SonnaxPiston
Part #: S12912 $54.22
Call for Availability: +1 (833) 363-1938
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Description & Specs
Many Chrysler A904 and 42H/RE transmissions experience rear servo piston sticking/breakage, pin bore wear and reverse band slippage. The servo piston has a tendency to get cocked in the bore, inhibiting band apply. The high reverse line pressure continues to apply against a cocked piston, causing piston breakage. The bore of the piston also wears from side loading, resulting in insufficient band apply pressure. Sonnax billet aluminum rear servo piston 22912A addresses these problems. Modified seal ridges prevent piston from sticking in case bore Billet aluminum won’t crack like OE cast piston 2.540" O.D.
Piston; Rear Servo 2.545" Outer Diameter
| Name | Specs |
|---|---|
| Package UOM | Each |
| Quantity Per UOM | 1 |
| Weight | 0.83 |
| Weight UOM | Pounds |
Transmissions
| Name | Years |
|---|---|
| A904 (30RH) | 1975 - 1993 |
| A998 (31RH) | 1981 - 1993 |
| A999 (32RH) | 1979 - 1993 |
| 42RE | 1993 - 2004 |
| 42RH | 1988 - 1997 |
| 44RE | 1994 - 2000 |
| A904 | 1962 - 1987 |
| A500 | 1988 - 1996 |
| 32RH | 1992 - 2003 |
| 30RH | 1994 - 2002 |
| 31RH | 1994 - 1994 |
Vehicle Fitment
| Years | Vehicle | Drive Types |
|---|---|---|
| 1979 - 1983 | American Motors Spirit | RWD |
| 1975 - 1980 | American Motors Pacer | RWD |
| 1972 - 1978 | American Motors Matador | RWD |
| 1972 - 1974 | American Motors Javelin | RWD |
| 1973 - 1977 | American Motors Hornet | RWD |
| 1972 - 1978 | American Motors Gremlin | RWD |
| 1980 - 1988 | American Motors Eagle | 4WD |
| 1978 - 1983 | American Motors Concord | RWD |
| 1978 - 1980 | American Motors AMX | RWD |
| 1978 - 1981 | Chrysler Town & Country | RWD |
| 1974 - 1974 | Chrysler Newport | RWD |
| 1975 - 1982 | Chrysler New Yorker | RWD |
| 1977 - 1981 | Chrysler LeBaron | RWD |
| 1962 - 1983 | Chrysler Imperial | RWD |
| 1983 - 1989 | Chrysler Fifth Avenue | RWD |
| 1981 - 1993 | Dodge W350 | 4WD |
| 1965 - 1967 | Dodge W300 Series | 4WD |
| 1968 - 1974 | Dodge W300 Pickup | 4WD |
| 1981 - 1993 | Dodge W250 | 4WD |
| 1965 - 1967 | Dodge W200 Series | 4WD |
| 1968 - 1974 | Dodge W200 Pickup | 4WD |
| 1981 - 1993 | Dodge W150 | 4WD |
| 1965 - 1967 | Dodge W100 Series | 4WD |
| 1968 - 1974 | Dodge W100 Pickup | 4WD |
| 1984 - 1989 | Dodge W100 | 4WD |
| 1979 - 1981 | Dodge St. Regis | RWD |
| 1975 - 1977 | Dodge Royal Monaco | RWD |
| 1974 - 1990 | Dodge Ramcharger | RWD, 4WD |
| 1983 - 1993 | Dodge Ram 50 | RWD, 4WD |
| 1999 - 2003 | Dodge Ram 1500 Van | RWD |
| 1994 - 2001 | Dodge Ram 1500 | RWD, 4WD |
| 1983 - 1986 | Dodge Power Ram 50 | 4WD |
| 1965 - 1973 | Dodge Polara | RWD |
| 1973 - 1974 | Dodge P300 Van | RWD |
| 1965 - 1972 | Dodge P300 | RWD |
| 1973 - 1974 | Dodge P200 Van | RWD |
