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MFactory Helical- and Plate-Type Diff Break-In Procedure

  • Posted: 01-16-2017 12:37 AM
  • Drivetrain

MFactory differentials have proven to be a fantastic convergence of performance and value. However a great value they are, they are certainly not disposable items. Add in the considerable labor required to install them, it is in the user's best interest that they be installed and broken in properly to ensure longevity.

Helical Type Differentials

Great news! No special break in procedure is needed for these diffs. However it is recommended that the transmission fluid be changed after 500 miles of steady use. The best possible fluid to use is Synchrotech's MTF formulation produced by Torco Oils.


Plate Type Differentials

For these sorts of diffs, a break-in procedure should be followed. The plates in Plate-Type differentials are basically clutch plates. When they lock up they lock up solid, but to get them to grip properly they have to be conditioned. We consulted Synchrotech (AKA MFactory USA) and they gave us this procedure.


The MFactory recommended break-in procedure is as follows:

  1. Fill the transmission with mineral oil 10w30 for break-in.
  2. Drive in a figure-8 for 10 mins (Clutch disengaged while turning, Don’t exceed 15mph)
  3. Drive in a figure-8 (Gently apply part-throttle while turning)
  4. Drive in full-lock circles for 10 mins (To the left, part throttle)
  5. Lean head out of door and vomit.
  6. Drive in full-lock circles for 10 mins (To the right, part throttle)
  7. Drain fluid, clean drain plug.
  8. Fill and add Torco Type-F friction modifier.


Thanks go out to David at Synchrotech for these procedure notes. Except for step 5. I added that one.


Be sure to look up Heeltoe for all your MFactory and Synchrotech needs!

About the Author

Marcus di Sabella Marcus is the founder of Heeltoe Automotive. He's been working with cars (mostly Honda cars) since 1996, and has been providing enthusiasts with excellent products, services, and web experiences since 2002. He's been published in Honda Tuning, and holds a degree in Engineering Technology.


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