How do you tell what year TH350 I have?

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 year did the TH350 come out?

1969
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.

What year is my transmission?

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.

What year vehicles have a Turbo 350 transmission?

To name a few, this transmission was used in the Caprice, Chevelle, Corvette, Blazer, and Nova. The TH350 was introduced in 1969 as a replacement to the Powerglide 2 speed automatic transmission. While the phase-in began in 1969, it was not complete until the 1973 when the Powerglide fully phased out.

How do I know if my TH350 is good?

If not drivable, look at fluid color and also smell the fluid. Burnt fluid will have an obvious odor to it. I’ve had good luck over the years picking good tranny’s just by smell. Pulling the pan is also a good thing to do.

How do I know if I have TH350 or TH350C?

Another way to tell the difference between a 350 and a 350C (lockup), is to look at the input shaft. The 350C will have snout with O-ring and a fluid passage drilled down the center for the clutch. The 350 shaft will be solid with a blunt end (no snout/fluid passage).

How much horsepower can a TH350 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 is the difference between a TH350 and a TH350C?

A TH350 can be turned into a lockup transmission with an aftermarket kit and converter, but a TH350C CANNOT be tunred into a non lockup because it will burn up the transmission. So, long story short, as far as shift kits go, there’s no difference between a TH350 and TH350c for the same year.

Can I tell what transmission I have by the Vin?

Does VIN Number Tell Me About My Transmission? Yes, the Vehicle identification number reveals information about the transmission of the vehicle. The Vehicle identification number is a 17-digit number where each of them has a unique meaning that is associated with the vehicle.

How much horsepower can a Turbo 350 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. Both transmissions come with a standard one-year warranty.

Are all Turbo 350 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 to identify a GM TH350 automatic transmission?

Identifying the TH350 the Easy Way. Certainly the easiest way to identify a GM automatic transmission is by the bolt pattern. The TH350 has a 13 bolt pan gasket. This is a fine way to whittle what you have in front of you. If you counted 13, you are either looking at the Turbo 350 Transmission or the Turbo 400. Look at the TH400 pan gasket.

How can I tell if my transmission is a 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. Count the number of bolts on the transmission pan.

Where is the oil pan on a th 350 transmission?

This is the pan bolted to the bottom of the transmission. If you count 13 bolts, you’ve narrowed your transmission model down to only two: a TH350 or TH400. Look at the shape of the transmission oil pan. The pan on a TH 350 is square in shape, with one corner cut off, resulting in a five-sided pan.

How many quarts does a Turbo 350 transmission take?

The TH350 takes about 4 quarts in the pan, and then requires additional based on the torque converter being used. When combined with a 9.5” converter, the overall requirement is around 10 quarts. The Turbo 350 transmission, commonly known as the TH350, was a 3 speed automatic transmission that began phasing out the GM Powerglide in 1969.

When did GM start using the TH350 transmission?

GM used the TH350 in their vehicles starting in 1968 and was found in almost all rear-wheel drive GM vehicles through 1984. If you have a GM car that falls within these model years, there is a good chance you have a TH350. With a few easy steps, you can identify whether your car has a TH350 transmission or not.

Why is it important to know TH350 transmission identification?

Its identification, for instance, helps you to differentiate this one-piece unit from other transmissions launched by General Motors. And the super-tuning of this unit ensures that you can improve its performance to be a ride worth taking on fast and hard spins.

How can I tell if my th 350 transmission is working?

Look at the shape of the transmission oil pan. The pan on a TH 350 is square in shape, with one corner cut off, resulting in a five-sided pan. Measure the length of the transmission from the front, using your measuring tape, where it bolts to the rear of the engine to the end of the transmission, where the tailshaft housing bolts on.

Where do you find the year of manufacture on a 350 transmission?

The top number on the accumulator cover gives the last two digits of the year of manufacture. The code below the year of manufacture is specific to the original engine and the transmission’s calibration code. Compare the transmission to a visual chart similar to the one found on the Roadkill Customs website (see Resources).