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# What does the ring gear tooth pattern represent?

## What does the ring gear tooth pattern represent?

Moving the pinion away from the ring gear causes the pattern to move up toward the top of the gear’s teeth. This pattern indicates that the pinion is too far away from the ring gear. Moving the pinion in toward the ring gear causes the pattern to move in towards the root of the gear’s teeth.

How do you read a ring and pinion 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.

What moves the pinion gear out to the ring gear?

A contact pattern closer to the gear flank means the pinion is too close to the ring gear. To correct the pattern, move the pinion away from the ring gear centerline. 1. Use shims to move the ring gear closer to the pinion gear to decrease backlash.

### How do you determine the number of teeth on a pinion?

The calculation uses the number of teeth in the ring gear and divides it by the number of teeth in the pinion gear to provide you with a “[result] to 1” ratio. For example, if the pinion gear has 41 teeth, and the ring gear has 11 teeth, the ratio would be calculated as 41/11, which is equal to 3.73 = 3.73:1.

How many teeth should a pinion gear have?

20 teeth
Summary. Empirically, a pinion with approximately 20 teeth is optimal.

How many teeth does a 373 ring gear have?

41-11 Teeth
Technical Details

Manufacturer ‎Motive Gear
Brand ‎Motive Gear
Model ‎Motive Gear D30-373 Rack and Pinion, 41-11 Teeth, 3.73 Ratio
Item Weight ‎2.2 pounds
Product Dimensions ‎15.5 x 11 x 5.25 inches

#### What is ring and pinion gear pattern?

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.

What does your gear tooth pattern mean?

Gear tooth patterns are harbingers… they can foretell whether your ring and pinion gear set is going to live a long and prosperous life or if it’s doomed to an impending catastrophic failure. Pulling off a proper differential setup comes down to precise adjustments.

What are the typical ring gear tooth contact patterns?

The following are typical ring gear patterns. Check with the manufacturer’s manual for specifications or any special procedures. This is an ideal ring gear tooth contact pattern. It’s centered between the top and the bottom of the gear’s teeth. This is also an ideal contact pattern.

## How do you adjust the pinion depth on a ring gear?

A contact pattern centered from face to flank indicates the correct pinion depth. A contact pattern closer to the gear face means the pinion is too far away from the ring gear. To correct the pattern, move the pinion toward the ring gear centerline. A contact pattern closer to the gear flank means the pinion is too close to the ring gear.