Frequently Asked Questions

Yes, daily!  Whether you have an automotive shaft that needs to be Ford at one end and Toyota at the other, or are in need of several industrial shafts for a one-of-a-kind machine, we build shafts to fit your specifications.  We can make shafts in all lengths, using all different series (1310, 1330, etc.).  We also make both steel and aluminum custom drivelines.

Exact measurements are absolutely necessary for the proper manufacturing of a driveline.  If the measurements are not accurate, drive shafts can break and accidents can occur.  Because of the large variety of shafts that exist and the endless tasks these drivelines are used for, we ask that you call and speak to one of our trained staff.  Once we have determined the type and use of your driveline, we will personally walk you through the measurement process.

If you need help measuring your driveshaft, you can refer to our driveshaft measuring guide or contact us, and we’ll be more than happy to assist you! 

Yes!  We use a machine that mounts and spins the driveshaft exactly as it goes in the vehicle.  This allows us to balance a shaft at speeds up to 3300 RPM.

A one-piece steel shaft can’t be longer than 72″ from the center of the u-joint at one end to the center of the u-joint at the other end.  If you have need for a driveline to be longer than 72″, it can be converted to a 2-piece driveshaft or built using aluminum tubing.

Yes!  We sell both Spicer and Neapco non-greasable u-joints.  Most popular is Neapco’s Performance Dynamics u-joints.  These non-greasable u-joints are made especially for aluminum driveshafts.  Their oxidized caps don’t rust and help the u-joints fit tighter in the yoke.

We produce high-quality steel and aluminum racing shafts and will paint or finish-out by request.

Torque is also called moment or moment of force.  It describes the rotational force down a shaft and measures how strong the shaft needs to be and how much pressure will be exerted.  An accurate estimation of how much torque a machine has is necessary to ensure the proper production of a shaft.

CV stands for constant veloicty. Commonly found in 4×4 vehicles, these shafts handle more angle than two joint shafts and reduce vibration.

A drive shaft (also known as a driving shaft, propeller shaft, or Cardan shaft) is a crucial mechanical component of a drivetrain that transmits power from the engine to the wheels, allowing the vehicle to move. It transmits torque and rotation and is typically used to connect other components of a drivetrain that can't be connected directly due to either distance or the need to allow relative movement between them. Drive shafts are found in automobiles, heavy-duty trucks, agricultural equipment, and industrial machines—ensuring smooth and efficient movement.

Without a properly functioning driveshaft, your vehicle cannot deliver power effectively, leading to performance issues, potential breakdowns, and other component failures.

Drive shafts are used in automobiles, heavy-duty trucks, agricultural equipment, and industrial machinery. However, the most common type of driveshaft is the automotive shaft, found in rear-wheel-drive (RWD), all-wheel-drive (AWD), and four-wheel-drive (4WD) vehicles.

A conversion U-joint connects driveshaft components with different sizes, such as linking a 1330-series driveshaft to a 1350-series rear-end yoke. This is useful when modifying or upgrading drivetrain components.

• Unusual vibrations—often felt in the floorboard or steering wheel
• Hearing clunking or knocking noises—especially when shifting gears
• Squeaking sounds—indicating worn-out U-joints
• Driveline shuddering—during acceleration
• Difficulty turning—could mean joint failure

Common causes include:

• Normal wear and tear—over time, components degrade
• Lack of lubrication—causes excessive friction and damage
• Improper alignment—leads to stress on joints and bearings
• Excessive torque or weight load—common in high-performance or heavy-duty vehicles
• Rust and corrosion—weakens the driveshaft structure

It’s not recommended to drive with a failing driveshaft. A compromised driveshaft could cause further vehicle damage and/or safety hazards. If you’re noticing symptoms, it’s important to get this inspected immediately.

A well-maintained driveshaft can last between 75,000 to 150,000 miles. Regular inspections and lubrication help extend its lifespan.

FAQ: MAINTENANCE & REPAIRS 

In some cases, driveshafts can be repaired instead of replaced. Repairs typically include:

• Replacing worn-out U-joints
• Balancing the driveshaft to eliminate vibrations
• Fixing a minor bend or crack

If the driveshaft is severely damaged, then a replacement is the best option.

This usually varies depending on vehicle type and application, but the cost typically ranges from $500 to $1,500, including labor.

Yes, to improve durability, you can:

• Increase tubing diameter for added strength
• Use thicker tubing walls
• Upgrade to stronger U-joints
• Switch to non-greaseable U-joints, which tend to be more durable

Yes, upgrading to an aluminum driveshaft can reduce weight by approximately 30% to 40% compared to steel, leading to:

• Improved performance
• Faster acceleration
• Better fuel efficiency
• Reduced rotational mass for improved handling

CAN YOU LENGTHEN OR SHORTEN AN EXISTING DRIVESHAFT?

Yes, driveshafts can be modified:

• Shortening: Cutting and rewelding the tube, then rebalancing
• Lengthening: Replacing the existing tube with a longer one, followed by balancing

A professional should always handle these modifications to ensure proper alignment and safety.

WHY DO MY U-JOINTS KEEP BREAKING? 

Potential reasons include:

• Incorrect U-joint size
• Improper installation / Lubrication
• Worn yokes / Excessive torque
• Improper driveshaft phasing
• The driveshaft is either too long or too heavy
• Unable to handle extreme driving conditions (based on the strength of the driveshaft)
• Low-quality U-joint application
• Improper driveline angle/positioning

FAQ: TROUBLESHOOTING ISSUES

WHY IS MY DRIVESHAFT VIBRATING? 

Possible causes include:

• Out-of-phase driveshaft
• Worn or broken U-joints
• Incorrect U-joint size
• Excessive driveshaft length
• Worn slip yoke or spline
• Lack of lubrication
• Unbalanced or bent driveshaft

WHY DOES MY VEHICLE MAKE A CLUNKING SOUND WHEN CHANGING GEARS? 

This may indicate:

• Worn U-joints
• Loose bolts or connections
• Excessive backlash in the differential

WHATS THE DIFFERENCE BETWEEN A SLIP YOKE & A FIXED YOKE DRIVESHAFT? 

• Slip yoke: Allows axial movement to accommodate changes in length.
• Fixed yoke: Stationary, with no provision for length changes.

WHY DOES MY DRIVESHAFT MAKE A SQUEAKING NOISE?

Squeaking often results from dry or failing U-joints needing lubrication or replacement.

CAN A DRIVESHAFT AFFECT MY FUEL ECONOMY?

Yes, a damaged or heavy driveshaft can increase drag, reducing fuel efficiency.

DO YOU SELL HEAVY-DUTY, NON-GREASEABLE U-JOINTS? 

Yes, we sell both Spicer and Neapco non-greaseable U-joints. 

At Driveshafts, Inc., we believe it's important to understand your driveshaft and how to properly maintain it to maximize performance and prevent costly repairs. This FAQ page helps address commonly asked questions and provide guidance on troubleshooting, maintenance, and repair considerations you may have.

Whether you need expert troubleshooting, an upgraded solution, or a custom-built driveshaft, we’re here to help. 📞 Need expert help with your driveshaft? Contact us today!