Common problems in the Honda/Acura A4RA, B4RA and M4RA transmissions are harsh upshifts, downshifts and Forward engagements, while Reverse engagement is fine. These problems can be caused by a broken CPC (clutch pressure control) valve spring. The spring is located in the secondary valve body and is not available from Honda. Sonnax CPC valve spring 88894 has a wire diameter larger than the OE design. This significantly reduces the stress on the spring, preventing future breakage.

More From This Category

Sonnax Replacement Seal, GM, For 77805-K, 77805E-K

Sonnax Replacement Seal, GM, For 77805-K, 77805E-K

$23.48

Motive Gear Axle Shaft, 1541 Manganese, 5x4.5 in. Bolt Pattern, 32.25 in. Length, 28SPL, ForD AEROSTAR 1986–1997, Each

Motive Gear Axle Shaft, 1541 Manganese, 5x4.5 in. Bolt Pattern, 32.25 in. Length, 28SPL, ForD AEROSTAR 1986–1997, Each

$229.85

Motive Gear Axle Shaft, 28SPL, 45.4 in. Length, 1.27 Diameter, For CHEVROLET BLAZER 1987–1989, Kit

Motive Gear Axle Shaft, 28SPL, 45.4 in. Length, 1.27 Diameter, For CHEVROLET BLAZER 1987–1989, Kit

$646.66

Sonnax Extended Length Forward Band Servo Pin Kit, GM 4T60-E, 4T65-E, Each

Sonnax Extended Length Forward Band Servo Pin Kit, GM 4T60-E, 4T65-E, Each

$58.49

Motive Gear Axle Shaft, 1541 Manganese, 6x4.5 in. Bolt Pattern, 30.071 in. Length, 31SPL, For DODGE DAKOTA 1998–2004, Each

Motive Gear Axle Shaft, 1541 Manganese, 6x4.5 in. Bolt Pattern, 30.071 in. Length, 31SPL, For DODGE DAKOTA 1998–2004, Each

$257.83