How do you read a ring gear pattern?

(1) Decreasing backlash moves the ring gear closer to the pinion.

  1. Drive pattern (convex side of gear) moves slightly lower and toward the toe.
  2. Coast pattern (concave side of gear) moves lower and toward the toe.
  3. Drive pattern moves slightly higher and toward the heel.
  4. Coast pattern moves higher and towards the heel.

How do you perform a ring gear tooth contact pattern?

Load the ring gear and run a full contact pattern check. Observe all gear teeth for proper contact pattern and a uniform pattern from tooth to tooth. The contact pattern on the drive side (convex) of the tooth is mostly towards the toe. Correction: Move the pinion gear closer to the ring gear.

What is backlash in gear?

Backlash, sometimes called lash or play, is clearance between mating components, sometimes described as the amount of lost motion due to clearance or slackness when movement is reversed and contact is reestablished. For example, in a pair of gears, backlash is the amount of clearance between mated gear teeth.

How do you know if your ring and pinion is bad?

Here are some of the most common symptoms:

  1. Service Past Due.
  2. Leaking Differential Oil.
  3. Strange Noises…
  4. A “whirring” noise while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload.
  5. Vibrations.
  6. Unusual Smells.

Can you replace just the pinion gear?

Yes. Ring and Pinion gears come in matched sets and must be replaced at the same time.

What does a bad pinion gear look like?

Regular clunking every few feet may indicate broken ring or pinion gears. Banging or clunking only on corners can be caused by broken spider gears, lack of sufficient positraction lubrication, or worn positraction clutches. Rumble while turning may indicate bad wheel bearings.

How much does it cost to replace a pinion gear?

Pinion Seal Replacement Cost – RepairPal Estimate. Labor costs are estimated between $170 and $214 while parts are priced between $60 and $62. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed.

Why is backlash bad?

It is the distance between the involutes of the mating gear teeth, as illustrated in Figure 39.17. Backlash is necessary to provide the running clearance needed to prevent binding of the mating gears, which can result in heat generation, noise, abnormal wear, overload, and/or failure of the drive.

What is the minimum and maximum backlash?

As a rule of thumb the average backlash is defined as 0.04 divided by the diametral pitch; the minimum being 0.03 divided by the diametral pitch and the maximum 0.05 divided by the diametral pitch.

What’s the proper ring and pinion gear pattern?

Interpretation & Adjustment Guide. Ring and Pinion Gear Pattern is one of the most valuable tools for determining if a differential is properly set up. The images below illustrate both acceptable and unacceptable ring and pinion gear patterns.

Are there two types of ring gear teeth?

not present toe contact heel contact heel contact toe contact toe contact heel contact

Which is the best contact pattern for gearing?

IDEAL CONTACT Pattern is spread evenly over tooth’s profile with concentration nearer toe than heel. COMPETITION CONTACT Pattern concentrated just up from the toe covering 1/3 to 1/2 of the tooth. HIGH CONTACT Pattern is concentrated at the crown of the drive gear tooth.

Which is the heel of a ring gear?

The heel is the outside of the ring gear. The inside is known as its toe. The bottom or base of the gear’s tooth is called its root or flank. The top land or crown of the gears tooth is its flat surface at the top. Notice the coast side doesn’t have as sharp of an angle as the drive side of the gear’s tooth.