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 Rear (Forward) Clutch Inner Lip Seal, Chrysler, 46/47Re/Rh & 48RE, 5/Bg

Sonnax Rear (Forward) Clutch Inner Lip Seal, Chrysler, 46/47Re/Rh & 48RE, 5/Bg

$44.25

Motive Gear Gear Install Kit, For Chrysler 7.25, Kit

Motive Gear Gear Install Kit, For Chrysler 7.25, Kit

$15.63

TCI Input Shaft, Hardened, Vaccu Melt 300, 1.76 Carrier, Stock Spline, 12.875 in. Length, GM, Powerglide, Each

TCI Input Shaft, Hardened, Vaccu Melt 300, 1.76 Carrier, Stock Spline, 12.875 in. Length, GM, Powerglide, Each

$418.04

Motive Gear Axle Shaft, 1541 Manganese, 5x4.5 in. Bolt Pattern, 32.5625 in. Length, 27SPL, For DODGE B150 1985–1994, Each

Motive Gear Axle Shaft, 1541 Manganese, 5x4.5 in. Bolt Pattern, 32.5625 in. Length, 27SPL, For DODGE B150 1985–1994, Each

$313.84

Motive Gear Axle Shaft, 1541 Manganese, 5x4.5 in. Bolt Pattern, 27.25 in. Length, 28SPL, ForD RANGER 1999–2009, Each

Motive Gear Axle Shaft, 1541 Manganese, 5x4.5 in. Bolt Pattern, 27.25 in. Length, 28SPL, ForD RANGER 1999–2009, Each

$176.28