Spare Cadillac engines found second life after Stuart tanks

The Cadillac engine once used for the Stuart tank was repurposed for the LVT-3 Bushmaster amphibious assault vehicle. (Flying Heritage Museum photo)

The Cadillac engine once used for the Stuart tank was repurposed for the LVT-3 Bushmaster amphibious assault vehicle. (Flying Heritage Museum photo)

The line hardly ever stopped at the Cadillac engine factory during wartime. Hundreds of new, big V8 engines were crated up each week for use in Stuart tanks. The same goes for General Motors and their never-ending line of newly-created Hydra-Matic transmissions. Two pairs of the powerplants and gearboxes went into each M5 Stuart.

However, as the war moved into its final years, it became clear that the Stuart was obsolete (compared to the Sherman, Chaffee, and others). Now what to do with all that perfectly good horsepower made for a now-defunct tank?

The switch was made easy when the LVT-3 Bushmaster amphibious assault vehicle design got up and running. Each LVT has a set of Stuart engines and transmissions installed, one pair in each sponson on either side of the cargo bay. In the water, the transmission only had first and second gear. On land, the LVT-3 had four speeds (and reverse) and could move at up to 17 miles-per-hour.

Cory Graff is the military aviation curator at Flying Heritage Museum.

Talk to us

More in Life

The all-new Kia Sportage X-Pro model comes standard with all-terrain tires and 17-inch matte black off-road wheels. (Kia)
2023 Kia Sportage has two new models aimed at the outdoorsy

The X-Pro and X-Pro Prestige have all-terrain tires, all-wheel drive, and all kinds of ground clearance.

Women came from all over the Pacific Northwest to “glamp” and raise money to send girls to Girl Scout Camp from Sept. 16-18. The next opportunity to glamp at Camp River Ranch will be Sept. 8-10, 2023. (Jennifer Bardsley)
Women’s glamping retreat raises money to send local girls to camp

I’ve been the camper, the counselor, the Girl Scout leader and the mom. Now, I was the glamper.

People stroll along Edinburgh’s Royal Mile, one of Europe’s most interesting historic walks, as Edinburgh Castle looms in the distance. (Rick Steves' Europe)
Edinburgh, the cultural heart of Scotland, packs a cultural punch

Once a medieval powerhouse, it is today one of Europe’s most lively and festive cities.

Dan Neumeyer peers out the window of his Hummingbird Yurt. (David Welton)
Otherworldly structures constructed on Whidbey Island

The small buildings — yurts, with a Western twist — were built by Earth dweller Dan Neumeyer.

Mark Hall, center, and Casting Crowns perform during the Dove Awards on Tuesday, Oct. 15, 2019, in Nashville, Tenn. (AP Photo / Mark Humphrey)
Music, theater and more: What’s happening in Snohomish County

Casting Crowns performs in Everett, while Graham Nash drops by Edmonds.

All ears: Mukilteo couple provides surgery for kids born without ears

Dr. Prabhat and Trish Bhama are part of a HUGS volunteer team providing treatment for microtia in Guatemala.

MyMyToyStore.com owner Tom Harrison at his brick and mortar storefront on Tuesday, Sept. 6, 2022 in Everett, Washington. (Olivia Vanni / The Herald)
Near-death experience planted seeds for downtown Everett toy store

Former attorney Tom Harrison survived 9/11. It caused him to ask what’s important in life. Today, he runs MyMyToyStore.

2021 Dodge Ram 1500 TRX (Dodge)
2021 Dodge Ram 1500 TRX

The latest salvo is the 2021 Ram 1500 TRX Crew Cab 4x4 pickup.

Mazda CX-30 Crossover (Mazda)
2021 Mazda CX-30 Premium Plus

The crossover seats five adults and delivers the freedom to match active lifestyles.

2022 Kia Sportage Hybride SX Prestige

The 2022 Kia Sportage is marketed as the “ultimate urban SUV.”

Planting containers in the shoulder season

September and October can be tricky times of the year when it… Continue reading

Presented by the Edmonds Driftwood Players, Agatha Christie’s “The Mousetrap” — a murder-mystery that is the world’s longest-running play — will run through Oct. 2 at Wade James Theatre in Edmonds. (Photo courtesy Dale Sutton)
Music, theater and more: What’s happening in Snohomish County

MUSIC Mill Creek Summer Concert Series: The music concludes with Big Dog… Continue reading