Diff oil d8dz-19c547-a

Topic: Diff oil d8dz-19c547-a (Read 1282 times) previous topic - next topic

Diff oil d8dz-19c547-a

April 04, 2017, 01:29:31 AM

Can any one confirm the oil grade I have 80-90w gl4 as a cross reference also what is that bloody big chunk of metal that hangs under the diff was a real pain to get the filler plug out.3.8 cougar non slip diff.

Diff oil d8dz-19c547-a

Reply #1 – April 05, 2017, 09:39:41 PM

I think most people run 75-140 in their traclok 8.8's, it might be less critical on an open diff 7.5 tho (which I assume you have). As far as the anchor attached to it, its suppose to dampen vibrations, I've always removed mine and felt no difference, but I'm sure Ford had their reasons.

Diff oil d8dz-19c547-a

Reply #2 – April 06, 2017, 12:33:30 PM

75W-90 will work too, that's what I run.

Diff oil d8dz-19c547-a

Reply #3 – April 07, 2017, 01:13:00 AM

Ok thanks for the replies will be using 80-90 as have lots of the stuff and going to remove the lump of metal after a run to see if it actually does anything except make the car weigh more.

Diff oil d8dz-19c547-a

Reply #4 – April 07, 2017, 01:59:29 AM

Supposedly it's to dampen vibration. I've heard they were ratio/rear specific as far as weight, although I cannot confirm or deny it. I do wonder if they stop gear whine....

Took mine out eons ago.....