* Model: Are both trucks the same model (e.g., Silverado, C1500, etc.)? Even within a model line, there can be variations.
* Wheelbase: The wheelbase (distance between the axles) must be the same or very close. A mismatched wheelbase will cause significant issues.
* Axle type: The type of axle (e.g., 8.5-inch, 10-bolt, 12-bolt) needs to be compatible. While the bolt pattern might be the same, the housing itself may be different dimensions.
* Suspension: The suspension components (leaf springs, shocks, etc.) need to be compatible with the rear end. Minor adjustments might be possible, but major differences could be problematic.
* Brake system: The brake components should be compatible. However, this is usually easily adaptable.
In short: You need to verify the specifics of the rear ends on both trucks. Simply checking the model year isn't sufficient. Compare axle types, spring perches, and overall dimensions carefully before attempting an installation. If you're unsure, consulting a mechanic or parts specialist is highly recommended. Trying to force a mismatched rear end could lead to damage and safety hazards.
