Automatic Transmission Design, Inc.
W140N10145 Fond Du Lac Ave.
Germantown, WI 53022
P: (262) 251-7777
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Hours of Operation:
Monday - Friday: 8 AM - 6 PM CST
Closed Saturday & Sunday
Automatic Transmission Design Front Sign image

Map & Directions to ATD

Driving Directions:

From Highway 45:
Take Exit 52 for County Line Road/Hwy Q.
Travel East for 3 miles to Highway 145/Fond Du Lac Ave.
Turn Left/North, and go approximately 1 mile (sign will be on West/Left side of road).
Turn Left onto Sunberry Road, and first left into parking lot.
From Germantown:
Travel East of Central Germantown on Hwy 167/Mequon Road to Highway 145/Fond Du Lac Ave.
Turn Right/South, and go approximately 2 miles (sign will be on West/Right side of road).
Turn Right onto Sunberry Road, and first left into parking lot.
GPS Coordinates:
43.202615, -88.084071
+43° 12' 8.61", -88° 5' 3.39"

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About ATD

Automatic Transmission Design (ATD)

is a full service automotive repair shop located in Germantown, WI - just minutes from Milwaukee.
ATD specializes in automatic and manual transmission repair & service, transfer case/four wheel drive repair, differentials/rear ends, and other drivetrain service. We also specialize in custom service for classic, collector, and custom cars.
If you can dream it, we can do it!

Automatic Transmission Design manufactures & builds high performance racing transmissions, torque converters, and valvebodies for drag racing, off-road racing, circle track racing, and more!
All of our racing torque converters are hand assembled by a trained technician in-house to match your specific engine and application needs.
Don't buy an off-the-shelf piece when you can have one custom built for you!

Automatic Transmission Design is proud to be a locally owned small business serving all of Southeastern Wisconsin, as well as national and international customers.

ATD Management Team:

Mike Hipster Hohnstein Image

Mike "Hipster" Hohnstein
President & Founder of ATD.
Started in 1981 with Hipster's Brake & Hipster's Garage, which later became Automatic Transmission Design.
Inventor, Innovator, and Patent Holder.
Developer of the innovative Hipster's Brake transbrake valvebody.
Charlie McCormick Image

Charlie McCormick
Co-Owner & General Manager of ATD.
Started with ATD in 1990.
Over 38 years of experience in the automotive field.
Certified ASE Master Technician for over 35 years - at one point the youngest in Wisconsin to achieve this prestigious certification.
Over 29 years of experience with transmission service.
Motorsports & classic car specialist.
Scott Moore Image

Scott Moore
Co-Owner & Service Manager of ATD.
Started with ATD in 2000.
Over 38 years of experience in the automotive field and with transmission service.
ASE & ATRA Certified.
Builds some of the most complex transmissions on the road today.