Dorman 946-921 rear drive shaft for the 1999-2001 Ford F-250 Super Duty and other vehicles carries engine torque back to the rear axle. The shaft has a slip yoke at one end and a bolt-on end at the other.
- Drawn over mandrel (DOM) seamless steel tubing for concentricity, uniform wall thickness and torsional strength
- Dynamically pre-balanced assembly
- Tubing, yokes and U-joints are 100% new
- Greaseable shaft with adjustable overall length
- Dorman OE Solutions product line, standard replacement grade
Quick facts
- Part: Dorman 946-921 drive shaft
- Fits: 1999-2001 Ford F-250 Super Duty and other vehicles
- Position: Rear
- Material: Steel
- Condition: New
A worn rear drive shaft can show up as vibration under acceleration, a clunk when shifting or play in a joint. Tires, wheels and other drivetrain parts can produce a similar vibration, so find the source before replacing the shaft; with the engine off, a shop can check the shaft for dents and the joints for play.
Fits
This drive shaft fits the 1999-2001 Ford F-250 Super Duty and the 1999-2001 Ford F-350 Super Duty.
Specifications
Fit and size
- Position: Rear
- Quantity per vehicle: 1
- Shaft diameter: 3.5 in
- Wall thickness: 0.083 in
- Length: 55.91 in
- Ends: bolt-on end and slip yoke end
Build and materials
- Construction: 1-piece assembly
- Material: Steel
- Greaseable: Yes
- Overall length adjustable: Yes
- Balancing: dynamically pre-balanced
- Grade: Standard replacement
- Condition: New
- Country of origin: United States
In the box
One drive shaft. This listing holds one, and the fitment calls for one per vehicle. CV joints and an axle nut are not included.
Installation notes
- Arrives fully assembled and ready to install on the specified vehicles.
Interchange: FDP-109
F81Z4602DH · F81Z4602DHG
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
F81Z4602DH, F81Z4602DHG, FDP-109
Frequently Asked Questions
Is the Dorman 946-921 drive shaft right for a 1999-2001 Ford F-250 Super Duty?
Yes. Dorman 946-921 is a rear drive shaft that fits the 1999-2001 Ford F-250 Super Duty and the 1999-2001 Ford F-350 Super Duty.
Does this drive shaft come with CV joints or an axle nut?
No. The listing is one steel drive shaft; CV joints and an axle nut are not included.
How long is the Dorman 946-921 and what is its shaft diameter?
Dorman 946-921 is 55.91 in long with a 3.5 in shaft diameter and 0.083 in wall thickness. Its overall length is adjustable.
Is the Dorman OE Solutions drive shaft made of steel tubing?
Yes. This rear drive shaft is steel, made from drawn over mandrel (DOM) seamless steel tubing.
Is this Dorman drive shaft greaseable?
Yes. The shaft is greaseable and has a slip yoke at one end, with adjustable overall length.
