TransGo 8L90 Pulse Damper Tool Kit

TransGo 8L90 Pulse Damper Tool Kit

Even a little wear has an effect on solenoid pressure to the controlling clutch regulator valves. Flare, harsh, and erratic shifts all result from poor clutch control. A worn damper bore must be corrected to provide a smooth solenoid signal to the clutch regulator it serves. The smoother the solenoid signal, the more consistent and cleaner the shifts and torque converter clutch (TCC) performance.

The TransGo Pulse Damper Tool Kit is a quick and easy solution to repair even the most worn GM 8L45 and 8L90 pulse damper (accumulator) bores. Simply place the guide plate onto the valve body (refer to the instructions included with the kit), rotate until the two bolt holes align in the slots, then use the washers to protect the valve body and guide plate. Tighten down the bolts, remove the pin, and it’s ready to ream!

Includes

• Guide plate
• (4) Washers
• (2) Bolts with butterfly nuts
• Pulse damper pocket guide pin
• USA-made carbide reamer

Performance & Compatibility

Designed for GM 8L45 and 8L90 transmissions, this tool kit provides a reliable, long-lasting fix for worn pulse damper bores. By restoring proper clutch regulator valve function, the kit ensures smoother, cleaner shifts and consistent TCC operation, addressing common issues like flare, harsh, and erratic shifts.

Installation Guide