TransGo Automatic Transmission Vacuum Bypass Rebuild Kit - GM/Ford 399602 85 blocks with a two

85 blocks with a two piece rear main

2007-2013 Chevrolet Silverado 3500 HD LT Extended Cab Pickup

24 to 1 Ratio

6-Rib Smooth

The cover is doweled to the pump housing to assure alignment of shaft bores

TransGo Automatic Transmission Vacuum Bypass Rebuild Kit - GM/Ford 399602 85 blocks with a twoThe TransGo Vacuum Bypass Kit is for use on supercharged and turbocharged vehicles with transmissions that are equipped with a vacuum modulator. The bypass valve exhausts the boost pressure going to the modulator so the internal diaphragm does not get ruptured under engine boosted driving conditions. This vacuum bypass kit quickly and easily T's into the brake booster vacuum line or directly into the intake manifold. Product Description: Transmission