Get Heavy-Duty Drivetrain Components for the Peterbilt 387
Your Peterbilt 387âs drivetrain is what keeps power flowing from the engine to the wheels. When itâs working right, your truck pulls strong, shifts smooth, and gets the job done. When itâs notâitâs time for upgrades or replacements. Weâve got the aftermarket drivetrain parts you need to stay road-ready and rolling strong.Get Smoother Power Transfer From of Your Rig
Here are some of the drivetrain parts you can often find in stock: - Camshafts: Keep your Peterbilt 387 engine breathing right and running smooth - Universal joints (U-joints): Allow the driveshaft to flex and spin without binding - Yokes and bearings: Secure connections and reduce vibration - Differential components: Manage power between your drive axles, especially in turns or rough conditions - Seals, gaskets, and repair kits: Keep oil in and contaminants out Our lineup of brake parts and accessories arenât just replacements, theyâre upgrades. Built tough to handle daily stress, long hauls, and big torque. Perfect for routine maintenance, major repairs, or full-on rebuilds. You can pair your drivetrain components with sturdier Peterbilt 387 frame and chassis upgrades for a higher quality driving experience. Whether you're chasing smoother rides, better fuel efficiency, or fewer breakdowns, quality drivetrain parts make a big differenceFrequently Asked Questions About Peterbilt 387 Drivetrain Parts
What years and models are compatible with Peterbilt 387 drivetrain components?
Peterbilt 387 drivetrain parts are specifically designed for model years 1999-2010. Most transmission components, driveshafts, and differentials are interchangeable within these years, but always verify your specific OEM and component numbers. Parts from the 379 and 385 models may also fit, but mounting points and lengths can vary. We recommend checking your existing part numbers or contacting our team with your OEM for exact compatibility.
What are the most common drivetrain failures on the Peterbilt 387, and which parts should I keep on hand?
Based on customer feedback, the most frequent issues include U-joint wear (especially on the forward driveshaft), carrier bearing failures around 300,000-400,000 miles, and transmission output seal leaks. We recommend keeping spare U-joints, carrier bearings with mounting hardware, and output seals in stock. Many drivers also report clutch brake wear on manual transmissions, so having a replacement clutch brake can prevent roadside downtime.
Can I upgrade my Peterbilt 387 from a 10-speed to 13-speed transmission, and what parts are needed?
Yes, upgrading from a 10-speed to 13-speed transmission is possible but requires several components beyond the transmission itself. You'll need a compatible bellhousing, potentially a different driveshaft length, updated shift linkage, and ECM programming. The existing clutch may work if it's a 2-inch input shaft, but verify specifications. Labor typically runs 8-12 hours for a complete swap. Consider your rear axle ratios as well, as they may need adjustment for optimal performance.
How do I identify the correct driveshaft length and specifications for my Peterbilt 387?
Driveshaft specifications vary based on wheelbase, suspension type, and transmission configuration. The most accurate method is measuring from the transmission output yoke to the differential input yoke at ride height. Standard lengths range from 50-75 inches for the rear shaft. Look for stamped numbers on your existing driveshaft tube for series type (1710, 1810, etc.). Critical measurements include collapsed length, tube diameter, and U-joint series. When in doubt, provide your OEM and we can reference OEM specifications.
What preventive maintenance can extend the life of my Peterbilt 387 drivetrain components?
Regular greasing of U-joints every 5,000-7,000 miles prevents premature wear. Check driveshaft balance weights haven't shifted and inspect for dents or damage monthly. Change differential fluid every 100,000 miles or annually, and transmission fluid based on severity of use (typically 250,000-300,000 miles for highway use). Monitor carrier bearing play during pre-trip inspections - any clicking or excessive movement indicates replacement is needed. Keep driveline angles within 3 degrees to prevent vibration damage.
