Frequently Asked Questions About Peterbilt 389 Glider Fuel Tank Accessories

What size fuel tanks are compatible with Peterbilt 389 glider kits?

Peterbilt 389 gliders typically accommodate 100, 120, and 150-gallon aluminum fuel tanks. The most common configurations include single 120-gallon tanks or dual 100-gallon setups. Tank diameter is usually 23 or 25 inches, with the 25-inch diameter being standard for most 389 gliders built after 2007. Always verify your frame rail spacing before ordering, as some custom glider configurations may have non-standard measurements.

Do I need special brackets or straps when installing aftermarket fuel tanks on my 389 glider?

Yes, proper mounting hardware is essential for safe installation. You'll need heavy-duty steel tank straps rated for your tank size, anti-slip rubber isolators to prevent metal-on-metal contact, and frame-mounted brackets specific to the 389's rail width. Most aftermarket tanks don't include mounting hardware, so budget an additional $150-300 for quality straps and brackets. Stainless steel hardware is recommended to prevent corrosion, especially in northern climates.

What's the difference between polished aluminum and painted steel fuel tanks for my 389?

Polished aluminum tanks are lighter (reducing weight by 40-60 pounds per tank), resist corrosion better, and maintain their appearance with regular polishing. However, they cost 30-40% more than steel tanks and can show water spots and oxidation if not maintained. Painted steel tanks are more budget-friendly and hide minor damage better, but they're heavier and susceptible to rust if the paint chips. Most 389 glider owners choose aluminum for the weight savings and classic appearance.

Can I install fuel tank accessories like gauge sending units and vents myself?

Basic accessories like sending units and vents can be DIY-installed if you have mechanical experience. Sending units require drilling a precise 5-bolt pattern and ensuring proper float clearance. Rollover vents must be positioned at the highest point of the tank when mounted. However, any modifications involving fuel lines, crossover systems, or draw tubes should be performed by a certified diesel technician to ensure DOT compliance and prevent dangerous fuel leaks.

Which fuel tank steps and hangers work best with Peterbilt 389 gliders?

The most popular options are Peterbilt OEM aluminum diamond-plate steps or aftermarket stainless steel units from manufacturers like Merritt or Jones Performance. Steps should extend at least 6 inches below the tank bottom for safe access. Spring-loaded hangers are recommended over rigid mounts as they accommodate tank expansion and reduce stress cracks. Ensure any aftermarket steps match your tank diameter and include reinforced mounting brackets rated for at least 300 pounds.