The 700R4 Hydraulic Lock-up Package allows you to engage lock-up automatically without a computer! No toggle-switch or vacuum switch necessary. Package contains hydraulic valves and five custom calibrated springs so you can vary the lock-up speeds.

Kit contains the following:
- Steel lock-up valve
- Aluminum lock-up valve sleeve
- Steel lock-up boost-valve
- 5 custom calibrated springs
- Detailed installation instructions

*Note, this kit does not contain new pan gasket.