I am having the same problem with my 86 trooper. I have replaced all the filters within the last two months and changed all the fluids. I don't know what might be wrong so I am in the same boat as you.
-------------------- 86 Trooper II
Stock except for the Rust and dents that came with it. Restoration while being a daily Driver is in progress. Completed so Far-Front Brakes, Rear Brakes, Frame restoration, 1 1/2" lift shackles, custom front and rear bumpers
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