Overview
The Dana Spicer 2-70-48X is a U-joint strap kit for Dana GM 3R and S44 series driveshafts. A strap kit clamps the U-joint bearing caps to the yoke so the driveshaft stays correctly held in place. This kit is built for bearing caps measuring 1.125 inches and is described by Dana Spicer as universal fit, which means it is matched by U-joint series and cap size rather than by vehicle model.
The kit uses stamped high strength steel straps and grade 8 retaining bolts. Dana Spicer describes these kits as hard to find and says they cover most common driveshaft U-joint sizes, giving a way to keep an expensive driveshaft correctly held in place.
Key features
- Stamped high strength steel straps
- Grade 8 retaining bolts with .312-24 fine thread
- Designed for 1.125 in bearing caps
- Bolt centers spaced 1.812 in apart
- Kit includes 2 straps and 4 bolts
- Made for Dana GM 3R and S44 series U-joints
Checking the driveshaft first
Strap kits act as a secondary retention method. They clamp the bearing caps to the yoke so the joint stays seated if the usual retention wears or fails. Before fitting straps, clean the yoke ears and cap seats so the straps sit flat and the bolts clamp evenly. Look for galling, cracks or elongated bolt holes, since a worn yoke will not hold a strap securely no matter how well the kit is fitted.
After installation, check the straps and bolts after the first short drive and again at regular driveline inspections. Loose bolts, bent straps or fretting marks around the caps are signs the joint is moving and the setup needs attention. Strap kits back up proper U-joint service rather than replacing it, so inspect the joints for play and replace worn caps before they fail.
- Clean yoke ears and cap seats before fitting
- Inspect for cracks and worn bolt holes
- Recheck bolt tightness after the first drive
Specifications
| Brand | Dana Spicer |
|---|---|
| Part number | 2-70-48X |
| UPC | 23913123079 |
| Application | Dana GM 3R and S44 series U-joint |
| Material | High strength steel straps |
| Bearing cap size | 1.125 in |
| Bolt center to center | 1.812 in |
| Bolt thread | .312-24 fine thread |
| Bolt grade | Grade 8 |
| Included | 2 straps, 4 bolts |
Vehicle fitment
No specific vehicle is named for this kit. Its use is set by the U-joint: it is for Dana GM 3R and S44 series driveshafts with a 1.125 in bearing cap. Universal fit is shown for this part, so check the U-joint series and bearing cap on your driveshaft before installing.
This kit does not cover other bearing cap sizes or axle series. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The kit includes the straps and bolts needed to secure the U-joint, so no separate hardware is listed. Use the four included grade 8 bolts rather than substitutes of a different grade, and confirm the bearing cap measures 1.125 in before fitting the straps.
What’s included
Two stamped high strength steel straps and four grade 8 bolts with .312-24 fine thread.
Not included: the U-joint, yoke and driveshaft.
