Zumbrota Drive Train

News: Yukon by RANDYS Worldwide Introduces Upgrade Gears in Multiple Ratios for the Jeep Gladiator

19 Sep, 2019

Help Item: GEARS | SPIDER GEARS - What are spider gears and what do they do?

23 Feb, 2021

Spider gears are also known as satellite gears, they rotate around the side gears in the differential carrier. Side gears may also be referred to as axle gears or planetary gears. The spider...

Help Item: GEARS | SPIDER GEARS - My cross-pin shaft is scored and the spider gears wore into it. What happened?

18 Mar, 2020

When a differential is traveling in a straight line, the spider gears remain motionless in the carrier. It is not until one tire turns faster or slower than the other that the spider gears rotate...

Help Item: GEARS | SPIDER GEARS - What is this whirring noise?

18 Mar, 2020

Whirring noise only while decelerating at any or all speeds is most likely caused by bad pinion bearings or loose pinion bearing preload, and almost never by bad ring and pinion gears.

A...

Help Item: GEARS | SPIDER GEARS - What is that clunking sound I hear while turning?

18 Mar, 2020

A clunking sound that only occurs while turning is a result of broken or damaged spider gears. Spider gears do not move at all while traveling in a straight line so they’ll only squeal when...

Help Item: GEARS | RING AND PINION - What are “thick gears?”

23 Feb, 2021

The term “thick gears” refers to a ring gear that is thicker than stock to maintain proper meshing in a carrier that is being upgraded with a numerically higher gear ratio. When increasing gear...

Help Item: GEARS | RING AND PINION - Tall gear, short gear, high gear, deep gear, what does it all mean?

23 Feb, 2021

Gearheads have their own vernacular so knowing the lingo will help you communicate with your mechanic. We’re talking about gear ratio. Tall gears produce a lower numeric ratio i.e. 3.08, 3.73...

Help Item: GEARS | SET UP - What is the break-in procedure for a new set of gears?

18 Mar, 2020

All new gear sets require a break-in period to prevent damage from overheating. After driving the first 15 or 20 miles it is best to let the differential cool before proceeding. We recommend at...

Help Item: GEARS | SET UP - What is a ring and pinion gear pattern and why is it important?

23 Feb, 2021

The pattern refers to how the ring gear and pinion gears mesh. There is a process used when reassembling a differential that optimizes ring gear and pinion tooth contact. The procedure involves...

Help Item: GEARS | SET UP - Can a ring and pinion from two different sets be used together?

18 Mar, 2020

No. Gear sets are lapped at the factory and are a matched set. Attempting to run two different gears together will result in gear noise and eventual failure.

Help Item: GEARS | SET UP - I can’t get a good drive pattern on my used gear. What’s wrong?

18 Mar, 2020

When testing your pattern on a used gear, it is often difficult or impossible to get a good pattern on the drive side of the gear. The reason for this is that through use the drive sides of the...

Help Item: GEARS | CARRIER - What is deck height in a carrier housing?

23 Feb, 2021

It is the measurement from the base of the housing to the gear teeth. This mounting surface within the housing changes to accommodate the smaller pinion gears that are used when swapping to...

Zumbrota Drive Train

News: Yukon by RANDYS Worldwide Introduces Upgrade Gears in Multiple Ratios for the Jeep Gladiator

Help Item: GEARS | SPIDER GEARS - What are spider gears and what do they do?

Help Item: GEARS | SPIDER GEARS - My cross-pin shaft is scored and the spider gears wore into it. What happened?

Help Item: GEARS | SPIDER GEARS - What is this whirring noise?

Help Item: GEARS | SPIDER GEARS - What is that clunking sound I hear while turning?

Help Item: GEARS | RING AND PINION - What are “thick gears?”

Help Item: GEARS | RING AND PINION - Tall gear, short gear, high gear, deep gear, what does it all mean?

Help Item: GEARS | SET UP - What is the break-in procedure for a new set of gears?

Help Item: GEARS | SET UP - What is a ring and pinion gear pattern and why is it important?

Help Item: GEARS | SET UP - Can a ring and pinion from two different sets be used together?

Help Item: GEARS | SET UP - I can’t get a good drive pattern on my used gear. What’s wrong?

Help Item: GEARS | CARRIER - What is deck height in a carrier housing?

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