wondering what intervals these oils need changed, ands what type of oil to buy,also what factory spec addditives to the diffs? thanks...

 

It really depends on what you are doing with the truck, I change my more often because I work the truck hard, but I think generally you should try to change them every 50k-75k

front diff is usually 75-90
rear diff is usually 75-140 with limited slip add-in if neccesary

transfer case is usually the same as the transmission so maybe mercon v

 

The manual said to change all 3 at 150k miles. The front doesn't get the heavy oil or need synthetic.

 

good info, thanks, forgot to mention its a 2005 fx4 f250 4x4 5.4, with 129,000, in my trans I just did a filter fluid change with mercon sp, is this same that goes in the transfer case?

 

yes the same

 

Mercon V........

 

Mercon V replaced the outdated mercon sp so they are the same thing

ech tips

Approval to Service ALL 5R110 Automatic Transmissions with MERCON® LV

Beginning immediately ALL (2003 to 2010 MY) 5R110 automatic transmissions can be serviced with MERCON® LV automatic transmission fluid in place of MERCON® SP.

Initially only the 2009/10MY 5R110 automatic transmissions were filled and serviced with MERCON® LV. In an effort to reduce complexity, Ford Motor Company is allowing all previous model year 5R110 automatic transmissions to be serviced with MERCON® LV automatic transmission fluid. This pertains to top off as well as fluid replacement. Mixing of MERCON® LV and MERCON® SP in the 5R110 transmission is acceptable. Extensive testing has been performed to insure there are no functional or durability concerns with the use of MERCON® LV in the 5R110 automatic transmission.

Vehicles affected are F-Series Super Duty trucks (including chassis cab, motorhome, LCF).

Motorcraft MERCON® LV is now available in three sizes:
Part Number: XT-10-QLVC - 1 quart
Part Number: XT-10-DLV - 55 gallon drum
Part Number: XT-10-BLV - Bulk

Further information can be found in the Workshop Manual, Section 307-1, Automatic Transmission

Mike

 

Any of them should be OK in the T-case.............not that complex.

 

Mercon V did NOT replace SP. Mercon LV replaced SP. Mercon V should not be used in SP/LV applications and vice versa. DO NOT use LV or SP in the transfer case, it's far too thin. The correct fluid to use in the transfer case is Motorcraft XL-12 Transfer Case Fluid, but Mercon V should be ok to use as well.

http://www.fcsdchemicalsandlubricant...ission%20Fluid

 

I agree w/ ExV10, the manual calls for 2qts Mercon ATF for the transfer case...that said I'm not sure using SP would hurt anything if you have a couple extra quarts. BTW, where did you find SP? It's been phased out for a while now, the replacement is LV.

 

I bought the sp from the dealer, they recomended it, as also it says on the trans dipstick, thats the only place I looked for it since I was buying both filters, never knew it was phased out, the truck was last trans serviced by ford at 50,000 with sp. and since they had it, I got it, thanks for all responses. and I bought just enough for the trans, I will need more when I do the transfer case