Upgrading to a Hydraulic Throwout Bearing and Clutch

January 23, 2018

Hydraulic upgradeTotal Knock Out!

American Powertrain gets you into a high-torque capacity (and efficient!) five-speed TKO 600 in a weekend

Super Chevy / Jim Smart / Jan. 2, 2018

(Photos by Jason Scudellari)

There’s nothing quite like the crisp gear whine and snap that go with an old-fashioned Muncie four-speed transmission, a powerful engine, the open road and a delightful summer day. However, the downside to a classic straight-drive manual four-speed stick is fuel consumption along with the associated wear and tear. Unless you’re just bent on nostalgia and pumping gas there is surely a better way to get there.

American Powertrain enables you to blend the swift-slippery classic lines of a C1, C2 or C3 Corvette with the great efficiency and function of a modern five-speed transmission. What’s more, you can get this swap done in a weekend if you stay on it.

Let’s begin with the heart and soul of this swap: the TREMEC TKO 600 for street and strip use. The TKO 600 is a popular replacement for outdated straight-drive four-speeds because it is an extremely durable gearbox capable of handling up to a constant load of 600 lb-ft of torque. This means the TKO 600 can handle the twist of most small- and big-block Chevys, not to mention factory LS engines without breaking a sweat.

With the TREMEC TKO 600 you get a 26-spline input shaft, 4616 chromoly gears and shafts, one-piece countershaft, brass cage roller bearings, full factory warranty (American Powertrain extends the factory TREMEC warranty to two years), with 2.87:1, 1.89:1, 1.28:1, 1:1, and 0.64 ratios. These features make the TREMEC TKO 600 from American Powertrain perfect for the commute, weekend cruising or all-out drag or road racing.

The Pro-Fit TREMEC TKO 600 five-speed transmission kit is engineered to fit your classic Corvette chassis and engine without special modifications. Everything you’re going to need is provided in the American Powertrain Pro-Fit kit.

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