Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

3RD/4TH Blocker Rings






1. Install 3rd gear blocker ring to third gear with twisting motion to fully seat.

2. Install 4th gear blocker ring to input shaft with twisting motion to fully seat.

3. Measure gap between vertical faces of blocker teeth and clutch teeth. Nominal gap is 0.035-0.059 inch for new blocker rings.