Product Overview

This Allison transmission pan includes magnetic drain plug and mounting hardware.
Price varies with finish.

Volume: 3.25 qts. over stock

Dimensions: Click here for dimensions.

Number of Bolts: 12

PML designed this transmission pan for 2001 to 2019 Chevrolet & GMC full size trucks with the Allison 1000 5 & 6 speed automatic transmission.

Video of an installation of this pan on a 2005 Silverado 2500HD Duramax:

Applications:

The Allison 5 and 6 speed transmission is found in the Silverado & Sierra 2500 & 3500 with the Duramax diesel or 8.1 liter gas engine. Typical applications are:

2001 to 2019 Sierra 2500HD, 8.1 V8 or Duramax Diesel
2001 to 2019 Silverado 2500HD, 8.1 V8 or Duramax Diesel
2001 to 2019 Sierra 3500 or 3500HD, 8.1 V8 or Duramax Diesel
2001 to 2019 Silverado 3500 or 3500HD, 8.1 V8 or Duramax Diesel
2007 Sierra 2500HD Classic, 8.1 V8 or Duramax Diesel
2007 Silverado 2500HD Classic, 8.1 V8 or Duramax Diesel
2007 Sierra 3500 Classic, 8.1 V8 or Duramax Diesel
2007 Silverado 3500 Classic, 8.1 V8 or Duramax Diesel

Please check carefully for fit and interference. Vehicle configurations vary.

2006 and 2007 H1 Hummer may have an Allison transmission but lack space for a larger transmission pan.

10 Speed, 2019 and newer: This pan will not fit the 10 speed Allison transmission. Contact us if you have a 10 speed Allison transmission.

Gasket

The only gasket we know about for the Allison is the reusable gasket. A flexible, thin cork or cork composite gasket works best with PML pans. With the hard reusable gasket, make sure that it is clean and free of nicks or there will be a leak. You may need to file down the gasket bolt holes so the bolts do not bind and the pan seals correctly.

Some installations have used a very thin bead of silicon (RTV) instead of the gasket.

Installer must verify transmission, filter, gasket and fitment based on the individual vehicle. This information provided for reference only.

PML Pan Drain and Optional Temperature Sending Unit Machining

Click on image to view larger.

The drain for this pan is on the front side of the pan for easy access. A magnetic drain plug and all mounting bolts are included with the pan.

Optionally, PML can drill and tap a 1/8 NPT hole for a temperature sending unit. This would be for an aftermarket temperature gage. There is a custom machining charge.

The hole would be machined on the front edge of the pan, in the middle, about 4 inches from the drain. In that location, the pan has a boss on the inside of the casting

Select the option before adding pan to cart. A plug for the hole is included. The standard size is 1/8 NPT. Check your aftermarket gage to verify the thread specifications for the sending unit before ordering. Call or email if you need a different size.

Filters and Filter Supports

The transmission pan features filter supports that are an integral part of the floor.

Out of the box the filter supports are set up to work with filter part number 29542833. This filter works with the PML transmission pan on all years of the Allison transmission (2001 to 2015). We have also heard that filter part number 29537965 works best on some years, such as the 2005 Allison transmissions.

Click on an image to view larger. The pan has been cut away so you can see the filter supports and filter.
From left to right:
   Inside of PML pan, showing filter supports
   Filter part number 29542833
   Filter 29542833 with the PML pan on a 2005 Allison transmission
   Filter 29542833 with the PML pan on a 2011 Allison transmission

Our thanks to Revmax Torque Converters for the pictures and assistance.

Other filters are available. Make sure the filter sits correctly on the filter supports such that the filter will not fall out of the transmission nor will it get shoved up into valve body causing damage.

The PML pan is a deep pan but it is NOT designed to work with what is called "the Allison deep filter".

Information about filters for reference only. Installer should verify transmission, filter, and fitment based on the individual vehicle.