Solved 1999 explorer 4.0 SOHC 3.55 fluid change Axel code 45

[C420sailor]

Well done. I just started my rebuilt axle on 75W140 as well. I plan to switch my others over as their oil changes come due, after seeing how thin the 80W90 can get in an old worn rear that’s running hot.

 

[Pete Deering]

Oh, ok that's a perfect explanation would it affect my fuel economy, and should I use Ultra Black or buy the gasket?

They make a green gasket maker. No waiting time. The green is for diff

 

[Mbrooks420]

I’d stick with the Ultra Black, or one of the reusable double row gaskets.

 

[Lee's Automotive]

I’d stick with the Ultra Black, or one of the reusable double row gaskets.

Yep I'm using one on it now