smelly trans oil

[weekendmechanic]

which is it or is it both, I bought an 83 4x4 ford bronco with an automatic C6 transmission that just needed some touch ups here and there, and I have done some work on it it has a good motor except the transmission, it had bad pick up speed and, and little or no reverse, so I changed the motor oil and transmission oil and filter the transmission filter looked fine and so did the oil, and still no change so I replaced the modulator, and the oil that came out smelled burnt and was dark, and I had just changed it the day before, and now I'm told it could be a bad torque converter, any insites on what it might be.

 

[Broncobill78]

Unfortunately by the time your tranny starts burning the fluid and acting up the damage has already been done. Even if it IS only a bad converter there's no fixing it without removing the tranny. Once you've gone thru the hassle of removing the tranny from a 25yr old truck you'd be a fool to not simply have it rebuilt. A bench rebuild for a C6 should run you maybe $750 or so, maybe less if you call around. I would simply rebuild/replace it and be done with it. there just aren't any quick fixes once it starts burning the fluid.