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two questions


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ok so to begin this short story, my dad blew my trans. the only one that the jy had was a fm145. i know its not the best but its a little better then the tk5 that blew up.

ok first question im sure has been answered multiple times. 80 90 was put in. had atf before i put in the 80 90. but i can hear a whine with 80 90. should i put in atf like it had. or will it cause the trans to be worse.

question two what other shifter will fit. i could have sworn i saw a post about a straight shifter fitting this model. thanks in advance for any answers.
 


4x4junkie

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Location
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1990
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Bronco II
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2.9 V6
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2.9L V6
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FM145 takes gear oil (GL-4 80W). 80W-90 seems to work ok for most people (myself included when I had the FM146 in my BII). ATF is much too thin for the Mitsubishi transmissions, and is likely why it's whining due to gear and/or bearing damage (the Mazda M5OD is the only RBV (manual) trans that takes ATF, all others use gear oil).
 
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whats the difference between gl-4 80w and 80 90
 

4x4junkie

Forum Staff Member
TRS Forum Moderator
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Location
So. Calif (SFV)
Vehicle Year
1990
Make / Model
Bronco II
Engine Type
2.9 V6
Engine Size
2.9L V6
Transmission
Manual
2WD / 4WD
4WD
Tire Size
35x12.50R15
GL-4 is the specification for manual transmission gear oil lubricant. 80W-90 oils are often rated GL-5 (typically used in differentials). GL-5 oils have been known to attack brass parts (synchros) in some transmissions. Others don't seem affected, so I'm not sure what the criteria is. The FM-series transmissions seem to be OK with it as far as I can tell.

GL-4 oils are a little harder to find, but if you can find it, I'd go with that first.
 
Joined
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ford
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ok thanks. now is there any other shifter i can put on. a straight one perhaps
 

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