Vibration, noise

Loose or damaged transaxle and engine mounts

Tighten or replace mounts

Inadequate shaft end play

Correct end play

Worn or damaged gears

Replace gears

Inadequate grade of oil

Replace with specified oil

Low oil level

Replenish

Inadequate engine idle speed

Adjust idle speed

Oil leakage

Broken or damaged, oil seal or O-ring

Replace control cable

Hard shift

Faulty control cable

Replace control cable

Poor contact or wear of synchronizer ring and gear cone

Correct or replace

Weakened synchronizer spring

Replace synchronizer spring

Inadequate grade of oil

Replace with specified oil

Jumps out of gear

Worn gear shift fork or broken poppet spring

Replace shift fork or poppet spring

Synchronizer hub-to-sleeve spline clearance too large

Replace synchronizer hub and sleeve