SunCoast Transgo Allison Boost Modifier Valve (Hot Rod Allison Lockup Kit)
These TransGo automatic transmission fluid control valves are designed to reduce main line pressure to the torque converter clutch. The lower pressure will allow your transmission to operate more efficiently under no-load conditions.

Fits 2001-2003 Allison 1000-2000 Pump assembly

Includes A1-LU-BST Hot Rod Allison Lock Up Valve assembly
A1-LU-BST Hot Rod Allison Lock Up Valve addresses Torque Converter slip under Heavy Duty/Race conditions. Significantly increases Lock Up oil pressure with (2) optional springs.
***We recommend this part for Race use only***

Installation recommendation: Experienced technician
Transmission removal necessary: Yes