3R26-35A – Weld Yokes – 3R Series – Butt Dia 3.257″ – Tube Dia Wall 3.500X0.125

The Right Weld Yoke Makes or Breaks the Driveshaft

Driveshaft failures traced back to the yoke weld are almost always a fitment problem -- wrong bore, mismatched series, or inadequate wall engagement. The 3R26-35A solves all three: it is machined specifically for 3.500" OD / 0.125" wall steel tube, uses the 3R series u-joint interface, and provides a 2.500"" center-to-weld dimension that fits standard driveshaft geometry for driveshaft vehicles.

Dimensional Data

Construction & Reliability

Aluminum construction cuts rotational mass significantly, a key advantage for high-RPM driveshaft assemblies where unsprung weight matters. All bearing pockets are machined to series-standard dimensions so standard 3R u-joint crosses and snap rings drop in without modification.

Fabrication Best Practices

• Clean and deburr the tube end before inserting into the yoke bore.
• Tack weld at four 90-degree positions before completing the circumferential weld.
• Use ER70S or equivalent filler rated for the base metal (ALUMINUM).
• Post-weld, check TIR at the u-joint seat -- reject if above 0.005".
• Dynamic balance the complete shaft assembly before vehicle installation.

Application Suitability

The 3R series is widely used on driveshaft platforms. Verify that the mating transmission output, transfer case, or differential input uses the same series to avoid cross-series incompatibility at the u-joint interface.