ACT 1994 Subaru Impreza Alignment Tool

24-Spline Clutch Alignment Tool for Subaru, Scion, and Toyota FA20 Applications

The ACT AT90 is a plastic clutch alignment tool designed to correctly center the clutch disc relative to the pilot bearing during clutch installation across a wide range of Subaru, Scion, Toyota, BMW, Ford, Lexus, and Saab applications. Using a clutch alignment tool is not optional: without one, the clutch disc will not be centered when you attempt to slide the transmission input shaft into engagement, making it impossible to complete the installation without damaging the disc or pilot bearing. The AT90 is a 24-spline tool with a 1-inch input shaft diameter that fits the FA20-powered FR-S, BRZ, and 86 platform as well as many other Subaru and Toyota applications listed below. It is lightweight plastic and inexpensive, making it practical to have one on hand any time clutch work is performed.

Key Features

• 24-spline design for correct disc centering on 1-inch spline bore clutch discs
• Fits a wide range of Subaru, Toyota, Scion, BMW, Ford, Lexus, and Saab applications
• Lightweight plastic construction for easy handling during installation
• Required for proper clutch disc alignment during pressure plate torquing
• Inexpensive essential tool for any clutch job on covered applications

Specifications

What's Included

• 1 x ACT AT90 clutch alignment tool

Related Parts on Our Site

• ACT 3000504 — Perf Street Sprung Disc for FR-S / BRZ / 86
• ACT ACT3000506 — Performance Street Sprung Disc for FR-S / BRZ / 86
• ACT 6224218-1 — 6 Pad Sprung Race Disc for FR-S / BRZ / 86
• ACT RB004 — Release Bearing for FR-S / BRZ / 86

About ACT

Advanced Clutch Technology (ACT) has designed and manufactured performance clutch components and installation tools in the USA since 1991. ACT's alignment tools are engineered to match the exact spline and diameter specifications of their clutch discs, ensuring proper centering and trouble-free transmission reinstallation across all supported platforms.

Frequently Asked Questions

The ACT AT90 is a 24-spline plastic clutch alignment tool with a 1-inch input shaft diameter. It is used to center the clutch disc in the pressure plate and pilot bearing during installation on Subaru, Toyota, Scion, BMW, and other covered applications so the transmission input shaft can engage cleanly during reinstallation.

During pressure plate installation, the clutch disc must be held centered relative to the pilot bearing. Without an alignment tool, the disc sits off-center, and the transmission input shaft cannot engage the spline when you attempt to reinstall the gearbox. Forcing the shaft in can damage the disc hub, pilot bearing, and input shaft seal.

Yes. The AT90 is a correct fitment tool for the FA20-powered BRZ, FR-S, and 86 platform using 24-spline, 1-inch bore clutch discs. It works with both ACT clutch discs and other 24-spline discs using the same hub specifications.

Yes. The AT90 is a reusable plastic alignment tool. Store it with your other clutch hardware and use it again on future clutch jobs on any covered application.

The AT90 aligns by spline count and pilot bearing diameter, not by brand. Any 24-spline clutch disc with a 1-inch bore on a supported application will align correctly with the AT90, regardless of manufacturer.

Without proper alignment, the disc hub will be off-center when you torque the pressure plate. When you attempt to reinstall the transmission, the input shaft will not slide through the disc hub and pilot bearing, and forcing it risks bending or cracking the hub, damaging the pilot bearing bore, or scoring the input shaft.

The AT90 has broad fitment coverage across many Subaru platforms including Impreza WRX and STI, Legacy, Forester, and Outback variants, as well as Toyota, Scion, BMW, Ford Courier, Lexus, and Saab applications. Refer to the full fitment list to confirm your specific application.

No. Use the tool dry. Apply a small amount of high-temp grease only to the pilot bearing itself and the transmission input shaft spline per your clutch manufacturer's instructions. Excess grease in the disc friction surface area will contaminate the clutch material and reduce service life.

Installation Instructions

1. Insert the ACT AT90 through the center of the clutch disc hub so the splines engage.
2. Position the disc against the flywheel and insert the tip of the alignment tool into the pilot bearing to center the assembly.
3. Hold the disc steady while positioning the pressure plate over the disc and flywheel dowel pins.
4. Hand-thread the pressure plate bolts to secure the assembly without moving the disc.
5. Torque the pressure plate bolts to the factory specification in a star pattern, maintaining disc alignment throughout.
6. Slide the AT90 out of the disc hub and pilot bearing. The disc should remain centered.
7. Reinstall the release bearing and transmission per factory procedure.