TF-BOOST - Dodge 46RE/47RE/48RE Transmission Transgo Boost Valve, Plug and Spring Shift Kit Dodge 46RE, 47RE and 48RE’s Addresses Delayed or low line response in ALL ranges but worse in Reverse. This is the main fix for the all too common reverse band burn up. An easy fix for VB’s with worn Boost Bores. No special tools required. Installation recommendation: Experienced technician Transmission removal necessary: No