Maryland dieselnick
Member
The valve body area of the case often deflects causing leaks ( low/no apply pressure) or cross channeling.
There is a substantial gap between the center support and case. Sonnax offers a shim to fill that gap.
It must be carefully filed to fit your gap. Valve body surface must be checked with a straight edge.
Center support bolts should never be finally torqued until final assembly of the bore and the transmission is in the horizontal position. MANY disregard this a problem especially when not using a shim because the tension of the overdrive spring torques against the center support and the feed bolts.
There is a substantial gap between the center support and case. Sonnax offers a shim to fill that gap.
It must be carefully filed to fit your gap. Valve body surface must be checked with a straight edge.
Center support bolts should never be finally torqued until final assembly of the bore and the transmission is in the horizontal position. MANY disregard this a problem especially when not using a shim because the tension of the overdrive spring torques against the center support and the feed bolts.