What is back lash with respect to rear axle?

Backlash is the amount of space between the teeth of the pinion gear and the ring gear. Measured as the amount of rotation of the differential, forward and backward, with the pinion locked in place.

1. What is rear end lash?
2. What is backlash in differential gears?
3. What happens if pinion preload is too high?
4. How do I know if my pinion bearing is bad?
5. What is gear lash?
6. What causes diff whine?
7. Why is backlash needed in a rear axle?
8. How much backlash should a ring and pinion have?
9. What happens if your backlash is to tight?
10. What does a loose pinion nut sound like?
11. What causes ring and pinion whine?

What is rear end lash?

Back lash is how much play there is between your gears, the play becomes important when the loading and unloading goes on(acceleration). It is adjustable, the problem is you can only adjust it with shims while doing a rebuild.

What is backlash in differential gears?

Backlash is the play—or how much play there is between your ring and pinion gears. ... Once the pinion depth is properly set, the backlash needs to be adjusted and set. Some rear ends use adjusters that are located next to the differential carrier bearings, and others are adjusted by adding/removing shims.

What happens if pinion preload is too high?

worst case if you let it gonlong enough, the slack and metal will destroy ring and pinion and carrier bearings, or can even lock up rear end, destroying driveshaft, transmission etc.

How do I know if my pinion bearing is bad?

A whine during deceleration may mean there is a bad or loose pinion bearing. A howl during acceleration may indicate the same problem. Rumble or whining sounds only at speeds greater than 20 mph could be a sign of a worn carrier bearing. The sound may change while cornering.

What is gear lash?

Gear backlash is the play between teeth measured at the pitch circle. It is the distance between the involutes of the mating gear teeth, as illustrated in Figure 39.17.

What causes diff whine?

A “howl or whine” during acceleration over a small or large speedrange is usually caused by worn ring and pinion gears or improper gear set up.

Why is backlash needed in a rear axle?

The gap is necessary so that the driver or electronics can engage the gears easily while synchronizing the engine speed with the driveshaft speed. If there was a smaller clearance, it would be nearly impossible to engage the gears because the teeth would interfere with each other in most configurations.

How much backlash should a ring and pinion have?

012” backlash for street gear sets and . 006” to . 008” backlash for competition gear sets.

What happens if your backlash is to tight?

If the backlash is too tight, move the carrier away from the pinion by adjusting the carrier shim. If the backlash is too wide, adjust the carrier toward the pinion. When adjusting the backlash, a rule of thumb is 10 thousandths of carrier shim adjustment will result in around 7 thou of backlash adjustment.

What does a loose pinion nut sound like?

Whirring Noise: One of the pronounced bad pinion-bearing symptoms is its whirring noise during acceleration or deceleration at various speeds. Worn out pinion bearings create more whirring noise rather than rumbling because it rotates several times faster than the carrier assembly of the vehicle.

What causes ring and pinion whine?

A howl or whine during acceleration over a small or large speed range is usually caused by worn ring and pinion gears or improper gear set up. Rumbling or whirring at speeds over about 20 mph can be caused by worn carrier bearings. The noise may change while turning.