× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: Side gear failure: Why?
Posted to Technical Discussion Forum on 11/17/2015 1 Reply


We've seen similar failures under similar driving conditions due to no fault of the driver. The spider gears aren't really designed to carry much of a load as they are designed merely to handle the speed differential in turns. When you couple a loaded truck, on a grade, making a turn, you have a triple whammy of a load on the spider pinions and they eventually fail.

In 42 years of doing exclusively transmission and drivetrain work, I don't know of anything I would recommend in this particular to prevent this from happening again except to change the route the truck is driven. That's usually not an option, so I simply replace the gears, explain the situation to the customer, and send them down the road.

Larry Bloodworth
Technical Information Specialist/Technician
Tanner Transmissions
Draper, Utah, USA

1 Replies Received (View Replies)