Timbren Rear Suspension Kit - Workhorse - GMRP30


Timbren Rear Suspension Kit - Workhorse - GMRP30


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Timbren Rear Suspension Kit for the Chevrolet C30, GMC C35/3500 and Workhorse P30chassis.

This SES Suspension Upgrade fits the rear suspension of a Chevrolet C30, GMC C35/3500 and Workhorse P30 chassis (see below for full list of applications). Each laser cut piece of steel is precision bent and powder-coated to ensure a quality fit. We’ve engineered our hollow rubber springs to deliver a progressive spring rate. In other words, the more weight that pushes down on the rubber springs the harder they work to prevent rear end sag. Whether you’re pulling a trailer or carrying a heavy load in the back of your vehicle, our hollow rubber springs adjust automatically to keep the vehicle level at all times.

This kit is rated at 6000 lbs. capacity. Even though you’re increasing the spring rate by adding this upgrade, this does not increase the GVWR (Gross Vehicle Weight Rating). Please make sure that the load does not exceed the GVWR set by the manufacturer.

Product Features

  • Eliminate Vehicle Squatting & Sagging
  • Cushion Road Shocks
  • Improve Handling
  • Satisfaction Guarantee
  • Lifetime Warranty


  • Chevrolet C30 Pickup 1968-1972 2WD Only
  • Chevrolet P30/32/42/60 1975-1999. For Motorhome Chassis
  • Chevrolet B Chassis 1975-1999. For Motorhome Chassis
  • GMC C35/3500 Pickup 1968-1972 2WD Only
  • Workhorse W42 2006-2021. All Models
  • Workhorse P30/32, W20 2000-2005. All Models with Coil Spring Front Suspension
  • Workhorse P30/42/60 2000-2005. All Models with Bump Stop on Frame

Tech Specs

Weight: 9.23 lbs

Made in: Canada

Mill Supply has been the #1 supplier of step van parts for over 30 years. If you have a Workhorse, Utilimaster, Grumman, Morgan Olson, Supreme, International or other type of walk-in van you have landed on the right page. You will not find a more complete listing of parts for stepvans anywhere! With research and development on-the-go, new products are constantly being added to keep up with the growing industry. You can count on great customer service, fast shipping, and discount prices when you shop with us. It doesn't matter if you use your truck on-the-job, for deliveries, or run a food truck, you can count on Mill Supply to keep your vehicle in top shape. We distrubute parts for Todco, Whiting, Velvac, Timbren and Kason. If you have any questions don't hesitate to either contact us via email or give us a call at 800-888-5072 between 8:00 a.m. - 5:00 p.m. E.S.T. and one of our experienced representatives will be happy to help you.



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