The second issue the stock housing suffers from is the 4th clutch snap ring blowing out of its groove and destroying the housing
with 6 Liters ZF Lifeguard 6
Pinless design eliminates the possibility of pin bore leakage and the additional length stabilizes the piston to prevent piston cocking
See chart above for usage details and other boost valve options
Heavy duty snap ring for input drum
Sonnax 63741-01K Transmission Pressure Regulator Valve & Boost Valve Kit wholesale The second issue the stockManufacturer Part Number: 63741 01K Other Part Number: S63741PK Brand: Sonnax JR710E, JR711E, JR712E, RE5R05A, RE7R01A Oversized Pressure Regulator & Boost Valve Kit Part No. 63741 01K Also fits Hyundai Kia A5SR1 2 and Subaru 5EAT. Tooling: F 63741 TL VB FIX Transmissions listed above may exhibit insufficient line rise, resulting in delayed engagement, slipping in Reverse, poor shift quality, erratic line pressure and burnt clutches. These troubles