| 1965 - 1972 | Dodge P200 | RWD |
| 1965 - 1966 | Dodge P100 | RWD |
| 1973 - 1978 | Dodge Monaco | RWD |
| 1980 - 1983 | Dodge Mirada | RWD |
| 1978 - 1979 | Dodge Magnum | RWD |
| 1998 - 2000 | Dodge Durango | RWD, 4WD |
| 1977 - 1989 | Dodge Diplomat | RWD |
| 1984 - 1984 | Dodge Daytona | FWD |
| 1965 - 1976 | Dodge Dart | RWD |
| 1987 - 2003 | Dodge Dakota | RWD, 4WD |
| 1979 - 1982 | Dodge D50 | RWD, 4WD |
| 1981 - 1993 | Dodge D350 | RWD |
| 1965 - 1967 | Dodge D300 Series | RWD |
| 1968 - 1974 | Dodge D300 Pickup | RWD |
| 1981 - 1993 | Dodge D250 | RWD |
| 1965 - 1967 | Dodge D200 Series | RWD |
| 1968 - 1974 | Dodge D200 Pickup | RWD |
| 1981 - 1993 | Dodge D150 | RWD |
| 1965 - 1967 | Dodge D100 Series | RWD |
| 1968 - 1974 | Dodge D100 Pickup | RWD |
| 1988 - 1989 | Dodge D100 | RWD |
| 1970 - 1976 | Dodge Coronet | RWD |
| 1967 - 1978 | Dodge Charger | RWD |
| 1970 - 1983 | Dodge Challenger | RWD |
| 1973 - 1980 | Dodge CB300 | RWD |
| 1981 - 1994 | Dodge B350 | RWD |
| 1971 - 1974 | Dodge B300 Van | RWD |
| 1975 - 1980 | Dodge B300 | RWD |
| 1995 - 1998 | Dodge B2500 | RWD |
| 1981 - 1994 | Dodge B250 | RWD |
| 1971 - 1974 | Dodge B200 Van | RWD |
| 1975 - 1980 | Dodge B200 | RWD |
| 1995 - 1998 | Dodge B1500 | RWD |
| 1981 - 1994 | Dodge B150 | RWD |
| 1971 - 1974 | Dodge B100 Van | RWD |
| 1976 - 1980 | Dodge Aspen | RWD |
| 1967 - 1970 | Dodge A100 Pickup | RWD |
| 1987 - 2002 | Jeep Wrangler | 4WD |
| 1980 - 1986 | Jeep Wagoneer | 4WD |
| 1981 - 1985 | Jeep Scrambler | 4WD |
| 1980 - 1986 | Jeep J20 | 4WD |
| 1980 - 1986 | Jeep J10 | 4WD |
| 1984 - 1986 | Jeep Grand Wagoneer | 4WD |
| 1993 - 2004 | Jeep Grand Cherokee | AWD, RWD, 4WD |
| 1980 - 1983 | Jeep DJ5 | RWD |
| 1986 - 1986 | Jeep Comanche | RWD, 4WD |
| 1980 - 1986 | Jeep CJ7 | 4WD |
| 1980 - 1983 | Jeep CJ5 | 4WD |
| 1980 - 2000 | Jeep Cherokee | RWD, 4WD |
| 1983 - 1986 | Mitsubishi Montero | 4WD |
| 1983 - 1996 | Mitsubishi Mighty Max | RWD, 4WD |
| 1976 - 1980 | Plymouth Volare | RWD |
| 1965 - 1976 | Plymouth Valiant | RWD |
| 1975 - 1981 | Plymouth Trailduster | RWD, 4WD |
| 1971 - 1983 | Plymouth Scamp | FWD, RWD |
| 1965 - 1974 | Plymouth Satellite | RWD |
| 1972 - 1975 | Plymouth Road Runner | RWD |
| 1982 - 1983 | Plymouth PB350 | RWD |
| 1974 - 1974 | Plymouth PB300 Van | RWD |
| 1982 - 1983 | Plymouth PB250 | RWD |
| 1974 - 1974 | Plymouth PB200 Van | RWD |
| 1982 - 1983 | Plymouth PB150 | RWD |
| 1974 - 1974 | Plymouth PB100 Van | RWD |
| 1972 - 1989 | Plymouth Gran Fury | RWD |
| 1965 - 1978 | Plymouth Fury | RWD |
| 1970 - 1976 | Plymouth Duster | RWD |
| 1970 - 1974 | Plymouth Cuda | RWD |
| 1965 - 1970 | Plymouth Belvedere | RWD |
| 1965 - 1974 | Plymouth Barracuda | RWD |
| 1979 - 1982 | Plymouth Arrow Pickup | RWD |
| 1979 - 1980 | Plymouth Arrow | RWD |