A broken clutch pressure control(CPC) valve spring
This replacement spring has a larger wire diameter, thereby decreasing total spring stress by more than 25%.
1996-1999 Honda Civic, Del Sol, CR-V, .480" long, for adjustable CPC valve
Common problems in the 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 has developed a replacement spring 88894 that has a wire diameter larger than the OE design. This significantly reduces the stress on the spring, preventing future breakage.
Early Design = .260" spring pocket; .480" long spring
Late Design = .390" spring pocket; .625" long spring
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