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Up to 25% Off Online Orders of Select Parts & Accessories. Enter Promo Code MMJ25 in Cart.

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Receive Up To 25% Off Your Online Purchase Of Select Parts and Accessories Instantly

When items are added to the cart, the discount will automatically deduct off the price of the qualifying items. Offers not valid in combination with any other discounts, promotions or items already on sale. Not valid on gift cards, special orders, installation, commercial or fleet purchases. Those products that are included in these offers will be displayed in product search results and product detail pages. Excludes select products, items already on sale and MAP priced brands & items. For full category inclusions and disclaimers, See Details Here. Valid online until 11:59 PM EST on 5/31/18.

Additional Promotions Not Included in the above:

Receive 10% Off Select Wagner branded brake parts with your online purchase. Use promotional code: WAGNER10.

Receive 10% Off Select Champion branded products with your online purchase. Use promotional code: CHAMP10.

Receive 10% Off Select FelPro branded products with your online purchase. Use promotional code: FELPRO10.


The TRANSMISSION is one of a vehicle's most vital components. With almost 1,000 FINELY ENGINEERED, PRECISION PARTS, it is one of the most complex and expensive units to repair or replace. Using the right oil and changing it at the right time is the key to preventing transmission problems before they occur.

Service your transmission as recommended to improve shifting performance, help improve fuel economy, prevent leaks and extend transmission life. Castrol’s® Transmax® ATF fluids are OEM approved and specially formulated to protect vital transmission components.

Castrol® Transmax® with Smooth Drive Technology™ automatically adjusts its friction level in response to changing pressures on critical transmission parts – delivering enhanced protection and a smoother drive for longer, eliminating noise and shudder and keeping things running like clockwork.

Castrol® Transmax® Full
Synthetic Multi-vehicle with
Smooth Drive Technology™
First product licenced for both GM DEXRON®-VI and Ford MERCON® LV and exceeds JASO 1A requirements.

Castrol® Transmax®
DEXRON®-VI with Smooth
Drive Technology™
Certified for use in all General Motors vehicles.

Castrol® Transmax®
Smooth Drive Technology™
Certified for use in Ford vehicles that require Mercon® or Mercon® V.

Castrol® Transmax® ATF+4®
Full synthetic formula exceeds ATF+3® requirements. For use in Chrysler vehicles.

Castrol® Transmax®
For use in older Ford and General Motors vehicles.

Castrol® Transmax® Import
For use in Honda, Toyota, Nissan and other imported vehicles.

Castrol® Transmax® Type F
For use in older Ford vehicles that require Type F ATF. Formulated to control transmission wear.