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Axle-specific differential protection
The aFe 46-71060B Pro Series black cover fits the specified AAM 11.5-inch rear differential.
Key Features
- Cast aluminum with reinforcing ribs, internal/external cooling fins and black powder-coating with machined fins.
- Magnetic drain plug and 3/4-inch NPT magnetic top fill plug with a 6-inch deep reach and pre-installed porthole view gauge.
- Factory-level calibration port; pre-installed sight glass on the black cover.
- Manufacturer states this product does not require a CARB EO number. This statement applies to the cover itself.
Fitment
| Years | Make | Model | Trim / required axle |
|---|---|---|---|
| 2001-2004 | Chevrolet | Silverado 2500 | Base; AAM 11.5-inch |
| 2001-2004 | Chevrolet | Silverado 2500 | LS; AAM 11.5-inch |
| 2001-2004 | Chevrolet | Silverado 2500 | LT; AAM 11.5-inch |
| 2004 | Chevrolet | Silverado 2500 | WT; AAM 11.5-inch |
| 2001-2005 | Chevrolet | Silverado 2500 HD | Base; AAM 11.5-inch |
| 2015-2019 | Chevrolet | Silverado 2500 HD | High Country; AAM 11.5-inch |
| 2001-2005 | Chevrolet | Silverado 3500 | Base; AAM 11.5-inch |
| 2001-2006 | Chevrolet | Silverado 3500 | LS; AAM 11.5-inch |
| 2001-2006 | Chevrolet | Silverado 3500 | LT; AAM 11.5-inch |
| 2004 | Chevrolet | Silverado 3500 | WT; AAM 11.5-inch |
| 2006 | Chevrolet | Silverado 3500 | WT; AAM 11.5-inch |
| 2015-2019 | Chevrolet | Silverado 3500 HD | High Country; AAM 11.5-inch |
| 2001-2019 | Chevrolet | Silverado 2500 HD | LT; AAM 11.5-inch |
| 2007-2019 | Chevrolet | Silverado 2500 HD | LTZ; AAM 11.5-inch |
| 2003-2019 | Chevrolet | Silverado 2500 HD | WT; AAM 11.5-inch |
| 2007 | Chevrolet | Silverado 2500 HD Classic | LS; AAM 11.5-inch |
| 2007 | Chevrolet | Silverado 2500 HD Classic | LT; AAM 11.5-inch |
| 2007-2019 | Chevrolet | Silverado 3500 HD | LTZ; AAM 11.5-inch |
| 2007-2019 | Chevrolet | Silverado 3500 HD | WT; AAM 11.5-inch |
| 2001-2006 | Chevrolet | Silverado 2500 HD | LS; AAM 11.5-inch |
| 2007 | Chevrolet | Silverado 2500 HD Classic | WT; AAM 11.5-inch |
| 2007-2019 | Chevrolet | Silverado 3500 HD | LT; AAM 11.5-inch |
| 2002-2005 | GMC | Sierra 2500 HD | Base; AAM 11.5-inch |
| 2015-2019 | GMC | Sierra 2500 HD | Base; AAM 11.5-inch |
| 2011-2019 | GMC | Sierra 2500 HD | Denali; AAM 11.5-inch |
| 2001-2002 | GMC | Sierra 2500 HD | SL; AAM 11.5-inch |
| 2006 | GMC | Sierra 2500 HD | SL; AAM 11.5-inch |
| 2001-2019 | GMC | Sierra 2500 HD | SLE; AAM 11.5-inch |
| 2001-2019 | GMC | Sierra 2500 HD | SLT; AAM 11.5-inch |
| 2003-2014 | GMC | Sierra 2500 HD | WT; AAM 11.5-inch |
| 2007 | GMC | Sierra 2500 HD Classic | SL; AAM 11.5-inch |
| 2007 | GMC | Sierra 2500 HD Classic | SLE; AAM 11.5-inch |
| 2007 | GMC | Sierra 2500 HD Classic | SLT; AAM 11.5-inch |
| 2007 | GMC | Sierra 2500 HD Classic | WT; AAM 11.5-inch |
| 2002-2005 | GMC | Sierra 3500 | Base; AAM 11.5-inch |
| 2001-2002 | GMC | Sierra 3500 | SL; AAM 11.5-inch |
| 2006 | GMC | Sierra 3500 | SL; AAM 11.5-inch |
| 2001-2006 | GMC | Sierra 3500 | SLE; AAM 11.5-inch |
| 2001-2006 | GMC | Sierra 3500 | SLT; AAM 11.5-inch |
| 2004-2006 | GMC | Sierra 3500 | WT; AAM 11.5-inch |
| 2007 | GMC | Sierra 3500 Classic | SL; AAM 11.5-inch |
