duradrive hd synthetic

DURADRIVE HD SYNTHETIC 668

DURADRIVE™ HD SYNTHETIC 668 WHAT YOU NEED TO KNOW

INTRODUCTION

When updating a customer from a previous generation fluid to a new generation fluid, it is always good to be prepared to explain how the oils can be mixed and how that will affect the equipment oil drain. With the addition of DuraDrive HD Synthetic 668 to our product line, here is some information that we think you will need in order to help sell the product and answer any questions your customers might have. It is also good to know which transmissions can use DuraDrive HD Synthetic 668 and which can not.

COMPATIBILITY AND MIXING

Approved TES 389™ / TES 295® & TES 668™ fluids; are they all compatible?

Yes, approved TES 389™/ TES 295® & TES 668™ fluids are all compatible and they can be mixed in any ratios.

How is the oil drain interval affected when mixing a TES 389™ fluid with a TES 295® or TES 668™ fluid?

The oil drain interval is reduced to the TES 389™ oil drain interval as recommended by Allison in their Transmission Fluid/Filter Change Recommendations (https://www.allisontransmission.com/en-gb/parts-service/faq-service-tips)

What if one is upgrading from TES 389™ to TES 295® or TES 668™ fluid? When is it possible to transition to the extended oil drain interval?

Only after the second oil change with TES 295® or TES 668™ can the end user or OEM transition to the extended oil drain interval. This can be achieved by a double drain/fill where the oil changes are executed back to back with a short period of operation that includes all shifts to be able to fully exchange the fluids.

This is the reason why Allison fills their on-highway transmissions with next generation TES 668™ fluid and recommends their customers to do the same to obtain the extended oil drain.

Some examples:

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