If your vehicle manual calls for ATF+4, you must use a fluid that clearly states it meets the ATF+4 or MS-9602 specification. These approved equivalents undergo specific testing to ensure compatibility with Chrysler transmissions, clutch packs, torque converters, and seals.
This guide explains what qualifies as a Mopar ATF+4 equivalent and lists the 5 best ATF+4 fluids commonly available.
Mopar ATF+4 Transmission Fluid Equivalent
1. Mopar Genuine ATF+4 (OEM)
This is the original factory-fill fluid made specifically for Chrysler, Dodge, Jeep, and Ram vehicles.
Features:
- Fully synthetic OEM formulation.
- Meets ATF+4 / MS-9602 specification.
- Designed for factory-level protection and shift quality.
- Ideal for ensuring 100% compatibility.
- Excellent oxidation and thermal resistance.
Why choose it: Best choice if you want the exact same fluid as the manufacturer uses.
2. Pennzoil Platinum ATF+4
Pennzoil’s dedicated ATF+4 product is widely respected and trusted for Chrysler applications.
Features:
- Fully synthetic transmission fluid.
- Engineered specifically to meet MS-9602 requirements.
- Provides strong friction stability for smooth shifting.
- Helps prevent varnish, sludge, and wear.
- Good price-to-performance ratio.
Why choose it: A premium aftermarket option that competes with OEM quality.
3. Castrol Transmax ATF+4
Castrol is a major global lubricant brand known for durable, industry-approved transmission fluids.
Features:
- Full synthetic formula for long service life.
- Meets all ATF+4 performance requirements.
- Consistent friction behavior for smooth, reliable shifts.
- Excellent temperature protection.
- Available in single quarts and multi-packs.
Why choose it: Reliable, high-performance choice for Chrysler vehicles needing ATF+4.
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4. Valvoline ATF+4 Full Synthetic
Valvoline is a top-tier lubricant manufacturer with a strong reputation for quality.
Features:
- Fully synthetic and engineered specifically for ATF+4 applications.
- Meets or exceeds MS-9602 performance.
- Protects against wear, deposits, and overheating.
- Delivers stable shifting under all operating conditions.
- Available in quarts and gallon containers.
Why choose it: Excellent aftermarket option that balances quality and affordability.
5. TRIAX ATF XT (ATF+4 Compatible)
TRIAX offers a high-value, full synthetic fluid marketed for ATF+4 systems.
Features:
- Full synthetic formulation designed for ATF+4 transmissions.
- Provides strong heat resistance and anti-wear performance.
- Frequently sold in larger bottles for full fluid changes.
- Good option for high-mileage vehicles.
- Maintains stable friction properties.
Why choose it: A budget-friendly choice for full transmission service without sacrificing compatibility.
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What Makes a Mopar ATF+4 Equivalent?
To count as a true equivalent, a fluid must:
- Meet Chrysler MS-9602 (ATF+4) specification.
- Be fully synthetic, matching the thermal and oxidation stability of Mopar’s OEM formulation.
- Maintain proper friction stability for smooth shifting and clutch durability.
- Be backward compatible with ATF+, ATF+2, and ATF+3.
- Be safe for both refill and top-off in ATF+4 systems.
Generic Dexron/Mercon fluids cannot replace ATF+4 unless the bottle explicitly states ATF+4 compatibility.
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FAQs
What transmission fluid is compatible with ATF 4?
Any fluid that explicitly states it meets the Chrysler MS-9602 specification is compatible with ATF+4. This includes many fully synthetic ATF+4-labeled fluids from brands like Mopar, Valvoline, Castrol, Pennzoil, and TRIAX. Generic ATF, Dexron, or Mercon fluids are not compatible unless the bottle specifically indicates ATF+4 approval.
What is ATF4 compatible with?
ATF+4 is compatible with automatic transmissions in Chrysler, Dodge, Jeep, and Ram vehicles that require ATF+, ATF+2, ATF+3, or ATF+4. It is fully backward compatible with older Chrysler ATF specifications but should not be used in transmissions that call for Dexron, Mercon, CVT, or other specialty fluids.
Is Valvoline ATF-4 compatible with Mopar ATF-4?
Yes. Valvoline ATF+4 is engineered to meet or exceed the ATF+4 / MS-9602 specification. It is fully compatible with Mopar ATF+4 and can be used for top-offs or full fluid changes in vehicles requiring Mopar ATF+4.
Who makes Mopar ATF4?
Mopar ATF+4 is produced for Stellantis (formerly FCA/Chrysler) by licensed lubricant manufacturers. Multiple major oil companies supply ATF+4 under Mopar branding, but all must meet the same strict MS-9602 standards set by the manufacturer.
Can I use regular ATF instead of ATF 4?
No. Regular ATF, Dexron, or Mercon fluids do not match the friction characteristics or additive package required for ATF+4 transmissions. Using non-ATF+4 fluid can cause harsh shifting, clutch wear, overheating, or long-term transmission damage. Only use ATF+4 or a fluid that clearly lists ATF+4/MS-9602 compatibility.
How often should ATF4 be changed?
The typical change interval for ATF+4 is 60,000–100,000 miles, depending on driving conditions. Severe-duty vehicles, such as those that tow, drive off-road, or operate in extreme heat, may require more frequent changes, often around 30,000–50,000 miles.
Final Thoughts
Choosing the right ATF+4 equivalent is crucial for the long-term reliability of your vehicle’s transmission. Mopar ATF+4 is a specialized fluid with specific friction and performance characteristics, so using an approved equivalent is essential.
Whether you choose the OEM Mopar bottle or a top-tier aftermarket brand like Pennzoil, Castrol, or Valvoline, you’ll protect your transmission and maintain smooth, consistent shifting.
