differential additives or no additives

[EMurillo]

i am a little confused here, i was looking at may manual today and it says

if you have the AAM DIFFERENTIAL you dont need additives, but when i took

my truck in for service at the dealer a while back the told me the diff. needed

to add additives. i have a 2004. 5 ctd 325/600 so i assume i do have the AAM DIFF. does anybody know the scoop on this?





2004. 5 CTD, short bed, 4 x 4, 325/600 high output, rancho shocks, bf goodrich all terrain, billet grill, open exhaust, f/er 30fer, gauges, deep tans pan and more

 

[LRutigliano]

i am a little confused here, i was looking at may manual today and it says

if you have the AAM DIFFERENTIAL you dont need additives, but when i took

my truck in for service at the dealer a while back the told me the diff. needed

to add additives. i have a 2004. 5 ctd 325/600 so i assume i do have the AAM DIFF. does anybody know the scoop on this?





2004. 5 CTD, short bed, 4 x 4, 325/600 high output, rancho shocks, bf goodrich all terrain, billet grill, open exhaust, f/er 30fer, gauges, deep tans pan and more

You are right, dealer is incorrect.

 

[daverobb]

AAM axles have gear type limited slips and DO NOT require LSD additive. The Dana axles have clutch type limited slips and require additive.

 

[BLNRAY]

use synthetic, dont worry about additives

 

[daverobb]

Additive is required in clutch type LSDs regardless of the fluid type.