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Trans Fluid Help!!


Mr.Stewart302

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91 ranger v6 3.0 5 speed i got it 1 year ago been running 80/90 in it now im hearing it takes ATF someone please tell me which it is and if it is atf what damage has a year of gear oil done:bawling:
 


Sasquatch_Ryda

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Yup, your M5OD requires Mercon ATF.

How is it shifting?
 

exbass94

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Definitely drain and put ATF in.
 

Sasquatch_Ryda

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Drain it a few times.
 

TRH

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What year did the M5OD's go to using Mercon ATF?
 

Fx4wannabe01

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M5od's have always been ATF.
 

PlumCrazy

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The M50D uses a needle bearing for the input shaft, using gear oil starves the tiny little needles. The PO of my Ranger was running some sort of molasses in my trans. I flushed it out a time or two and I ran regular Mercon in it for a while but the bearing was noisy when sitting in neutral. I drained it and refilled with full synthetic Mercon and it quieted it down a bit.

-plumcrazy
 

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