PML GM 8L90 Deep Transmission Pan

Description

Volume: 3 to 4 quarts over stock (varies depending on stock pan)

Dimensions: Click here for dimensions. , Max height is 3.9, height at rear is 2.7 inches

Number of Bolts: 15 bolts (there are 17 holes, 2 holes locate the gasket)

Pricing: not yet available

PML Design and Benefits

PML designed an extra capacity, heavy duty pan for the GM 8L90 transmission. Our design includes these benefits:

Extra capacity
Drain hole and magnetic drain plug
Choice of level check stand off pipe for accurate fluid levels on many applications
No aftermarket dipstick needed to reduce cost
Works with stock filter and gasket
Finned to aid in heat dissipation
Heavy duty sand cast aluminum construction

Since there several different stock pans and level check stand off pipe heights, PML includes choices. See SPECIFICATIONS section for more information.

Video of Installation

2020 Silverado 1500 has aftermarket dual exhausts and a lift kit so this was a complicated installation. PML pan fits great and clears exhaust.

Mailing List Signup

We welcome pictures, measurements, and suggestions. Please email us pictures of your stock pan on your truck, SUV, or care with any info to: yourcovers@pmli.com

PML will consider a stock capacity pan if there is demand.

Sign up to let PML know you rae interested in an 8L90 transmission pan. PML is working on a deep pan and a stock capacity pan would follow if enough interest. Specify vehicle and stock capacity in the Vehicle Information field.

Applications

The GM 8L90 transmission can be found on 2015 and newer Chevrolet, Cadillac, and GMC vehicles.

2015 and newer Cadillac Escalade 6.2L
2015 and newer Chevrolet Silverado 6.2L
2015 and newer GMC Sierra 6.2L
2015 and newer GMC Yukon Denali/Denali XL 6.2L

2016 to 2018 Silverado/Sierra 1500 5.3L
2016 to 2017 Yukon and Yukon XL 6.2L V8

2016 and newer Chevrolet Tahoe 6.2L

2017 and new Colorado and Canyon, gas engines (may be 8L45)
2017 to 2018 Express/Savana 2500, 3500 2.8L I4 Turbo Diesel

2018 Express/Savana 2500, 3500 4.3L V6

Some 2015 and newer models of Camaro, Corvette, and Cadillac ATS, CTS, CT4, and CT6 (may lack ground clearance for a deeper transmission pan)

Always check your vehicle to verify transmission and clearance. Configurations vary. If there is not enough ground clearance for this deep pan, email us at: yourcovers@pmli.com

Installations

2020 Silverado 1500

Torrance Transmission installed this PML 8L90 pan on Damien's 2020 Silverado 1500 5.3 Z71 4WD truck. Truck has a lift kit, 38 inch tires, aftermarket dual exhaust and a PML GM 9.5 12 bolt rear differential cover.

This truck had OEM pan part number 24278775 and the fluid check hole was level with the flange. After loosening the aftermarket exhaust pipes and jacking up the transfer case, the OEM pan could finally be removed and the PML pan installed. The fill plug is behind a shield, which made it difficult to access.

Even with the modifications and aftermarket parts, the PML pan fit great. Video of this installation available on YouTube: https://youtu.be/LmYAk02_pLE

2020 Silverado 1500 with PML rear differential cover stock pan tool for accessing bolts behind aftermarket exhaust

exhaust loosening exhaust pipes to make space jacking up transfer case

OEM pan dropped and draining PML provides new, longer mounting bolts PML 8L90 pan installed

Fluid fill is on passenger side of transmission case PML 8L90 pan fits great, no clearance issues PML 8L90 pan on 2020 Silverado 1500

Click on image to view larger in a new tab or window.

