PUMP BOLT WASHERS (8) (TH400, TH350)

The Coan Racing COA‑22157 Pump Bolt Washers (set of 8) are precision-engineered components designed to secure the oil pump assembly in Turbo-Hydramatic 400 and 350 transmissions. These washers are manufactured in the USA to Coan’s high-performance standards, ensuring consistent preload and preventing loosening under extreme pressure and vibration. By distributing the clamping force of the pump bolts evenly, the COA‑22157 kit helps maintain a tight, leak-free seal at the pump-to-case interface, an essential detail for reliability in high-stress driving conditions.

Ideal for rebuilds or performance upgrades, these washers offer a durable and cost-effective solution to preserve hydraulic integrity and support optimal fluid pressure in demanding transmission environments.