Limited slip additive?

Tiny
MIKEPR
  • MEMBER
  • 2004 FORD F-150
  • 4.6L
  • V8
  • 2WD
  • MANUAL
  • 170,000 MILES
Do the 8.8 differential need limited slip additive? Or how do I know I need it?
Tuesday, March 1st, 2022 AT 4:32 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

The 8.8" can be either locking or non-locking. The locking does require an additive. If that is what you have, add 4oz of friction modifier XL-3. I would actually suggest using it regardless.

If you want, I attached a pic below showing how to identify the differential.

Let me know if this helps.

Joe

See pic.
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Tuesday, March 1st, 2022 AT 8:04 PM

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