Peterbilt 357/378 Shift Plates

Frequently Asked Questions About Peterbilt 357/378 Shift Plates

What is a shift plate and what does it do on my Peterbilt?

A shift plate is the decorative and functional cover that surrounds the gear shifter boot at the base of the shifter lever inside the cab. It covers the opening in the floor or dash where the shift linkage passes through, providing a finished look while also helping to keep dust, moisture, and debris out of the cab. On Peterbilt 357 and 378 models, these plates are often chrome or stainless steel and can include engraved shift patterns or custom designs to match the interior trim.

Will a shift plate made for the 357/378 fit my truck without modification?

Shift plates are designed to match the factory bolt pattern and shifter boot opening used on Peterbilt 357 and 378 models, so fitment is generally direct for these chassis. However, because transmission types and shifter configurations can vary (for example, different linkage styles or aftermarket shifters), we recommend comparing the bolt hole spacing and boot opening size on your current plate before ordering to confirm an exact match.

What materials and finishes are available for these shift plates?

Most shift plates in this category are made from stainless steel or chrome-plated steel for durability and corrosion resistance in a working truck cab. Finish options typically include polished chrome, brushed stainless, and sometimes textured or engraved patterns. Chrome finishes offer a bright, mirror-like look, while brushed stainless tends to show fewer fingerprints and minor scratches over time.

How difficult is it to install a replacement shift plate?

Installation is typically straightforward and can be done with basic hand tools. In most cases, you will remove the shifter boot retaining screws, lift the boot to access the old plate, unbolt the worn or damaged plate, and swap in the new one before reattaching the boot. Since layouts can differ slightly by cab configuration, it helps to take photos before disassembly so you can reference the original setup during reinstallation.

How do I keep my shift plate looking good over time?

Regular wiping with a soft cloth helps prevent buildup of dust, grease, and grime from daily handling. For chrome plates, a non-abrasive chrome cleaner works well to maintain shine, while brushed stainless plates can be cleaned with a mild soap and water solution followed by a dry cloth. Avoid abrasive pads or harsh chemical cleaners, as they can dull the finish or create scratches over time.