Tuthill Corporation
- Manufacturers of Reyco/Granning suspensions for truck, trailer, RV, bus and emergency vehicle applications.
- http://transport.tuthill.com/

Dallas Smith Corp.
- Manufacturer of axleless air ride and leaf spring suspension systems.
- http://dallassmithcorp.com/

SM Schoettle
- Original equipment supplier for German engines. Manufacturers valves, piston rings, guides and other products.
- http://www.sm-germany.com/

Indian Head Industries
- Manufactures spring brakes and service chambers for air-braked heavy duty vehicles. Also supplies double-diaphragm and piston type actuators.
- http://www.indianheadindustries.com/

Safer Corporation
- Products for maintaining predetermined tire pressure on trucks, trailers and buses.
- http://www.saferco.com

GMC Commercial Truck & Bus Repair
- GMC Commercials Ltd, based in Wickford, Essex. Site offers information of service and repair facilities along with opening hours and contact details.
- http://www.gmc-commercials.co.uk

Shuntong Clutch Co. Ltd.
- Manufactures commercial automotive and truck parts in China.
- http://www.accel.com.cn/

Smoothwheel
- Smoothwheel's revolutionary new design in lightweight, hub-piloted 10 hole aluminum wheels is good looking, easy to clean and designed to be compatible with steel or aluminum inner wheels.
- http://www.smoothwheel.com/

China Yuhuan Xinlong Machinery Co., Ltd.
- Manufacturer of slack adjusters, s-camshafts, camshaft kits, brake lining, axle, truck brake parts, automotive and bus parts. Located in China.
- http://www.yhxl.com

BEAM
- Manufacturer of horns, security systems, voltage reducers and accessories. Offers English and Italian versions.
- http://www.beam.it/

Myriad Parts
- Distributors of transport refrigeration spares, air conditioning units and compressors.
- http://www.myriadparts.com

Smartbrake
- Manufacturer of exhaust brakes and brake retarders for diesel engines. Locations in US and England.
- http://www.smartbrake.com

SAF Systems
- Manufacturers axles in numerous weights for loads ranging from 6 to 16 tonnes.
- http://www.saf-achsen.de/

Cush Corp.
- Manufactures air ride suspension equipment for the truck, trailer, and bus industry.
- http://www.cushcorp.com/

Hutchens Industries
- Produces trailer suspensions, pin release and trailer slider systems for the heavy-duty trucking market.
- http://www.hutchensindustries.com/

Fontaine International
- Manufactures fifth wheel coupling devices used on Class 6, 7 and 8 truck tractors to connect trailers.
- http://www.fifthwheel.com/

Mollebalestra SpA.
- Manufactures multi-leaf and parabolic springs, air suspension links and stabilizer bars for industrial vehicles. Based in Italy.
- http://www.mollebalestra.it/

Multi Tech Engineering
- Sells and manufactures all type of parts for trailers, fuel tankers, aircraft refuellers, trucks, buses, tractors and specialized vehicles. Based in Karachi, Pakistan.
- http://www.multitech.20m.com/

Cummins Westport Inc.
- Alternate fuels joint venture created to develop and market low emissions, high performance alternative fuel engines for use in trucks and heavy vehicles.
- http://www.cumminswestport.com/

Knorr-Bremse AG.
- A worldwide producer of pneumatic, hydraulic and electronic braking systems, and chassis management systems for commercial vehicles.
- http://en.knorr-bremsesfn.com/

AsasKa Ltd. Co.
- Manufactures and exports air brake components, rubber parts and air springs for European heavy duty trucks and trailers. Based in Istanbul, Turkey.
- http://asaska.com/

Diversified Products Mfg.
- Manufactures pushbumpers, towing dollies, tow slings, and other truck and wrecker accessories in Jacksonville, FL.
- http://www.pushbumper.com/

Haldex Brake Systems
- A global supplier of brakes, hydraulic systems, wire products and traction systems for trucks, cars and industrial vehicles.
- http://www.brake-eu.haldex.com/

Tramec
- Vertically integrated manufacturing company, provides heavy duty parts for the truck and trailer industry worldwide. Based in Iola, KS.
- http://www.tramec.com/

Foote Axle and Forge LLC.
- Manufactures axle shafts, input and output shafts, and specialty parts for the heavy duty truck industry.
- http://www.footeaxle.com/

Pacbrake
- Supplies engine brakes and exhaust retarders for diesel engines.
- http://www.pacbrake.com/

Isspro Inc.
- Manufactures electronic instruments and controls used in heavy duty vehicles. Also produces products for automotive and marine use.
- http://www.isspro.com/

Hendrickson International
- Designs and manufactures suspension systems and components for heavy duty trucks and trailers.
- http://www.hendrickson-intl.com/

Holland Group Inc.
- Manufactures fifth wheels, pintle hooks, landing gear, and trailer parts for the transportation industry.
- http://www.thehollandgroupinc.com/

Allison Transmission
- Designs and manufactures medium and heavy duty electronically controlled automatic transmissions. Site includes sales and service locator.
- http://www.allisontransmission.com/

Accuride Corporation
- Large manufacturer of steel and aluminum wheels. OEM supplier of medium and heavy duty wheels. Corporate headquarters located in Evansville, Indiana.
- http://www.accuridecorp.com

Sammi Metal Products Co.
- Manufactures various forging products including front axles and crank shafts for buses and trucks. Located in Korea.
- http://www.sammiforge.co.kr/

Cummins Engine
- An OEM engine manufacturer.
- http://www.cummins.com/

Eaton Truck Components
- Parts pricing, service manuals and bulletins, distributors, warranty and lubrication information.
- http://www.truck.eaton.com