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Switch Valve, A518/A618/48RE Prevents Lock-Up Shudder

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Part # 12741A-1
Type:
Switch, valve
Transmissions:
30RH, 32RH, 37RH, 40RH, 42RE, 42RH, 44RE, 46RE, 46RH, 47RE, 47RH, 48RE, A618, A998, TF8
Data as of:
2026-10-17

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Cross-reference numbers

NumberSystemStatus
12741A-1WIT✓ catalog

Where it fits

DiagramPositionTransmission page
30RH741—
42RE74142RE
46RE741—
TF8741TF8
Other parts in 30RH position 741:
  • S127414 Bracket, A500 Holds Transducer (#415 Sensor) To Valve Body (4th Design)(Metal, 3 Bolt Holes) 2000-Up
  • S127417 Neutral Safety Back-Up Insulator, A727/A518 (This Replaces The Plastic Piece On The Manual Shaft Lever (Rooster Comb)…
  • 12741A5 Check Ball, A727/A518/A618/48RE (11/32”) (Torlon)
  • S12741AOS1 Switch Valve, A500 (Oversize) (Sonnax) Must Use Reamer T-22771A-TL13
  • S12741C4 Retainers, A500 TCC Boost Valve Spring (Sonnax) (5 Pieces)
  • 12741CA4 Plate, A500 TCC Boost Valve (Superior) With Retainer To Hold Spring In
  • 12741CK Spring Kit, A727 Lock-Up Delay (Spring & Plate)
  • S12741D6K Plug Kit, A727/A518/A618/48RE Valve Body Governor Bore…
  • S12741M1 Manual Valve, A727/A518/618/48RE (Allows Converter Charge In Park)(Sonnax)
  • S12741NCK Sure Cure kit, A500 (Sonnax)
  • and 5 more
Other parts in 42RE position 741:
  • S127414 Bracket, A500 Holds Transducer (#415 Sensor) To Valve Body (4th Design)(Metal, 3 Bolt Holes) 2000-Up
  • S127417 Neutral Safety Back-Up Insulator, A727/A518 (This Replaces The Plastic Piece On The Manual Shaft Lever (Rooster Comb)…
  • 12741A5 Check Ball, A727/A518/A618/48RE (11/32”) (Torlon)
  • S12741AOS1 Switch Valve, A500 (Oversize) (Sonnax) Must Use Reamer T-22771A-TL13
  • S12741C4 Retainers, A500 TCC Boost Valve Spring (Sonnax) (5 Pieces)
  • 12741CA4 Plate, A500 TCC Boost Valve (Superior) With Retainer To Hold Spring In
  • 12741CK Spring Kit, A727 Lock-Up Delay (Spring & Plate)
  • S12741D6K Plug Kit, A727/A518/A618/48RE Valve Body Governor Bore…
  • S12741M1 Manual Valve, A727/A518/618/48RE (Allows Converter Charge In Park)(Sonnax)
  • S12741NCK Sure Cure kit, A500 (Sonnax)
  • and 5 more
Other parts in 46RE position 741:
  • S127414 Bracket, A500 Holds Transducer (#415 Sensor) To Valve Body (4th Design)(Metal, 3 Bolt Holes) 2000-Up
  • S127417 Neutral Safety Back-Up Insulator, A727/A518 (This Replaces The Plastic Piece On The Manual Shaft Lever (Rooster Comb)…
  • 12741A5 Check Ball, A727/A518/A618/48RE (11/32”) (Torlon)
  • S12741AOS1 Switch Valve, A500 (Oversize) (Sonnax) Must Use Reamer T-22771A-TL13
  • S12741C4 Retainers, A500 TCC Boost Valve Spring (Sonnax) (5 Pieces)
  • 12741CA4 Plate, A500 TCC Boost Valve (Superior) With Retainer To Hold Spring In
  • 12741CK Spring Kit, A727 Lock-Up Delay (Spring & Plate)
  • S12741D6K Plug Kit, A727/A518/A618/48RE Valve Body Governor Bore…
  • S12741M1 Manual Valve, A727/A518/618/48RE (Allows Converter Charge In Park)(Sonnax)
  • S12741NHPK Throttle Vlave Kit, A727/A518/A618/48RE (High Performance) (Sonnax)
  • and 6 more
Other parts in TF8 position 741:
  • S127414 Bracket, A500 Holds Transducer (#415 Sensor) To Valve Body (4th Design)(Metal, 3 Bolt Holes) 2000-Up
  • S127417 Neutral Safety Back-Up Insulator, A727/A518 (This Replaces The Plastic Piece On The Manual Shaft Lever (Rooster Comb)…
  • 12741A5 Check Ball, A727/A518/A618/48RE (11/32”) (Torlon)
  • S12741AOS1 Switch Valve, A500 (Oversize) (Sonnax) Must Use Reamer T-22771A-TL13
  • S12741C4 Retainers, A500 TCC Boost Valve Spring (Sonnax) (5 Pieces)
  • 12741CA4 Plate, A500 TCC Boost Valve (Superior) With Retainer To Hold Spring In
  • 12741CK Spring Kit, A727 Lock-Up Delay (Spring & Plate)
  • S12741D6K Plug Kit, A727/A518/A618/48RE Valve Body Governor Bore…
  • S12741M1 Manual Valve, A727/A518/618/48RE (Allows Converter Charge In Park)(Sonnax)
  • S12741NHPK Throttle Vlave Kit, A727/A518/A618/48RE (High Performance) (Sonnax)
  • and 6 more
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