What fluid woukd you put

[Raser13]

Hey guys, i have a 91 ranger that i have the M5OD-R1 5speed stick in. I'm swapping trannies since mine is shot fir now. I know it's supposed to have auto trans fluid in it. But that seems to beca bit thin to me. Is there something better? Let me know what you recomend.

 

[Tedybear]

Supposed to have Mercon in it. Some have mixed mercon with other 'blends'.

I'd just stick with what the maker calls for. Safe that way.

S-

 

[4x4junkie]

Yep regular Mercon (a.k.a. "Dex/Merc") is what the M5OD requires. Anything thicker may not lubricate it properly due to the tight tolerances within it.

You could also use something like Synchromax (Royal Purple) in it too. I put that in my BII's M5OD hoping it might improve shift quality a little, which it did help, though not by as much as I had hoped for (I think someone may have put Mercon V fluid in the trans before I got it).