Changing axle seals and differential cover. Is XL3 friction modifier needed?

[nastynivek]

The title of the thread says it all. I'm replacing the stock differential cover with the TA performance cover.

 

[nastynivek]

Well, it's pretty dead in here. I guess I'll stop by the local Ford stealership and get their expertise. Thanks y'all.

 

[fishin-nole]

Kevin, everyone has migrated to Lightningrodder or facebook. I'm fairly sure you do have to add friction modifier. Dusten checks in everyday he may know for sure.

 

[Dusten]

A) your post was only 12 hours old....

B) If you have a stock differential you need friction modifier.

 

[nastynivek]

Thanks for your help Dusten.

 

[SID297]

If you're using an oil like Royal Purple or Amsoil you may be able to get by not using the FM, but I have seen it go both ways. In the end it's just easier to go ahead and pour it in and forget about it.