GM 4L80E Deep Cast Transmission Pan with Slant Rear

Description

Overview

The GM 4L80E Deep Cast Transmission Pan with Slant Rear is a premium upgrade designed to improve durability, cooling, and oil capacity for GM’s heavy-duty 4L80E and 4L85E transmissions. Built from high-strength cast aluminium, this pan provides an additional 3L of transmission fluid over the stock pan, helping reduce heat and extend component life. Whether towing, off-roading, or running high-performance applications, this pan ensures long-term reliability and performance.

Key Features of the GM 4L80E Deep Cast Transmission Pan

• Extra 3L oil capacity for improved lubrication and cooling
• Cast aluminium construction resists warping and improves heat dissipation
• Slant rear design for clearance on lowered or modified vehicles
• Reinforced ribbing adds strength and rigidity under load
• Drain plug included for easy servicing and fluid changes
• Direct bolt-on replacement for OEM pans

Specifications

• Material: Heavy-duty cast aluminium
• Volume: 3L above stock capacity
• Finish: Natural cast aluminium
• Part Number: PAN-9437-AC
• Fitment: GM 4L80E & 4L85E transmissions

What’s in the Box

• 1 x GM 4L80E/4L85E Deep Cast Transmission Pan with Slant Rear
• Drain plug (pre-installed)
• Mounting hardware kit
• Installation instructions

Compatibility

• GM 4L80E transmissions
• GM 4L85E transmissions

Fitting Instructions

Download official fitting instructions (PDF)

Why Upgrade to a Deep Cast Transmission Pan?

Standard pressed steel pans are prone to flexing and limited in cooling capacity. By switching to a deep cast aluminium design, you gain additional fluid capacity, improved thermal stability, and greater structural integrity. This upgrade is particularly beneficial for vehicles frequently towing heavy loads, operating in hot climates, or running modified engines that generate more heat. The slant rear design also makes installation easier on vehicles with clearance limitations.

Delivery & Lead Times

This product is normally in stock and ready for dispatch. Typical delivery times within Australia are 3–7 business days. International orders may take longer depending on courier and destination.

Professional Fitting Service on the Sunshine Coast

Sunshine Coast Diesel Tuning offers expert installation of all transmission upgrades, including the GM 4L80E Deep Cast Transmission Pan. Our technicians ensure correct fitment, torque specifications, and leak-free operation, giving you complete confidence in your vehicle’s performance. Contact us today to book a fitting service at our Sunshine Coast workshop.