Frequently Asked Questions About Peterbilt 352 Fuel Tank Senders

Will these fuel tank senders fit my specific year Peterbilt 352?

Our fuel tank senders are designed to fit Peterbilt 352 models from 1969 through 1979. However, there were minor variations in tank configurations during these years. We recommend checking your existing sender's mounting pattern (typically 5-hole SAE standard) and comparing the ohm range (usually 0-90 ohms or 240-33 ohms) to ensure compatibility. If you're unsure, contact us with your VIN and we'll help verify the correct match.

What's the difference between mechanical and electric fuel senders, and which one do I need?

Peterbilt 352 trucks came with electric fuel senders that connect to your dash gauge. The main differences you'll encounter are in the ohm range and float arm length. Most 352 models use either a 0-90 ohm sender (empty to full) or a 240-33 ohm sender. Check your gauge specifications or test your existing sender with a multimeter to determine which type you need. The float arm length varies based on tank depth - standard lengths are 12", 15", and 19".

How difficult is it to install a new fuel sender without dropping the tank?

While it's possible to replace the sender without dropping the tank on most Peterbilt 352 models, it requires careful maneuvering. You'll need to disconnect the fuel lines, remove the 5 mounting bolts, and carefully extract the old sender at an angle. The biggest challenge is avoiding damage to the float arm during removal and installation. Having a second person help guide the float arm can prevent bending. Always use a new gasket and apply fuel-resistant sealant to prevent leaks.

Why does my new fuel gauge sender give inaccurate readings?

The most common causes of inaccurate readings are: mismatched ohm ranges between the sender and gauge, a bent float arm during installation, or grounding issues. First, verify you have the correct ohm range sender for your gauge. Second, ensure the sender is properly grounded through the tank - clean all mounting surfaces to bare metal. If readings are reversed (showing full when empty), you likely have a sender with reversed ohm values. Some aftermarket senders require calibration adjustments at the gauge.

What material and quality differences should I expect between OEM and aftermarket senders?

OEM-style senders typically feature brass or stainless steel construction with reinforced float arms and precision-wound resistors. Quality aftermarket units use similar materials but may have slightly different float designs. Look for senders with stainless steel hardware, fuel-resistant gaskets, and sealed electrical connections. Avoid units with plastic components in contact with fuel. The main difference is usually in the warranty - OEM-style typically offers 1 year while some aftermarket brands provide 90 days.