Art Morrison Enterprises, Inc. — Ford 9-inch housings
http://www.artmorrison.com/

Auburn Gear
http://www.auburngear.com/

Canfield Cylinder Heads — Ford 9-inch cases
http://www.canfieldheads.com/

Chassis Engineering, Inc.
http://www.chassisengineering.com/

Chris Alston's Chassisworks — fabricated housings
http://www.cachassisworks.com/

Chrisman Driveline Components
http://www.chrismans.com/

Competition Engineering — fabricated housings
http://www.competitionengineering.com/

Concept Pattern — cast aluminum differential covers
http://www.conceptpattern.com/

Currie Enterprises
http://www.currieenterprises.com/

CWI — Concours West Industries — quickchange IRS
http://www.cwiinc.com/

Dana Corporation
http://www.dana.com/

Davis Technologies — limited-slip differentials
http://www.moretraction.com/

DPI — Dan Press Industries — limited-slip differentials
http://www.dpiracingproducts.com/

DTS — Drivetrain Specialists
http://www.drivetrainspecialists.com/

Dutchman Motorsports, Inc.
http://www.dutchmanaxles.com/

Eaton Automotive
http://www.eaton.com/

Frankland Racing Supply — quick-change rear ends
http://www.franklandracing.com/

The Hot Rod Works, Inc. — parts for 1932-1948 Fords
http://www.hotrodworks.com/

Kugel Komponents
http://www.kugelkomponents.com/

Lenco Equipment Company — floater rear ends
http://www.lencoracing.com/

Ken Lowe Race Cars — flanged and floater rear ends
http://www.kenlowe.com.au/

Mangus Precision Pumps — rear end cooler pumps
http://www.manguspump.com/

Jim Meyer Racing
http://www.jimmeyerracing.com/

Mittler Bros. Machine & Tool — fabricated housings
http://www.mittlerbros.com/

Moser Engineering
http://www.moserengineering.com/

Motive Gear
http://www.motivegear.com/

Pro-Filer Performance Products
http://www.profilerperformance.com/

Randy's Ring & Pinion
http://www.ring-pinion.com/

Ratech
http://www.ratechmfg.com/

Ryane Motorsports — independent rear suspension
http://www.ryanemotorsports.com/

Seals-it — axle and hub seals
http://www.sealsit.com/

Schreiner Enterprises — floater rear ends
http://www.9inchfloater.com/

Darryl Smith Race Cars
http://www.darrylsmithracecars.com/

SPE — Speed Products Engineering — floater parts
http://www.speedproductseng.com/

Speedway Engineering — quick-change rear ends
http://www.1speedway.com/

Stock Car Products — floater rear ends
http://www.stockcarproducts.com/

Strange Engineering — axles and rear ends
http://www.strangeengineering.net/

Summers Brothers Racing
http://www.summersbrothersracing.com/

Superior Axle & Gear
http://www.superioraxlegear.com/

Taylor Race Engineering, Inc. — sports racing transaxles
http://www.taylor-race.com/

TCS Performance — The Converter Shop
http://www.tcsperformance.com/

Tex Racing Entersprises, Inc.
http://www.texracing.com/

Tiger Rear Ends — quick-change rear ends
http://www.tigerrearend.com/

Tom's Differentials
http://www.tomsdifferentials.com/

Trick Titanium — titanium rear axle housings
http://www.tricktitanium.com/

U.S. Gear — gears and limited-slip differentails
http://www.usgear.com/

West Coast Differentials, Inc.
http://www.differentials.com/

Mark Williams Enterprises, Inc.
http://www.markwilliams.com/

Winters Performance Products — quick-change rear ends
http://www.wintersperformance.com/

Wilson Welding and Machine — early Ford quick-changes
http://www.wilsonweldingandmachine.com/

Zexel Torsen, Inc.
http://www.torsen.com/