QU40871 3.5" X 0.083" X 72" Driveshaft Tubing

QU40871 3.5" x 0.083" Wall Thickness x 72" long Rear Driveshaft Torque Tube From the mid 1970's to current, most steel tubed rear driveshafts in full size domestic 3/4 ton and 1 ton Light trucks are made from 3", 3.5" or 4" outside diameter tubing with a wall thickness of 0.083". To retube or lengthen a driveshaft, calculate the length required and round that number UP to the next full inch. This will give you a little extra tube to machine off when end facing the tube. USA Made. QU40871 is sold by the 72" length.

Also see: TK40978 3.5" x 0.083" Driveshaft Tubing by the inch
Also See: QU40870 3" x 0.083" Driveshaft Tubing by the inch
Also See: QU40872 4" x 0.083" Driveshaft Tubing by the inch

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Dan the Gear Man® Tech Notes:
Measure Before Ordering
Tech Help
Strength
Applications

Tech Note 1: Measure Before Ordering
Whenever possible, measure your old tube thickness before ordering new tube. While most steel rear shafts are made with 0.083" tube, not all are. Older trucks sometimes used 0.065" tube and some vehicles will have thicker wall tubing. If you order the wrong spec tubing, you own it! Custom Cut lengths of driveshaft tubing are NOT RETURNABLE!

Tech Note 2: Tech Help
Driveshafts need to be retubed anytime the tubing gets bent or dented. Driveshaft assembly can be done by any competent machinist, but best results are usually obtained from dedicated driveshaft specialists who can both build and balance the finished shaft. For information on driveshaft runout and balance, see my TM3000 Driveshaft and Universal Joint Service Manual or TM3000 Excerpt TSB3510 Vibration, Balance, Angles, Ratings, Run Out, Torque Specs.

Tech Note 3: Strength
The strength of driveshaft tubing is dependent upon the material, length, outside diameter, and thickness of the tubing. Larger diameter tubing can take more torque and span longer distances, however about 5' to 6' (with 5' preferred) is the maximum length you can typically make larger diameter, straightened, and balanced steel driveshafts without problems assuming the maximum driveshaft rotational speed is well under the maximum critical speed (5000 rpm for most light truck universal joints) for the size of u-joint and tube.

Applications
Universal