1985 GMC Astro Differentials
Keep Your 1985 GMC Astro in Top Shape with Quality Differentials
Whether you’re repairing or upgrading your Differential, using high-quality parts is key to keeping your 1985 GMC Astro looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Differential Oil. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Competitive Prices and Extensive Inventory
The average price for a 1985 GMC Astro Differential at Advance Auto Parts is around $97.99, with a range that starts at $44.99 and goes up to $148.99. With 5 options in stock from one trusted brand, finding the right fit is easy. Popular picks like 3 Qt – 80W90 Conventional Gear Oil with Posi Additive, 3 Qt – Penzoil 80W90 Conventional Gear Oil, and Redline Synthetic "Shock Proof" Oil with Positraction Additive – 4 Quarts start at just $44.99 and offer a great balance of form and function.
Find Your Specific 1985 GMC Astro Differentials
Looking for the perfect Differential for your 1985 GMC Astro? You’re in the right place. Below, you’ll find links to various types of Differentials that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Differentials, ensuring durability and a precise fit for your GMC Astro. Whether you’re driving a 1985 model or another popular model year like
1981,
1982,
1983,
1984,
1986,
1987, and
1988, we’ve got you covered. Purchasing Differentials from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Differentials that fit your vehicle.
Essential 1985 GMC Astro Differentials
Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)
from
$99.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
Product Features:
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Product Features:
- Includes three quarts of Redline Shockproof oil
Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)
from
$137.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
Product Features:
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Product Features:
- Includes four quarts of Redline Shockproof oil
Yukon Gear – Redline Synthetic "Shock Proof" Oil with Positraction Additive – 4 Quarts (Part No.15005)
from
$148.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection. This kit includes four quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.
Product Features:
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Product Features:
- Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive
Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)
from
$44.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials.
Product Features:
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Product Features:
- Includes three quarts of conventional oil
Yukon Gear – 3 Qt – 80W90 Conventional Gear Oil with Posi Additive (Part No.15003)
from
$57.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials. This kit includes three quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.
Product Features:
See More
Product Features:
- Includes three quarts of conventional oil and one 4oz bottle of Yukon positraction additive
Popular 1985 GMC Astro Differentials Categories
Most Popular Differential Oil for 1985 GMC Astros
Enhance your 1985 GMC Astro with one of the 5 Differential Oil we have in stock, starting at just $44.99.
Yukon Gear – 3 Qt – 80W90 Conventional Gear Oil with Posi Additive (Part No.15003)
from
$57.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials. This kit includes three quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.
Product Features:
See More
Product Features:
- Includes three quarts of conventional oil and one 4oz bottle of Yukon positraction additive
Yukon Gear – 3 Qt – Penzoil 80W90 Conventional Gear Oil (Part No.15002)
from
$44.99
Union 76 gear oil is a conventional non-synthetic 80W90 formulation designed for all types of differentials.
Product Features:
See More
Product Features:
- Includes three quarts of conventional oil
Yukon Gear – Redline Synthetic "Shock Proof" Oil with Positraction Additive – 4 Quarts (Part No.15005)
from
$148.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection. This kit includes four quarts of oil and a bottle of Yukon Limited Slip Friction modifier that reduces noise and chatter in clutch driven positraction units and limited slip differentials.
Product Features:
See More
Product Features:
- Includes four quarts of Redline Shockproof oil and one 4oz bottle of Yukon positraction additive
Yukon Gear – Redline Synthetic "Shock Proof" Oil – 3 Quarts (Part No.15000)
from
$99.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
Product Features:
See More
Product Features:
- Includes three quarts of Redline Shockproof oil
Yukon Gear – Redline Synthetic "Shock Proof" Oil – 4 Quarts (Part No.15004)
from
$137.99
Redline Heavy Shockproof Gear Oil is formulated to provide lasting protection.
Product Features:
See More
Product Features:
- Includes four quarts of Redline Shockproof oil
FAQs for 1985 GMC Astro Differentials
What are the best-selling Differentials for 1985 GMC Astros?
Out of 5 Differentials that fit 1985 GMC Astros, the following parts are the top sellers:
- 3 Qt – 80W90 Conventional Gear Oil with Posi Additive (11645418) – $57.99
- 3 Qt – Penzoil 80W90 Conventional Gear Oil (11644279) – $44.99
- Redline Synthetic "Shock Proof" Oil with Positraction Additive – 4 Quarts (11645332) – $148.99
What’s the price range for 1985 GMC Astro Differentials?
The prices of Differentials for the 1985 GMC Astro range from $44.99 up to $148.99 for the most premium parts.
What is the average price of a Differential for a 1985 GMC Astro?
The average price for Differentials for the 1985 GMC Astro is $97.99. Keep in mind the variety of part types within our Differential category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Differentials for other GMC Astro model years?
What are the cheapest Differentials for my 1985 GMC Astro?
The cheapest 1985 GMC Astro Differentials we carry are:
- 3 Qt – Penzoil 80W90 Conventional Gear Oil (11644279) – $44.99
- 3 Qt – 80W90 Conventional Gear Oil with Posi Additive (11645418) – $57.99
- Redline Synthetic "Shock Proof" Oil – 3 Quarts (11645345) – $99.99
- Redline Synthetic "Shock Proof" Oil – 4 Quarts (11644565) – $137.99
- Redline Synthetic "Shock Proof" Oil with Positraction Additive – 4 Quarts (11645332) – $148.99
Does Advance Auto Parts sell Differentials for any other 1985 GMC models?
Yes. We stock Differentials for 20 other popular 1985 GMC models. Some of the most popular are 1985 Jimmy Differentials, 1985 K2500 Differentials, 1985 C2500 Differentials, 1985 K1500 Differentials, and 1985 C1500 Differentials.
What types of Differentials do you sell for my 1985 GMC Astro?
We currently have just 1 Differential in stock for a 1985 GMC Astro, and as of 6/2/26, it is a Differential Oil.
Can I get help with 1985 GMC Astro Differential orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Differentials and more.
What is your return policy for GMC Astro Differentials?
Advance Auto Parts keeps returns simple. For new GMC Astro Differentials and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.