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Quick and reliable shipping ensures you get your products promptly. -
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Proudly American-owned and operated.
Great reasons to buy from us:
-
Easy Payment Options
Flexible financing options available to make your purchases more affordable. -
Fast Shipping
Quick and reliable shipping ensures you get your products promptly. -
Fitment Check
We double-check vehicle fitment before sending out products to ensure compatibility. -
American Owned
Proudly American-owned and operated.
Selectable Air Locker for the specified AMC Model 20 differential
RD187 provides air-operated differential locking with conventional open-differential operation when disengaged. Match the internal axle and ring-gear specifications rather than ordering by vehicle name alone.
Exact installation-guide specifications
| Axle | Spline | Supported ratios | Ring-gear attachment |
|---|---|---|---|
| AMC Model 20 | 29 tooth; 31.5 mm nominal shaft diameter | 2.73:1 and numerically lower | 8 bolts on a 165 mm bolt circle |
ARB’s RD187 installation guide specifies RD186—not RD187—for 3.08:1 and numerically higher ratios. Use the exact guide to confirm compatibility before purchase.
Included and required
ARB lists the differential, activation switch, solenoid, air line and bulkhead fitting. A compatible air compressor is required and sold separately. Professional differential setup is recommended by ARB; vehicle years and independent/live-axle combinations require exact application confirmation.
Manufacturer product information | Exact manufacturer installation sheet
| Shipping | This item ships to the United States |
| Delivery | Estimated between and . Will usually ship within 1 business day. |
Description
Selectable Air Locker for the specified AMC Model 20 differential
RD187 provides air-operated differential locking with conventional open-differential operation when disengaged. Match the internal axle and ring-gear specifications rather than ordering by vehicle name alone.
Exact installation-guide specifications
| Axle | Spline | Supported ratios | Ring-gear attachment |
|---|---|---|---|
| AMC Model 20 | 29 tooth; 31.5 mm nominal shaft diameter | 2.73:1 and numerically lower | 8 bolts on a 165 mm bolt circle |
ARB’s RD187 installation guide specifies RD186—not RD187—for 3.08:1 and numerically higher ratios. Use the exact guide to confirm compatibility before purchase.
Included and required
ARB lists the differential, activation switch, solenoid, air line and bulkhead fitting. A compatible air compressor is required and sold separately. Professional differential setup is recommended by ARB; vehicle years and independent/live-axle combinations require exact application confirmation.
Manufacturer product information | Exact manufacturer installation sheet
Fitement
Shipping
| Shipping | This item ships to the United States |
| Delivery | Estimated between and . Will usually ship within 1 business day. |
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