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AAM 14 Bolt, Rear Differential Cover
2019 and Newer

Project, In Development, PML Part Numbers 11173 and 11176

Availability: We will have a few covers machined with the new bolt hole pattern available January 2020. We are using the castings of PML part number 11147 to make these.

2019 and newer trucks now have a new version of the American Axle Manufacturing (AAM) 14 bolt differential.

The shape and bolt hole pattern are very similar to the pre–2019 covers.

New AAM gasket compared to pre 2019 gasket
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Gasket for this new differential is GM part number 68454491AA.

We have seen this new differential on 2019 and newer Ram 2500 and 3500 and 2020 GM 2500 and 3500 trucks.

We have heard this has a 12 inch ring gear.

For pre–2019 trucks with the AAM 11.5, 11.8 differential, see PML Part Numbers 10361 (Ram 3500), 11147 (Ram 2500) or 9511 (GM trucks).

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Let us know if you have a 2019 or newer truck with this new differential.

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We welcome information and suggestions are welcome. Email info and pictures of the stock cover to: yourcovers@pmli.com or call us 310-671-4345

Comparing Pre–2019 to New 2019 Cover

This new AAM differential cover closely resembles the existing AAM 11.5, 11.8 cover.

These pictures show a gasket from a pre-2019 AAM 14 bolt cover on a 2019 Ram 2500 truck. The top and bottom bolt holes lined up but none of the other holes.

 

Preliminary Cover

PML took the bolt hole pattern from the new differential and machined our existing cover to match.

New bolt hole pattern on PML cover New bolt hole pattern   New bolt hole pattern on PML cover New bolt hole pattern
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Installation of Prelimnary Cover

This part was successfully installed on a 2019 Ram 2500 Diesel Truck with coil suspension and a Hellwig sway bar.

Our thanks to Dave for working with us. Pictures from his installation are below:

2019 Ram 2500 stock differential cover 2019 Ram 2500 stock differential cover   Draining 2019 Ram 2500 differential Draining fluid from 2019 Ram 2500 differential   PML differential cover installed on 2019 Ram 2500 PML differential cover installed
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