* Axle width: The track width (distance between the wheel mounting surfaces) needs to be the same or very close. Even a small difference can cause problems with wheel alignment and tire rubbing. Measure the width of both axles to ensure compatibility.
* Spring perches: The mounting points for the leaf springs must align perfectly. If they don't, the axle won't bolt in correctly.
* Brake components: The brake caliper mounting points, and the brake lines may be different between the years. You might need to adapt or swap components.
* Differential gear ratio: The gear ratio of the differential might be different. This won't prevent installation, but if it's significantly different, it can affect speedometer accuracy and vehicle performance.
* ABS sensors (if equipped): The location of the ABS sensors might differ, requiring additional modifications.
In short: While they are both Dodge Ram 1500s, there's no guarantee of direct fitment without careful comparison of the specific axles. You'd need to physically compare the two axles to ensure compatibility. Just because they're both 1500s doesn't automatically make them interchangeable. It's best to double check dimensions and compare parts before purchasing a used axle.
