Castrol Transmax High Mileage Automatic Transmission Fluid, 1 Gallon
Castrol Transmax High Mileage Automatic Transmission Fluid, 1 Gallon
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Castrol Transmax High Mileage Automatic Transmission Fluid, 1 Gallon

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Key item features

  • Leak Prevention: Additional seal conditioners to prevent or help stop leaks
  • Enhanced Cleaning: Extra cleaning agents to reduce varnish and sludge formulation
  • Clutch Protection: Protects against clutch wear
  • Smooth Shifting: Restores smooth shifting
  • Superior Performance: Greater frictional durability provides superior transmission performance
  • Wide Compatibility: Can be used in a wide variety of specifications including DEXRON-IIIH, MERCON, and JASO-1A
  • Warranty Compliance: Exceeds all passenger car and light truck manufacturers warranty requirements for vehicles, transmissions, or power steering service where a DEXRON-IIIH or MERCON type ATF is specified
  • High Mileage Ideal: Ideal for most transmissions with over 75,000 miles
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Current price is Now $27.99
You save $22.00
was $49.99
21.9 ¢/fl oz
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Customer ratings & reviews

4.7 out of 5 stars
stars
94 ratings35 reviews
How item rating is calculated
  1. 5 stars88% (83)
  2. 4 stars6% (6)
  3. 3 stars0% (0)
  4. 2 stars1% (1)
  5. 1 star4% (4)

Reviews summary

Pros

  • : Suitable for high mileage and older automatic transmissions.
  • : Shifts occur with increased smoothness.
  • : Offers affordable options.
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Showing 1-3 of 35 reviews

Jun 26, 2026
Mark
5 out of 5 stars review

Verified Purchase

Came in just as promised. Thanks.

Helpful?2WLZUZMUIRJA175080844
May 9, 2025
Buyersremorse
5 out of 5 stars review

Verified Purchase

Get the Transmission Fluid!

This is the best transmission fluid! The gallon size bottle makes Me feel good about reducing packing waste.

Helpful?2WLZUZMUIRJA175080844
Feb 17, 2025
Angel
5 out of 5 stars review

Verified Purchase

Good for high mileage transmissions

Good Healthy fluid for high mileage transmissions that still operating normal conditions.

Helpful?2WLZUZMUIRJA175080844