Fluids for F250 differential and transfer case

[ProXJC]

Just wondering what I should use for oils in my 01 f250 transfer case and differential. Rear end is limited slip.

 

[WD40]

I use Royal Purple synthetic lubricants in the rear end and change it every 40.000 miles.
Yes I know that's overkill, but my truck tows a lot.
Doug

 

[dboyw]

I use Amsoil ATF for the transfer case, and Severe Gear for the rear end.

 

[ProXJC]

Does anyone know how many quarts each take?

 

[trailey97]

diff can only take so much till it trickles out if im not mistaking...same for transfer case too i believe...

 

[ProXJC]

Yeah I realize that.. just nice to know much to buy.

 

[trailey97]

i know he diff wont hold much... maybe 2qts

 

[Dieselpwrdredneck]

look in the owners manual should tell ya my truck with the dana 80 rear an 60 front take about 7qt between the too if the books, correct

 

[JLDickmon]

ATF (Merc V) in the t-case
Rear diff 75w140 Valvoline Synthetic in the rear diff

 

[Dieselpwrdredneck]

dont forget the friction modifier additve in the rear if ya got a limited slip