Input Shaft Shim Kit For M20 M21 M22 M23 Transmissions Pack Of Assorted Steel Shims And Wear Plates For Precise Clearance And Smooth Shifting Includes Steel Core Shims And Copper Or Aluminum Wear Plate Options

Input Shaft Shim Kit for M20-M23 Transmissions, 7-Pack
✔️ 7-piece steel core shims with wear plates for precise spacing

This input shaft shim kit is designed for M20, M21, M22, and M23 four-speed transmissions to fine-tune the spacing between the input shaft and the 3-4 synchronizer. It helps ensure smooth shifts and precise clearance during rebuilds and upgrades.

✅ 7-piece assortment for exact spacing between input shaft and synchronizer
✅ Steel core shims provide strong, durable clearance control
✅ Copper or aluminum wear plates protect rubbing surfaces
✅ Works with M20, M21, M22, M23 transmissions
✅ Carbon steel shims offer high strength with corrosion caveat

💡 What is an input shaft shim kit used for in manual transmissions?

The shims help set precise clearance between the input shaft and the 3-4 synchronizer, improving gear engagement and longevity.

- Handy for fine-tuning spacing in M20-M23 setups - Great for rebuilds to restore smooth shifting - Includes steel core shims or wear plates in copper/aluminum options