May 21, 2013
Constant oscillation of the converter clutch regulator valve creates wear in the valve body bore. Also, the small plug separating this regulator valve and the inboard coast clutch valve oscillates due to opposing spring and oil forces, creating bore wear and a path for oil pressure to exhaust. Excessive wear at these areas prevents regulated line pressure from supplying the converter clutch with apply and release pressures, causing converter complaints and setting 628 and 1741 codes.
Sonnax offers a highly wear resistant aluminum sleeve, 37947-09K, that mates with the OE anodized aluminum valve or our 37947-38 replacement valve. Use of this sleeve allows the valve bore to be oversized, and the hydraulic integrity of the bore to be restored. The sleeve design also incorporates the middle end plug, preventing future bore wear at this location. An O-ringed outboard end plug is also supplied to maintain proper balance line pressure and ensure the proper stroking of the regulator valve.
May 21, 2013
September 21, 2005
Bob Warnke
September 30, 2005
Gregg Nader