Product Overview
4R44E, 4R55E, 5R44E, 5R55E Boost Valve & Sleeve Kit (OEM Ratio) N.I. S56741F (Sonnax 37947-01K)
4R44E, 4R55E, 5R44E, 5R55E Boost Valve & Sleeve Kit (Increased Ratio)(1995-UP) N.I.S56741FA (Sonnax 37947-03K)
4R44E, 4R55E, 5R55E Valve Body Components-Boost Valve Kit, w/ Sleeve(1995-Up) 56741F (37947-01K)
4R44E, 4R55E, 5R44E, Sleeve Kit, Pressure Regulator Valve (req T-37947-TL5) (1995-Up) 56741P-2K (37947-05K)(Sonnax)
4R44E, 4R55E, 5R44E, 5R55E Pressure Regulator Sleeve Kit (T-37947-TL5 Required)(1995-up) S56741P-2K (Sonnax 37947-05K)
4R44E, 4R55E, 5R44E, 5R55E TCC Modulator Sleeve Kit (T-37947-TL5 Required) (1995-up) S56741C-2K (Sonnax 37947-07K)