What is the gear ratio for a Powerglide transmission?

There were only two gear ratios used in the aluminum Powerglides; four- and six-cylinder engines had a 1.82:1 low gear with a 1.00:1 high; reverse gear was 1.82:1. The eight-cylinder engines used a 1.76:1 low gear and 1.00:1 high.

What is the gear ratio of a 2 speed Powerglide?


Powerglide (TCI) 1.80 1.00
Powerglide (TCI) 1.92 1.00
Powerglide (TCI) 1.98 1.00
TH350 (OEM) 2.52 1.52

Why is the Powerglide so good?

The Powerglide has just two speeds: low and high. And its durability allows it to run 100 to 150 races before needing a rebuilding that takes only two hours, Coughlin says. “It’s bulletproof, simple and easy to customize,” he says.

How much horsepower can a 2 speed Powerglide handle?

A powerglide can indeed handle 440 hp, hust put a good cooler on it especially if you are putting a higher stall converter in it.

How do I know if my transmission is 2 speed Powerglide?

Identifying a Powerglide Transmission

Identify early cast-iron Powerglides by locating the word “Powerglide,” stamped on the passenger side of the transmission. Another identification feature is that the cast-iron models have no pan on the bottom of the transmission.

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Is powerglide a good transmission?

After all, most short track racers only need a high and low gear. The most common automatic transmission used in oval racing is, without a doubt, the General Motors Powerglide. … Just like any transmission, be it automatic or manual, reducing slippage, friction, and rotating mass usually results in better performance.

What’s better powerglide or TH400?

Powerglide Versus TH400

In these types of applications, a Powerglide is the ultimate in consistency as well. On the other hand, for cars that will see any street time at all, a TH400 is a better option. In race cars, compared to a Powerglide a TH400 is better suited for cars with large tires and taller rearend gearing.

How much horsepower can a stock Powerglide handle?

With all the available upgrades, both the Powerglide and the TH400 are capable of withstanding an incredible 3,500 horsepower.

Will a Powerglide bolt up to a 350?

The powerglide should be fine with the 350 unless it is an air cooled version.

How do you shift Powerglide?

To shift from Park directly to Drive, depress the release button and then hold it down while moving the shifter lever, and the shifter lever will automatically stop in the Drive position. Once you release the button, the shifter lever can be moved into low gear.

Does gear ratio affect horsepower?

A higher numeric axle ratio (4.11:1) keeps the engine running in the higher horsepower range, thus improving performance.

Are 3.73 gears good for highway?

Rear end gears (2.79’s, 3.00’s, 3.25’s, etc) are great for freeway driving, bit not good for 0-60 MPH or accelerating from a dead stop. Shorter gears (higher numbers) are much better suited for accelerating, such as 3.55, 3.73, 3.91’s, 4.11’s etc. Always remember, for very “give” there is a “take”.

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What gear ratio is best for fuel economy?

For instance, a 3:31 gets better fuel economy than a 3:73. On the other hand, a 3:73 or perhaps a 4:10 will tow much more, while fuel economy greatly drops. The most popular rear end ratio in trucks today is the 3:55, which sort of averages towing power and fuel economy.