Manual Transmission

Symptoms	Possible cause	Corrective action
1. Gears are difficult to intermesh. NOTE: The cause for difficulty in shifting gears can be classified into two types: One is a defective gear shift system and the other is defective transmission. However, if the operation is heavy and engagement of the gears is difficult, a defective clutch disengagement may also be responsible. Check whether the clutch is correctly functioning, before checking the gear shift system and transmission.	(a) Worn, damaged or burred chamfer at internal spline of the sleeve	Replace.
	(b) Gear spline wear, damage, dents	Replace.
	(c) Worn or scratched bushings	Replace.
	(d) Incorrect contact or wear between synchronizer ring and gear cone	Repair or replace.
2. Gear slip-out Gear slips out when coasting on rough road. Gear slips out during acceleration.	(a) Loose engine mounting bolts	Tighten or replace.
	(b) Worn fork shifter or broken shifter fork rail spring	Replace.
	(c) Worn or damaged ball bearing	Replace.
	(d) Excessive clearance between splines of synchronizer hub and synchronizer sleeve	Replace.
	(e) Synchronizer hub tooth step wear	Replace.
	(f) Worn 1st driven gear and driven shaft	Replace.
	(g) Worn 2nd driven gear and bushing	Replace.
	(h) Worn 3rd drive gear and needle bearing	Replace.
	(i) Worn 4th drive gear and needle bearing	Replace.
	(j) Worn 5th drive gear and needle bearing	Replace.
	(k) Worn 6th drive gear and needle bearing	Replace.
	(l) Worn reverse idler gear and needle bearing	Replace.
3. Noise emitted from transmission NOTE: If a noise is heard when the vehicle is parked with its engine idling and if a noise ceases when the clutch is disengaged, it may be considered that the noise is coming from the transmission.	(a) Insufficient or improper lubrication	Lubricate with recommended oil or replace.
	(b) Worn or damaged gears and bearings NOTE: If the trouble is only wear of the gear teeth surfaces, only a high whirring noise will occur at high speeds, but if any part is broken, rhythmical clicking sounds will be heard even at low speeds.	Replace.