Tranny Service
 

I just checked with the dealer to service my tranny and ask them to use Mobile 1 in it. According to them it is a NO...NO...they will not put Mobile 1, said it would cause my transmission to slip and over the long haul I would have to replace it.

First time I have heard of that so I email Mobile 1 to find out if that is correct. I looked in my owners Manual and it calls for Mercon V. I just figured Mobile 1 would be better but we will wait for the email replies.

Have any of you ran into this issue? What ATF are you using?

i use mobile 1 fully sin. but i just added to the old oil in tranny. it was missing a lot.... works perfect....

I'm running full synthetics on the truck = Royal Purple

Engine - 5w30
Trans - RP Trans Fluid
Diff - 70w90

I have had 75k mi on the engine w/ RP, 50k on the Trans, and 65K on the rear diff and still counting on all. Never had a problem (knocks on wood).

You shouldn't put Mobil 1 in your tranny, a $50 in it's g-string will probably go over better.

Your transmission calls for Mercron V. Use Mercron V, it's a forumla of transmission fluid not a name brand. So if you find a bottle of Mobil 1 Mercron V, go for it. I think I used Casterol the last time I added tranny fluid.

the dealer is trying to cover there own asses. cant blame em.