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GM Turbo 350 Deep
Transmission Pan

P/N 9684

PML TH 350 Deep tranny pan, as-cast
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PML TH 350 Deep tranny pan, powder coated
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PML TH 350 Deep tranny pan, polished
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As-cast finish
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Black powder coating
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Polished finish
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Volume: 2 quarts over stock

Dimensions: Click here for dimensions.

Number of Bolts: 13

This PML pan fits cars and trucks with the GM TH350 (Turbo-Hydramatic 350) transmission. The transmission was first available in 1969 after joint development by Buick and Chevrolet. The TH350 transmission is found in GM (Chevy, Cadillac, Olds, Buick) vehicles as well as retrofitted Jeeps and other cars and trucks. For example, this transmission was originally on 1967 to 1972 El Caminos, Blazers, and C/K 20 trucks and Suburbans.

The pan has bosses that can be machined for aftermarket sensors and gages.

The TH350 transmission is called Turbo 350 in the racing field and is formally called THM350 for Turbo-Hydra-matic 350. It first appeared in cars in 1969 and continued in production in the 1980s.

PML also offers a low profile version of this pan for vehicles that need more ground clearance. The low profile pan, PML part number 9589 has the external bosses that may interfere with the drive shaft on some vehicles.

PML moved the drain plug and bosses for an optional temperature sending unit in 2014. These were on the outside of pan and are now on the inside. They interfered with the drive shaft on some vehicles. The polish finish pan shown above still has the bosses on the outside of the pan. Optionally, PML can drill and tap a boss to your specifications between 1/8 NPT and 1/2 NPT for a $45 machining charge.

The filter bolts on to the valve body so no filter supports or extensions are needed.

PML Transmission Pan Compared to Stock

PML Transmission Pan Part Numbers 9589_9684 height compared to stock  PML Transmission Pan Part Numbers 9684, compared to stock
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These images show this PML transmission pan compared to the stock pan.

Installation on a 1949 Studebaker Pickup

Rick installed this PML transmission pan on his 1949 Studebaker Pick Up he is building. He is not quite done yet but the transmission is ready to go.

PML TH350 pan on 1949 Studebaker pick up1949 Studebaker pick up restoration in process, PML TH350 deep transmission pan installed   Side view of PML TH350 pan on 1949 StudebakerSide view of PML TH350 deep transmission pan installed   GM TH350 on 1949 StudebakerGM TH350 transmission with PML deep pan, restoration in process on 1949 Studebaker
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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
  • Drain hole and magnetic drain plug for easier, less messy maintenance

All PML transmission pans ship with new mounting bolts and a magnetic drain plug.

If you would like PML to machine your pan for a temperature sending unit, there is an additional charge of $45 .

Find out why you should buy a PML transmission pan.

Learn more about finishes and construction of PML parts.

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