| 2007 | GMC | Sierra 3500 Classic | SLE; AAM 11.5-inch |
| 2007 | GMC | Sierra 3500 Classic | SLT; AAM 11.5-inch |
| 2007 | GMC | Sierra 3500 Classic | WT; AAM 11.5-inch |
| 2015-2019 | GMC | Sierra 3500 HD | Base; AAM 11.5-inch |
| 2011-2019 | GMC | Sierra 3500 HD | Denali; AAM 11.5-inch |
| 2007-2019 | GMC | Sierra 3500 HD | SLE; AAM 11.5-inch |
| 2007-2019 | GMC | Sierra 3500 HD | SLT; AAM 11.5-inch |
| 2007-2014 | GMC | Sierra 3500 HD | WT; AAM 11.5-inch |
46-71060B: The exact current manufacturer covers the listed 2001-2019 GM trucks with an AAM 11.5-inch, 14-bolt REAR axle, naming 6.6L diesel and 8.1L/6.0L gas applications. The complete shared manual explicitly lists GM 2500/3500 2001-2019 6.6L, 3500 2001-2007 8.1L and 3500 2007-2019 6.0L. Its narrower gas headings are distinguished from broader current family copy. Confirm the actual axle and housing, including gas-truck axle options; an engine or trim name alone does not establish fitment. Exact-part named tables restore missing Chevrolet/GMC rows while preserving original year gaps. No 1500, different axle, 11.8-inch housing, 2020+ truck or older superseded-cover application is newly approved.
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | 46-71060B |
| Position / axle | Rear / AAM 11.5-inch / 12-bolt pattern |
| Finish | Black powder-coating with machined fins |
| Fill plug | 3/4-inch NPT magnetic top fill plug with a 6-inch deep reach and pre-installed porthole view gauge |
| Fluid level | Fill with the correct new gear oil until oil runs from the side 1/8-inch calibration port, about 4 quarts in the illustrated manual installation. Use the calibrated level rather than a universal quart count and verify the correct level on a lifted truck with a rotated axle. |
| Tightening | Tighten mounting screws to 12-16 ft-lb in a crisscross pattern according to the exact manual. It does not provide a numerical drain-plug torque, NPT turn count or a separate track-bar torque. Keep these values specific to this cover rather than borrowing the Ford 8.8 drain torque. |
What's Included
- One black powder-coated Pro Series cast-aluminum rear cover with machined fins, black instant-gasket RTV silicone, fourteen M8 x 1.25 x 30 socket-head screws, two M8 x 1.25 x 40 socket-head screws, eighteen flat washers, two spacers, one M12 x 1.25 magnetic drain plug with crush washer, one 1/8-inch NPT calibration plug, and 3/4-inch NPT magnetic top fill plug with a 6-inch deep reach and pre-installed porthole view gauge. The longer screws and spacers serve the applicable brake-line bracket arrangement; the axle cover pattern remains fourteen bolts.
- RTV silicone is supplied; the manual also permits reuse of an applicable OEM gasket instead of silicone. A new gasket, gear-oil fill, axle additive, tools, filter and coupler are not established in the bill of materials. Use the supplied sealant instructions and the actual axle lubricant specification. This manual supplies no fixed cure-time interval to borrow from another kit.
Related Parts
Explore aFe Power drivetrain parts. Select the exact front and rear covers separately by axle identification.
Frequently Asked Questions
What is the 46-71060B?Black Pro Series cast-aluminum cover for the AAM 11.5-inch rear axle.
