GM Turbo 400 Deep
Transmission Pan

P/N 9683

Volume: 2 qts. over stock "car" type pan

Dimensions: Click here for dimensions.

Number of Bolts: 13

The PML GM Turbo 400 deep transmission pan fits cars and trucks with the GM TH 400 transmission. This transmission is found in GMC and Chevy vehicles such as:

• 1970-76 models of Corvette, Chevy, Cadillac, Olds, Buick
• Blazer (2WD and 4WD)
• Hummer H1, 1991 and 1992
• Jeep
• Jaguar
• K1500, K2500, K3500 (2WD and 4WD)
• Rolls-Royce
• Ferrari

The transmission was first available in 1964. This pan is the same depth and capacity as the stock TH400 "truck" pan.

The pan has a boss that can be machined for a temperature sensor.

10/18/2007: We just had a customer install this pan on his 1991 Jaguar XJS.

1/17/2008: New design moves drain plug to bottom and temp sensor boss to driver's side. This update allows four wheel drive vehicles, such as Blazers, K1500, K2500, and K3500 to avoid drive shaft interference. The boss on the passenger's side is too small to be machined so a temperature sensor would need to go on the driver's side.

The TH400 transmission is called Super Turbine 400 or Turbo 400 in the racing field and is formally called THM400 for Turbo-Hydra-matic 400. It first appeared in cars in 1964 and continued in production in the 1980s. In 1980s GM changed the name to 3L80.

PML Transmission Pan Features

• Increased oil capacity for cooler temperatures
• Sand-cast aluminum with raised fins
• 3/16-inch thick wall construction to add strength to the transmission case
• 3/8-inch thick gasket flange will not bend when bolts are tightened
• Machined gasket surface for a secure seal
• Boss cast into pan can be machined for a temperature sensor
• Magnetic drain plug for easier, less messy maintenance
• Mounting hardware provided

Find out why you should buy a PML transmission pan.

Gasket and filter not included (use stock parts).

If you would like PML to machine your pan for a temperature sensor, there is an additional charge of $40. Please place your order over the phone if you would like machining.

For a larger picture, please click on one of the above images. A separate window or tab will open showing a bigger picture. (The larger pictures take a minute to display.)