The Meritor A39664-1 or A396641 is a genuine OEM service gear set engineered for RDXX160 and RPXX160 drive axles. It carries a 4.89 ratio, pairing a 44-tooth ring gear with a 9-tooth pinion (Meritor pinion number 39889). These specs make it a direct, application-specific replacement rather than a universal gear set, the ratio and tooth counts must match your existing axle configuration exactly. Call us to confirm proper fit for your axle before ordering.
Interchanges:
- 1119441
- 1670238C91
- 81170666
- 8235A396641
- A396641489S
- A396641F15
- A396641RI
- ATIA396641
- E9HZ4309X
- ER72490
- ERA396641
- SASA396641
- SC405
- TDAA396641
Features
4.89 final drive ratio
44-tooth ring gear paired with 9-tooth pinion
Pinion part number 39889
Fits RDXX160 and RPXX160 axle models
Genuine Meritor OEM part (A39664-1 or A396641)
Tech Specs
- Ratio: 4.89
- Gear Tooth Count: 44
- Pinion Tooth Count: 9
- Pinion: 39889
- Axle Model: RDXX160, RPXX160
Used in these Meritor models