Which axle and model years apply?The exact current manufacturer covers the listed 2001-2019 GM trucks with an AAM 11.5-inch, 14-bolt REAR axle, naming 6.6L diesel and 8.1L/6.0L gas applications. The complete shared manual explicitly lists GM 2500/3500 2001-2019 6.6L, 3500 2001-2007 8.1L and 3500 2007-2019 6.0L. Its narrower gas headings are distinguished from broader current family copy. Confirm the actual axle and housing, including gas-truck axle options; an engine or trim name alone does not establish fitment. Exact-part named tables restore missing Chevrolet/GMC rows while preserving original year gaps. No 1500, different axle, 11.8-inch housing, 2020+ truck or older superseded-cover application is newly approved.
Which fill plug and sight glass are included?3/4-inch npt magnetic top fill plug with a 6-inch deep reach and pre-installed porthole view gauge. The extra long screws, spacers and washers are for the applicable brake-line bracket; they do not change this fourteen-bolt cover into a sixteen-bolt axle application. The black kit’s sight glass is described as pre-installed in its own bill of materials.
Which mounting hardware is supplied?Fourteen M8 x 1.25 x 30 screws, two M8 x 1.25 x 40 screws, eighteen washers and two spacers. The two longer screws, two spacers and four washers are used for the top-left brake-line bracket where fitted.
Is a new gasket or gear oil included?RTV silicone is supplied; the manual also permits reuse of an applicable OEM gasket instead of silicone. A new gasket, gear-oil fill, axle additive, tools, filter and coupler are not established in the bill of materials. Use the supplied sealant instructions and the actual axle lubricant specification. This manual supplies no fixed cure-time interval to borrow from another kit.
How is the correct oil level set?Fill with the correct new gear oil until oil runs from the side 1/8-inch calibration port, about 4 quarts in the illustrated manual installation. Use the calibrated level rather than a universal quart count and verify the correct level on a lifted truck with a rotated axle.
What tightening values apply?Tighten mounting screws to 12-16 ft-lb in a crisscross pattern according to the exact manual. It does not provide a numerical drain-plug torque, NPT turn count or a separate track-bar torque. Keep these values specific to this cover rather than borrowing the Ford 8.8 drain torque.
What installation checks are important?Block the tires on a flat dry surface. Note all bracket positions, remove the lower thirteen bolts, loosen the single remaining top bolt to drain and then remove the cover. Clean and inspect the housing without gouging or rounding its gasket face. Test fit the cover, apply the supplied RTV as directed, or reuse an applicable OEM gasket instead. Install the initial four short screws and washers to locate the cover without disturbing the sealant. Where fitted, restore the top-left brake-line bracket with the two longer M8 x 1.25 x 40 screws, two spacers and four washers. Restore other brackets with the shorter screws and washers, install the remaining cover screws and tighten in a crisscross pattern. Fit the drain plug/crush washer and correct raw or black plugs, fill by the calibration port, apply pipe sealant where directed and inspect clearances and leaks.
Installation Instructions
Read the current manufacturer listing for 46-71060B and full exact-family installation manual.
Block the tires on a flat dry surface. Note all bracket positions, remove the lower thirteen bolts, loosen the single remaining top bolt to drain and then remove the cover. Clean and inspect the housing without gouging or rounding its gasket face. Test fit the cover, apply the supplied RTV as directed, or reuse an applicable OEM gasket instead. Install the initial four short screws and washers to locate the cover without disturbing the sealant. Where fitted, restore the top-left brake-line bracket with the two longer M8 x 1.25 x 40 screws, two spacers and four washers. Restore other brackets with the shorter screws and washers, install the remaining cover screws and tighten in a crisscross pattern. Fit the drain plug/crush washer and correct raw or black plugs, fill by the calibration port, apply pipe sealant where directed and inspect clearances and leaks.
Tighten mounting screws to 12-16 ft-lb in a crisscross pattern according to the exact manual. It does not provide a numerical drain-plug torque, NPT turn count or a separate track-bar torque. Keep these values specific to this cover rather than borrowing the Ford 8.8 drain torque.
Fill with the correct new gear oil until oil runs from the side 1/8-inch calibration port, about 4 quarts in the illustrated manual installation. Use the calibrated level rather than a universal quart count and verify the correct level on a lifted truck with a rotated axle.
46-71060B: The extra long screws, spacers and washers are for the applicable brake-line bracket; they do not change this fourteen-bolt cover into a sixteen-bolt axle application. The black kit’s sight glass is described as pre-installed in its own bill of materials.
California Proposition 65 Warning
- California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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