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Symptoms - Manual Gearbox

Checks

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Examine for a knock at low speeds.

    • Replace any worn drive axle CV joints.
    • Replace any worn side gear hub.

Examine for a noise most pronounced on turns.

Correct any abnormalities in the differential gear.

Examine for a clunk upon acceleration or deceleration.

    • Tighten any loose engine mounts.
    • Replace any worn drive axle inboard joints.
    • Replace any worn differential pinion shaft in the case.
    • Replace any worn side gear hub in the case

Examine for a clunking noise in turns.

Replace any worn outboard CV joint.

Examine for a vibration.

    • Replace any rough wheel bearing.
    • Replace any bent drive axle shaft.
    • Replace any out-of-round tyres.
    • Balance any unbalanced tyre.
    • Replace any worn CV joint in the drive axle shaft.
    • Correct an excessive drive axle angle by adjusting the trim height.

Examine for a noise in the NEUTRAL gear with the engine running.

    • Replace any worn cluster bearing shaft.
    • Replace any worn clutch-release bearing.
    • Replace any worn input shaft cluster gears.
    • Replace any worn first-gear/bearing.
    • Replace any worn second-gear/bearing.
    • Replace any worn third-gear/bearing.
    • Replace any worn fourth-gear/bearing.
    • Replace any worn fifth-gear/bearing.
    • Replace any worn mainshaft bearings.

Examine for a noise in the first gear only.

    • Replace any chipped, scored, or worn first-gear constant mesh gears.
    • Replace any worn first-second gear synchroniser.
    • Replace any worn first-gear/bearing.
    • Replace any worn differential-gear/bearing.
    • Replace any worn-ring gear.
    • Adjust, repair, or replace the gear lever and the rods.

Examine for a noise in the second gear only.

    • Replace any chipped, scored, or worn second-gear constant mesh gears.
    • Replace any worn first-second gear synchroniser.
    • Replace any worn second-gear/bearing.
    • Replace any worn differential-gear/bearing
    • Replace any worn-ring gear.
    • Adjust, repair, or replace the gear lever and the rods.

Examine for a noise in the third gear only.

    • Replace any chipped, scored, or worn third-gear constant mesh gears.
    • Replace any worn third-fourth gear synchroniser.
    • Replace any worn third-gear/bearing.
    • Replace any worn differential-gear/bearing.
    • Replace any worn-ring gear.
    • Adjust, repair, or replace the gear lever and the rods.

Examine for a noise in the fourth gear only.

    • Replace any chipped, scored, or worn fourth gear or gear output.
    • Replace any worn third-fourth gear synchroniser.
    • Replace any worn fourth-gear/bearing.
    • Replace any worn differential-gear/bearing.
    • Replace any worn-ring gear.
    • Adjust, repair, or replace the gear lever and the rods.

Examine for a noise in the fifth gear only.

    • Replace any chipped, scored, or worn fifth gear or output gear.
    • Repair any worn fifth-gear synchroniser.
    • Replace any worn fifth-gear/bearing.
    • Replace any worn differential-gear/bearing.
    • Replace any worn-ring gear.
    • Adjust, repair, or replace the gear lever and the rods.

Examine for a noise in the reverse gear only

    • Replace any chipped, scored, or worn reverse idler gear, idler-gear bushing, input gear, or output gear.
    • Replace any worn first-second gear synchroniser.
    • Replace any worn output gear.
    • Replace any worn differential-gear/bearing.
    • Replace any worn-ring gear.

Examine for a noise in all gears.

    • Add sufficient lubricant.
    • Replace any worn bearings.
    • Replace any chipped, scored, or worn input-gear shaft or output-gear shaft.

Examine for the transaxle slipping out of gear.

    • Adjust or replace the linkage, as needed.
    • Adjust, repair, or replace any binding gear lever and selector lever cable.
    • Tighten or replace the input-gear bearing retainer, as needed.
    • Repair or replace any worn or bent selector fork.

Examine for a leak in the area of the clutch.

    • Repair the transaxle casing.
    • Replace any damaged release bearing guide.

Examine for a leak at the centre of the transaxle.

    • Repair the transaxle casing.
    • Repair the selector mechanism.
    • Replace the damaged reverse lamp switch.

Examine for a leak at the differential.

    • Adjust or replace the bearing retainers.
    • Tighten or replace the differential cover.
    • Adjust or replace the drive axle shaft seals.

Examine for a hard change.

    • Replace any damaged release-bearing guide.
    • Adjust, repair, or replace the selector mechanism.
    • Adjust, repair, or replace the clutch-release system.
    • Replace any chipped, scored, or worn fifth-gear synchroniser
    • Replace any chipped, scored, or worn first-second gear synchroniser.
    • Replace any worn third-fourth gear synchroniser.
    • Adjust, repair, or replace the gear lever and the rods.

Examine for a clashing of gears.

    • Replace any damaged release-bearing guide.
    • Adjust, repair, or replace the clutch-release system.
    • Replace the chipped, scored, or worn input shaft/gear-cluster gears.
    • Replace any worn fifth-gear synchroniser.
    • Replace any worn fifth-gear/bearing.
    • Replace any worn first-gear/bearing.
    • Replace any worn first-second gear synchroniser.
    • Replace any worn second-gear/bearing.
    • Replace any worn third-gear/bearing.
    • Replace any worn third-fourth synchroniser.
    • Replace any worn fourth-gear/bearing.
    • Replace any worn reverse-idler gear.
   


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