The Meritor A39666-1 or A396661 is a genuine OEM service gear set engineered for Meritor RDXX160 and RPXX160 drive axles. It delivers a 5.38 final drive ratio using an 8-tooth pinion (pinion reference 39893) paired with a 43-tooth ring gear. That 8x43 tooth combination is specific to this ratio family, so confirming axle model before ordering is essential. Pro Gear and Transmission carries genuine Meritor drivetrain parts. Call us to confirm proper fit for your application.
Interchanges:
- 1119442
- 1670239C91
- 81171034
- 8235A396661
- 9631A396661
- A396661RI
- ATIA396661
- E9HZ4309Y
- ERA396661
- S11665
- TDAA396661
Features
5.38 final drive ratio
8-tooth pinion (pinion ref. 39893) and 43-tooth ring gear
Fits Meritor RDXX160 and RPXX160 axle models
Genuine Meritor OEM part
Tech Specs
- Ratio: 5.38
- Axle Make: Meritor
- Axle Model: RDXX160, RPXX160
- Pinion Tooth Count: 8
- Gear Tooth Count: 43
- Pinion Reference: 39893