2017 Canyon 3.6 Gas Engine 8L45

Bruce installed this PML transmission pan on the 8L45 in his 2017 GMC Canyon Denali 4WD 3.6 gas engine truck. Bruce borrowed a friend's lift to make the installation easier. They needed to loosen the exhaust at the manifold to lower the cross over pipe. Installation was straight forward. He selected the longest PML level check pipe. He added about 4 extra quarts. He used an 8L90 fill tube he got on Summit Racing. The passenger side of the pan has a 1/8 NPT for a future temperture sending unit. He also wrapped his exhaust while the truck was on the lift.

The truck has a factory skid plate, which is not shown in the pictures. He removed the skid plate to install the PML pan and reinstalled a few days later. Bruce reported that the skid plate fits find with the PML pan.

2017 Canyon gas engine truck with 8L45 transmission stock pan on truck lowered exhaust to removed stock pan GM part number on original transmission pan level check stand off pipe inside stock pan PML pan level check stand off pipe PML pan installed Magnetic drain plug on the side of the PML pan
Click on image to view larger in a new tab or window.

Specifications

Level Check

For most 8L45, 8L90 transmissions, the fluid level check is on the transmission pan. PML knows of 6 different OEM pans with various level check stand off pipes in the pan. The height of the pipe above the flange controls the amount of fluid.

8L90 trans pans stand off pipes
Inside of OEM transmission pans. Distance above the flange for these pans: none, 1 inch, 1 inch, and 1/4 inch
Measurements are approximate. Click on image to view larger.

When installing this PML pan, use the correct level check stand off pipe if one is needed. On the OEM pan, measure the distance from the flange to the top of the level check stand off pipe. If there's no pipe that goes above the flange, the PML pan is good to go out of the box. PML provides level check stand off pipes with each pan.

Maintaining a correct fluid level is important to the operation of the transmission so verify the fluid level check procedure of any aftermarket pan to avoid over or under filling transmission.

Inside of PML 8L90 Transmission Pan

Inside of PML 8L90 pan, Click To View Larger Image
Click on image to view larger.

Drain, Level Check, and Optional Temperature Sending Unit Machining

Drain and level check holes are located on the driver/left side of the PML transmission pan. Plugs are provided. For the drain hole, the plug is magnetic.

Drain hole, level check hole, and optional machining locations plugs installed Click on image to view larger.

The length of the level check stand off pipe varies with the application. PML supplies these with the pan.

Optionally, this pan can be drilled and tapped for an aftermarket temperature sending unit. The location is on the passenger side. If you want PML to machine this hole, there is a machining charge and the standard size is for a 1/8 NPT.

Example 8L90 Transmission and OEM Stock Pans

There are at least 6 different OEM stock transmission pans. The bolt hole pattern is the same for all of them. The shape of the pans vary and the standoff pipes for the level check are different. There are also internal differences with the transmission.

GM 8L45, 8L90 transmission with filter GM 8L90 Transmission Pans, Click To View Larger Image 2019 Colorado 8L90 Transmission Pan, Click To View Larger Image 2020 Silverado 8L90 Transmission Pan, Click To View Larger Image
Pictures of the stock pans are from a 2019 Colorado (GM part number 24274616) and a 2020 Silverado (GM part number 24278875).
Click on image to view larger images in a new tab or window.

PML Transmission Pan Compared to Stock

Always check your vehicle for clearance for a larger transmisssion pan before ordering. If the frame or an exhause pipe run under the stock pan, measure from the transmission housing flange down to see if PML pan will fit.

This PML pan is deeper than stock pans by about 1.5 inches at the deepest points and at the rear the PML pan is deeper by 3/8 to 1 inch, depending on OEM pan in the vehicle.

There are many different stock pans. The ones we have seen all have a maximum depth of about 2.4 inches.

At the rear where the PML pan does not have fins, it is 2.7 inches deep. This allows for clearance for exhaust cross over pipes or the frame which run under the rear of the pan on some vehicles.

Click on image to view larger.

Measurements are approximate.

GM 8L90 Deep Part Number 11140