How much backlash should a diff have?
Keep the backlash variation under 0.005″ if possible. In a perfect world no variation would be the goal. However, even with a straight case the backlash can vary 0.005″ without any negative consequences, so this is an area where each assembler will have to decide how much they are willing to allow.
How do you measure ring and pinion gear backlash?
To measure ring and pinion backlash, position a dial indicator stem on one of the ring gear teeth. Then, while holding the pinion gear STATIONARY, wiggle the ring gear back and forth. Indicator needle movement will equal gear backlash. Compare your measurements to the manufacturer’s specifications and adjust as needed.
What is backlash in measurement?
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. Figure 39.17.
How do you read a backlash gauge?
Turn the adjustment knob on the side of the dial indicator gauge until the gauge needle points to the “0” setting. Rock the ring gear back and forth with your hand while monitoring the gauge needle. The distance indicated on the gauge is the gear backlash.
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 is the 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.
What happens with too much backlash?
If there is too much backlash, the ring gear needs to move closer to the pinion gear. If there is not enough, the ring gear needs to move away from the pinion gear. If it is too loose, this will allow the gears to beat on each other, and you will eventually fracture or break teeth off the gears.
What happens if you have too much backlash?
Possible Cause #3: Incorrect backlash can lead to damaged gear teeth. The backlash setting, which affects how much fluid gets between the teeth of the gear set, should be set between . 006 and . If driven too hard, the gears will wear early and cause excessive noise.
How is crown and pinion backlash measured?
With the carrier assembly installed, attach your dial indicator with the plunger at a 90-degree angle from the face of the ring gear teeth. Gently rock the carrier back and forth to measure your backlash. You’ll want to do this in three separate locations on the ring gear to check for runout.
What is backlash in a gear?
What does it mean to measure gear backlash?
The amount of play between the ring and pinion gears is referred to as gear backlash. Measuring the backlash is a fairly straightforward task and is a quick way of determining whether a professional adjustment or more extensive service may be necessary.
What should clearance be between gear tooth and oil pump?
Check the clearance between each gear tooth and the pump body. At the closest point it should typically be no more than .006in. (.15 mm). Make sure that the face of the pump is clean, and put a straightedge across it.
How do you measure backlash on a differential?
Measuring the backlash is a fairly straightforward task and is a quick way of determining whether a professional adjustment or more extensive service may be necessary. Position the differential securely within the jaws of a large vise with the gears facing up. Attach a dial indicator gauge to the outer edge of the differential.
How can I check the oil pump clearance?
Measure the gap between the straight-edge and the surface of the vanes and rotor, using a 13mm feeler gauge. Check the clearance between the tips of the inner and outer rotor lobes. Check the clearance between each gear tooth and the pump body.