It may very well if the '85 was a 2wd (and not a 1 ton). My suspicion is that the 2wd 4cyl Tacos still use a 7.5" dif. Unfortunately I'm mostly speculating from the look of the housing. It doesn't look like a either of the 8 inchers or the 8.25".
Ah, only TRD third members will bolt into their own matching housings and nonother. Skip on the TRD's. Chances are that all 4wd or V6 vehicles will not fit.
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