F 150 2WD Pickup V8-4.6L CNG SOHC VIN 9 (1997)
2. Identify the (A) third gear synchronizer blocking ring and the (B) first, second and fourth synchronizer blocking ring.
3. Inspect the (A) synchronizer blocking rings for proper contact with the (B) cone surface of the gears.
4. Inspect the (A) synchronizer blocking rings for wear on the (B) gear.
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If clearance is less than specification, replace the ring or gear.
