Sonnax 700R4-LB1 Line Pressure Booster Kit for GM 4L60 700-R4 200-4R Transmissions

The Sonnax 700R4-LB1 line pressure booster kit fits GM 4L60 (700-R4) and 200-4R transmissions. This hydraulic line pressure booster kit contains stronger pressure regulator springs and large ratio boost valves designed to work together to provide progressive pressure increases as driving conditions become more demanding.

Key Features:

• Pressure regulator springs are approximately 10% stronger than OE and more conservative in impact than other aftermarket kit springs
• Large ratio boost valves provide higher pressure incrementally and when it is needed the most
• Includes high ratio boost valve with O-rings and progressive rate line pressure regulator spring
• Achieve shorter shifts and increased torque capacity without creating low-speed harshness
• All the benefits of increased line pressure without overloading the pump at idle
• Drop-in Zip Valve installation for quick and easy setup

The combination of these springs and valves gives you the best of both worlds: a modest pressure increase at the low end, with a high-end pressure that is equal to or greater than that of other aftermarket kit springs. The large ratio boost valves and stronger pressure regulator springs work together to offer smooth engagements and lower load on the pump at idle, but a greater increase in pressure as the transmission is worked harder.

Applications: Compatible with GM 700R4, 4L60, 700-R4, TH700-R4, and 200-4R transmissions from 1982-1993. Also known as MD8, THM700R4, or THM700-R4.