oil for manual trannys

[jax4bangin]

what weight and brand is recomended?

 

[exbass94]

M5ODs use Mercon ATF. Other manuals use 80w-90 gear oil. Any brand will do.

 

[jax4bangin]

im not sure what tranny i have.. my truck is a 2007 4 cylinder, 5 sp manual

 

[Shran]

You have an M5OD.

 

[jax4bangin]

thank u.. dam wish i seen this before.. i changed the tranny oil last week but i just used synthetic gear oil 75-90w.. will this hurt my tranny?? i have drivin it alotttt since then( 900 miles) and i been noticing the smell of gear oil in the cab while driving..

 

[Shran]

I would change it, drive it a bit, and then change it again so that you get the gear lube out of it.

 

[jax4bangin]

dang alrighty.. do u think i did any harm by runnin the wrong stuff for so long? and this mercon atf, is it automatic tranz fluid??

 

[Sasquatch_Ryda]

Yes it is ATF, and your 2007 will use mercon V ATF.

 

[jax4bangin]

thanks for the info guys.. is the mercon atf expensive?

 

[Sasquatch_Ryda]

Not overly. I know we sell it for around $5 CAD per litre at the dealership i'm pulling wrenches at.

 

[jax4bangin]

ok cooll.. do u think i did any harm by runnin the wrong stuff( 75-90w gear oil) for 900 miles??

 

[BRUTUS_T_HOG]

actually ford released a tsb saying that its ok and recommended to use mercon v in all m5od's.

i used HD30 wt in mine for a while, got tired of the power robbing so i drained it all out and the oil that came out was shiny with shift ring particles, still shifts fine though

 

[jax4bangin]

30 weight was too thick??? im running 75-90w.. thats gotta be bad for it?

 

[Sasquatch_Ryda]

As said, drain it out and fill with the mercon V and cross your fingers.

 

[AllanD]

30 weight was too thick??? im running 75-90w.. thats gotta be bad for it?

30weight ENGINE oil and 75w-90 gear oil are NOT numbered in the same numerical scale.

And if you only ran it a few weeks you weren't running it "long"
six months is "long"

Mercon 5 works fine in the newer transmissions ('98-up)
but I prefer the older Mercon in the earlier transmissions.
It's a shift quality thing.

On the newer boxes? I actually prefer the 5

I've run Mercon3 in a late box and didn't like it.
it takes a split second too long for the synchro ring
to squeegee it off the friction cone.

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