How do I know if I have a Turbo 350 transmission?

You’ll know it’s the TH350 if you have the fitting attached to the right frontal side of the transmission. However, it is the TH400 if this fitting is at the transmission’s front-rear side.

How do I identify a TH350 transmission?

Look for the vacuum modulator. It will be on the side of the transmission and have a rubber vacuum line attached to it. If this fitting is on the right front of the transmission, you have a TH350. On the similar TH400 it is attached at the right rear of the transmission.

What does a 350 Turbo transmission look like?

Look at the transmission pan. The Turbo 350 has a basically square pan with one corner cut off. … The part of the pan at the rear of the transmission looks like the lower part of the state of Texas (really). It measures 16 5/8-inches long and 13-inches wide.

How do I know if I have a TH350 or TH400?

Look at the transmission pans on both transmission. Both transmission pans have 13 bolts, but they have a different shape. The TH-350 uses a square pan, with one corner cut off. The TH-400 uses an oblong-shaped pan with one side having a “hump” in the pan and one side is curved while the other two sides are straight.

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How do I identify a GM Turbo 350?

The 350 transmission is easily identified visually, by counting the pan bolts and by locating transmission number. This number contains the year of manufacture, but does not identify the transmission as a THM350.

What year is my TH350 transmission?

The TH350 transmission was introduced in the 1969 model year as the successor to the GM Powerglide automatic transmission. Jointly developed by Chevy and Buick, it is also referred to as the CBC (Chevrolet-Buick Combined) 350. The Turbo 350 quickly become known for its strength, versatility and compactness.

Are all TH350 transmissions the same?

Externally, all the TH350 transmissions look the same; however, internally there are some differences. Depending on the engine size of the car the transmission was removed from, it can have anywhere from 10 to 18 friction discs and 10 to 18 steel clutch plates inside.

How do I identify my Chevy transmission?

Chevrolet transmissions can be manual or automatic. Automatic transmission on a Chevy can be identified in one of two ways: You can look at the size of the pan on the transmission or you can search for the identification number that has been stamped somewhere on the casing.

What vehicles have a Turbo 350 transmission?

The Turbo 350 automatic found its way into Chevrolet Camaros, Pontiac Firebirds and Chewy and GMC trucks. Although the transmission most notably matched GM vehicles with small-block V-8s, it also matched the block-block 396 V-8s, V-6s and the small Iron Duke in-line four-cylinder models.

How do I know what transmission I have?

Open the driver’s side door and find the white card on the side of the door that is filled with small black lettering. This card contains specific details about the year the car was made, its transmission, engine specifications and other details. Underneath or beside the “TR” symbol will be a number code.

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How can you tell a Turbo 350 from a 700R4?

The shape of the oil pans is one way to differentiate between the TH350 and the 700R4. The TH350’s oil pan is shaped like a square with one of its corners cut off, while the 700R4’s oil pan is basically rectangular.

What is the difference between a Turbo 400 and a Turbo 350 transmission?

They are completely different transmissions. The Turbo 400 is larger, longer, and heavier than the Turbo 350 and was designed to live behind higher-torque applications such as big-blocks.

How much horsepower can a TH350 transmission handle?

The Stage 1 TH350 is rated up to 450 hp. Those seeking something a little stronger can check out the Stage 2 version (PN PA35102) that holds 550 hp and retails for $1,500 with a real world street price of $1,175 from most vendors.

What years did GM use Turbo 350?

General Motors TH350

It was developed by GM’s Chevrolet and Buick divisions to replace the two speed Powerglide transmission. The “Turbo 350”, as it is commonly referred to, was used in GMC and Chevrolet pickups until 1986, when it was replaced by the TH700R4, which is a four speed overdrive transmission.

What is a shift kit TH350?

At least half a dozen shift kits are on the market for the TH350 transmission. They all share similar components and are designed to improve shift performance by increasing line pressure, volume of fluid to the clutch packs, and timing of the shifts for less overlap and shorter/ firmer shifts.