What is a differential pinion?

What is a differential pinion?

The differential is a vital link in a car’s drivetrain, whether it is a front wheel or rear wheel drive vehicle. The pinion gear is attached to the end of the drive shaft as it enters the differential case. As it turns, its gears cause the ring (crown wheel) gear to rotate.

How do you adjust a ring gear pattern?

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. To correct the pattern, move the pinion away from the ring gear centerline.

What is face hobbing?

The Hobbing Process The hobbing process involves a hob which is threaded with a lead and is rotated in conjunction with the gear blank at a ratio dependent upon the number of teeth to be cut. A single thread hob cutting a 40-tooth gear will make 40 revolutions for each revolution of the gear.

What is a hypoid gear set?

A hypoid gear is a style of spiral bevel gear whose main variance is that the mating gears’ axes do not intersect. The hypoid gear is offset from the gear center, allowing unique configurations and a large diameter shaft. The teeth on a hypoid gear are helical, and the pitch surface is best described as a hyperboloid.

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.

What types of gears are used to make the differential?

In rear-wheel drive automobiles the central drive shaft (or prop shaft) engages the differential through a hypoid gear (ring and pinion). The ring gear is mounted on the carrier of the planetary chain that forms the differential. This hypoid gear is a bevel gear that changes the direction of the drive rotation.

What supports the pinion gear in the differential housing?

The pinion gear is supported by two bearings, at for and aft, that are mounted in the differential housing. The bearings are set to a specific preload when the differential is assembled. The depth in which the pinion gear protrudes into the differential housing is also preset when the differential is assembled.

What is the best gear marking compound?

Using Desitin (Butt Cream) you can make a very good differential gear marking compound. The real stuff is expensive and if you lose the small packet this will work in a tight spot.

What color is your gear pattern paste?

It is a bright yellow paste. You can clearly see your gear pattern when using the GM compound. One tube is $7 and will last you 1000 diffs. Arigato, thankyou, danke, tak, xie xie, evharisto, grazzi, gracias, merci etcetera.

Is this genuine GM yellow gear paint?

It’s the genuine gm yellow gear paint as advertised. Best gear marking paint you can buy in my opinion. Of you are trying to rebuild a rear differential or a transfer case, this is the gear paint to use to check pinion depth and tooth pattern.

Can you use gear paint to check pinion depth?

Of you are trying to rebuild a rear differential or a transfer case, this is the gear paint to use to check pinion depth and tooth pattern. Don’t waste your money on cheaper products. This tube is large enough to do dozens and dozens of rebuilds. It works, but its not as good as plain old Testor’s model paint for marking external parts.