Diff Oil

[petetheengineer]

Hi guy have done a bit of searching around but cant seem to find a sutible substitute for the diff oils that ford sell for stupid amounts of money.

Does anyone know of a replacment oil that i can get a hold of for under a hundred quid.

Thanks

 

[Oxygen]

75w90 or 75w140

 

[petetheengineer]

thanks but worry is that the rear diff uses some special oil apparently so is either of the above in fully synthetic ok to use?
thanks

 

[Howard]

If you use fully synthetic then you don't need the friction modifier.

 

[petetheengineer]

thanks guys i will get some fully synthetic

 

[Aspire]

OK any particular brand plus I am going to do transfer box at same time. Then only thing to do is change brake fluid then all mine done!

 

[Oxygen]

royal purple is good, mobil 1, etc.. i used valvoline high performance gear oil 75w90 in my rear differential and i like it! not bad for $7 a quart compared to royal purples $19 a quart..

and for your transfer case get some ATF with mercon V in it, it is made for fords..

when i did my transfer case i also used valvoline for it too!