Ford 8.8

[Oldboy]

Hello,
I just picked up a Ford 8.8 out of an 89 lincoln Lsc. Going to use in my next project. Disc brake, good ratio, inexpensive.
Question: should there be some play or runby in the differential? If i turn the pinion, im getting a bit of a "click" right now i am just cleaning this rear up, stripping it down, prep work. Looked at oil, its dark , but looks normal.
Thanks for weighing in
Russ

 

[Dr Crankenstein]

If it clicks when you rock the pinion back and forth, you have excessive backlash.

If it clicks when you rotate the differential... bearing(s).

.

 

[Yankee Transplant]

Im thinking the same Dr.

 

[Bamamav]

Or maybe a locker?

 

[lowbudget50]

Mine has some sort of locker in it. Its a factory unit and it doesnt make any noise.