevelle 1967-1975 3 SP
CK Blazer 1978-1979 3 SP
Corvette 1968-1977 3 SP
Nova 1968-1970 3 SP
Suburban 2500 1987-1990 3 SP
Truck (C/K series) 1966-1990 3 SP
Van (full size) 1975-1990 3 SP
C/K, PICK-UP 1500, C/K, PICK-UP 2500 1995-1998 4 SP R/4WD V8 5.0L 5.3L 5.7L 6.0L 7.4L 6.5L DIESEL
SILVERADO 1500HD, SILVERADO 1500SS 1998 4 SP R/4WD V8 6.0L 6.5L
SUBURBAN 1500 1995-2008 4 SP R/4WD V8 6.0L 6.5L DIESEL 7.4L
TAHOE 1995-1998 4 SP R/4WD V8 6.0L 8.1L 6.5L DIESEL
VAN FULL SIZE 2500 1996-1998 4 SP R/4WD V6 4.3L V8 4.8L 5.7L 6.0L 7.4L 8.1L 6.5L 6.6L DIESEL
VAN FULL SIZE 3500 1995-1998 4 SP RWD V6 4.3L V8 4.8L 5.7L 6.0L 7.4L 8.1L 6.5L 6.6L DIESEL
GMC
Jimmy 1978-1979 3 SP
Suburban 2500 1987-1990 3 SP
Truck (C/K series) 1966-1990 3 SP
Van 1975-1988 3 SP
SIERRA DENALI 1998 4 SP R/4WD V8 6.0L 6.5L
ISUZU
TRUCK NPR, W4 1987-1998 4 SP RWD V8 5.7L 6.0L
JAGUAR
XJ12 1973-1993 3 SP V12 5.3L,
XJS 1976-1992 3 SP V12
XJ12/XJR/XJS 1994-1997 4 SP RWD L6 4.0L V12 6.0L
ROLLS ROYCE
Bentley 1967-1998 3 SP 
Carnargue 1975-1998 3 SP V8, 6.75L
Corniche 1967-1987 3 SP
Silver Shadow, Silver 1968-1990 3 SP
Silver Sprint 1980-1990 3 SP
T Series 1968-1972 3 SP

Alternate Words: Automatic Transmission, Reprogramming, Improvement , Correction, Shift , Valve Body Rebuild Kit, 34762-10