Kit updates vintage GM pickups with manual shifting

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Saying that the 1988-98 Chevrolet and GMC pickups “started the Sport Truck movement,” American Powertrain has rolled out what it calls “high performance manual transmission options” for those vehicles.

The new 1988-98 Chevy/GMC (OBS) truck 5 and 6-speed kits “feature the Tremec TKO 5-speed and Magnum 6-speed coupled with all the parts needed to successfully install these transmissions with an excellent shift position for both bench and bucket seat applications,” the company said.

5- and 6-speed manual gearboxes available | American Powertrain photo

“No modifications are required to the tunnel for 5 or 6-speed,” American Powertrain added.

“Both kits allow use of the stock crossmember with only a few holes to drill in the frame making installation a breeze,” the company said in its announcement. “By using the stock crossmember and moving it down the frame also helps with LS engine swaps as well. 

“Additionally, this kit can use the stock clutch master and pedal with adapter line to use American Powertrain’s Hydramax Hydraulic clutch sleeve. 

A Wilwood bolt-in master cylinder upgrade is available. 

Included in the American Powertrain kit are an electronic speedometer solution, VSS set-up for EFI, pilot bearing, weather-sealed reverse light wiring, complete seamless DOM driveshaft, shift knob, hardware and instructions.  

American Powertrain adds that it has all the parts needed if someone is starting with a truck equipped with an automatic transmission or with an empty chassis.

It adds that Pro-Touring upgrades also are available with a balanced aluminum driveshaft and billet White Lightning shifter.

Kits start at $3,495. For more information, visit the American Powertrain website.

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A former daily newspaper sports editor, Larry Edsall spent a dozen years as an editor at AutoWeek magazine before making the transition to writing for the web and becoming the author of more than 15 automotive books. In addition to being founding editor at ClassicCars.com, Larry has written for The New York Times and The Detroit News and was an adjunct honors professor at the Walter Cronkite School of Journalism and Mass Communication at Arizona State University.

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