* Condition: A brand new, OEM (Original Equipment Manufacturer) differential will be the most expensive. A remanufactured unit will be cheaper, and a used differential will be the cheapest but carries the most risk.
* Type of Differential: The Tahoe offered different rear axle ratios (e.g., 3.73, 4.10) and potentially different types of differentials (locking, limited slip, etc.). The specific type needed will impact the price. You'll need to know your Tahoe's axle ratio and differential type.
* Where You Buy It: Prices will vary widely between dealerships, auto parts stores (like AutoZone, Advance Auto Parts, NAPA), salvage yards, and online retailers like eBay. Dealerships will generally charge the most.
* Labor Costs (Installation): This is a separate cost entirely, and often a significant one. You'll need to factor in the cost of having a mechanic install the differential, if you don't do it yourself.
Rough Estimates:
* Used Differential: $200 - $800 (potentially more depending on condition and rarity). This carries risk; it may need further repair or replacement soon.
* Remanufactured Differential: $600 - $1500 (or more). This offers a balance between cost and reliability.
* New OEM Differential: $1500 - $3000 (or more) depending on the specific part and supplier. This is the most reliable but most expensive option.
Before buying:
* Identify your axle ratio and differential type. This information is usually found on a sticker on the differential itself (often requires removing the cover). Your vehicle's documentation may also help.
* Get multiple quotes. Shop around for the best price and warranty.
* Consider the labor costs. This can easily add $500-$1000 or more to the total cost.
It's impossible to give a precise cost without knowing the specifics of your Tahoe's differential and where you plan to purchase it. Use the estimates above as a starting point and research thoroughly before making a purchase.
