DD404-390 or DD404390 is a 404 differential carrier assembly with a ratio of 390. The differential is the set of gears that passes engine power on to the wheels while letting the wheel on each side turn at its own speed, so the carrier sits at the center of how a drive axle works. Noise is the usual early warning when something inside is wearing: a howl under acceleration points toward a worn ring and pinion, a whirring on deceleration toward pinion bearing trouble, and a rhythmic clunk can mean a broken tooth. Sold by Pro Gear and Transmission. Call us to confirm the right carrier for your axle and ratio.
A refundable core charge of $1,500.00 applies to this item and will be collected at checkout. The core charge is refunded upon receipt of your returned core, subject to its condition; customer is responsible for return shipping. Call us at (877) 776-4600 for details.
Features
404 differential carrier assembly
Ratio: 390
Part number DD404-390 or DD404390
Howl under acceleration or whirring on deceleration are the usual noise clues to ring and pinion or pinion bearing wear
Call us to confirm axle and ratio before ordering
Tech Specs
- Ratio: 390
