A common problem in GM 200-4R and 4L60 transmissions is burned bands and/or 3-4 clutches. This failure can be reduced by eliminating throttle boost oil leaka
Sonnax Reverse Boost Valve Kit - K77898
Sonnax AS5-05K Throttle Valve Cable Corrector Kit For Edelbrock - 700R — MaxxIndustries
77917-04K, TV BOOST VALVE KIT, 4L60E, 4L65E, 4L70E, 4L60/TH700-R4, TH200-4R
Sonnax Oversized Pressure Regulator Valve - 77917-07
Sonnax 4L60 (700-R4)
SONNAX 77805-K, 2004R 700R4 4L60E TCC Apply steel valve (Non PWM only)
Sonnax GM 200-4R Transmission
L2theW 700R4 Transmission Assembly - Part 5, The Input Housing, Raybestos 3-4 Z-Pak Clutch Setup
700R4 boost valve, Order On Line, 700R4 transmission parts
SONNAX
4L60E 4L65E Early style Boost Valve Kit .490 Inch Diameter, Increased Ratio, Factory Style.
Sonnax 77898E-3K, 4L60E 4L65E Early style Boost Valve Kit .490 Inch Diameter, Increased Ratio, Factory Style
SONNAX TRANSMISSION & VALVE BODY PARTS & TOOLS
Sonnax Boost Valve Kit - 36946-04K
Sonnax Transmission Company Automatic Transmission Boost Valves - Free Shipping on Orders Over $109 at Summit Racing