Sonnax 4L60E 4L70E 4L65E Transmission, Line Pressure Booster Kit (Early Design)
Delivery time
You will receive your package in 2–5 business days within the contiguous U.S.
Delivery time
You will receive your package in 2–5 business days within the contiguous U.S.
Brand: Sonnax
Other Part Number: 4L60E-LB1, S74507FS, S74507TEK-1, NX-4L60E-LB1
Interchange Part Number: 4L60E-LB1, S74507FS, S74507TEK-1, NX-4L60E-LB1
Manufacturer Warranty: Unspecified Length
Fitment Type: Performance/Custom
Items Included: Line Pressure Booster Kit
Manufacturer Part Number: 4L60E-LB1
Superseded Part Number: 4L60E-LB1, S74507FS, S74507TEK-1, NX-4L60E-LB1
Universal Fitment: Yes
Performance Part: Yes
Line pressure booster kit 4L60E-LB1 fits early-style GM 4L60-E, 4L65-E and 4L70-E pumps. Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together to provide progressive pressure increases as driving conditions become more demanding.
Our 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. The combination of these springs and valves in a Sonnax kit 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.
Replaces early-style boost valve with "long" 1.907" sleeve. For applications with "short" 1.810" sleeve use 4L60E-LB2. See instructions for additional application information.
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