Frequently Asked Questions About Peterbilt 352 Brake Chambers & Acc.
Will these brake chambers fit my specific year Peterbilt 352?
Most brake chambers for the Peterbilt 352 are compatible with models from 1969 through 1981. However, there were minor variations in mounting brackets and air line connections between early models (1969-1975) and later models (1976-1981). Always verify the type number on your existing brake chamber (typically Type 20, 24, or 30) and measure the mounting bolt pattern before ordering. If you're unsure, our customer service team can help identify the correct part with your OEM number.
What's the difference between standard and long-stroke brake chambers?
Standard brake chambers typically have a 2.5-inch stroke, while long-stroke chambers have a 3-inch stroke. Long-stroke chambers provide better braking performance and are required on many newer applications for DOT compliance. For Peterbilt 352 models, standard chambers are usually sufficient unless you're hauling heavy loads regularly or have upgraded to larger brake shoes. Long-stroke chambers require different slack adjusters and may need bracket modifications on some 352 models.
How difficult is it to replace brake chambers on a Peterbilt 352?
Brake chamber replacement is a moderate difficulty job that takes 1-2 hours per wheel. You'll need basic hand tools, a way to safely support the vehicle, and the ability to cage the spring brake before removal. The main challenges include accessing the mounting bolts in the tight wheel well space and properly bleeding the air system afterward. Many customers report the hardest part is removing corroded mounting bolts on older trucks. We recommend using penetrating oil a day before the job and having replacement mounting hardware on hand.
Are aftermarket brake chambers as reliable as OEM Bendix or MGM units?
Quality aftermarket brake chambers from manufacturers like Gunite, Haldex, and TSE can match OEM performance when properly selected. The key is choosing chambers that meet FMVSS-121 standards and have proper corrosion protection. Avoid the cheapest options as they often use thinner diaphragms and lower-grade springs that fail prematurely. For Peterbilt 352 applications, we recommend chambers with aluminum housings rather than steel for better corrosion resistance, especially if you operate in areas using road salt.
What other components should I replace when changing brake chambers?
When replacing brake chambers, inspect and consider replacing the clevis pins and bushings (worn ones cause poor brake response), air hoses if they show weather cracking, and slack adjusters if they're not holding adjustment. It's also the perfect time to check your brake shoes and drums since you're already working in that area. Many customers find that replacing the rubber hose connections between the chamber and steel air lines prevents future air leaks and emergency roadside repairs.
