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Transmission Fluid in Bronco II


pbrannon

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Dec 13, 2022
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Vehicle Year
1986
Vehicle
Ford Bronco II
So ive searched and not really found anything... the Bronco i just picked up has regular transmission fluid in it... is there any danger in draining all of it out i can get then putting the 80w90 its supposed to have in it? It is a 5spd
 


Uncle Gump

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Location
Ottawa IL
Vehicle Year
1986
Vehicle
Bronco II
Suspension Style
4wd
Depends on what transmission is in it.

If it's a M5OD... those use ATF.

Earlier FM an TK transmissions use gear lube.

If unsure of what you have... Core Shifter has some info to help you identify what you have.

There has also been a bunch of discussion on this topic over on The Ranger Station.
 

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